1
|
Sheikh A, Fleckenstein JM. Interactions of pathogenic Escherichia coli with CEACAMs. Front Immunol 2023; 14:1120331. [PMID: 36865539 PMCID: PMC9971599 DOI: 10.3389/fimmu.2023.1120331] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/30/2023] [Indexed: 02/16/2023] Open
Abstract
The pathogenic Escherichia coli can be parsed into specific variants (pathovars) depending on their phenotypic behavior and/or expression of specific virulence factors. These pathogens are built around chromosomally-encoded core attributes and through acquisition of specific virulence genes that direct their interaction with the host. Engagement of E. coli pathovars with CEACAMs is determined both by core elements common to all E. coli as well as extrachromosomally-encoded pathovar-specific virulence traits, which target amino terminal immunoglobulin variable-like (IgV) regions of CEACAMs. Emerging data suggests that engagement of CEACAMs does not unilaterally benefit the pathogen and that these interactions may also provide an avenue for pathogen elimination.
Collapse
Affiliation(s)
- Alaullah Sheikh
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO, United States
| | - James M. Fleckenstein
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO, United States
- Infectious Diseases, Medicine Service, Veterans Affairs Saint Louis Health Care System, Saint Louis, MO, United States
| |
Collapse
|
2
|
Yunussova N, Sypabekova M, Zhumabekova Z, Matkarimov B, Kanayeva D. A Novel ssDNA Aptamer Targeting Carcinoembryonic Antigen: Selection and Characterization. BIOLOGY 2022; 11:biology11101540. [PMID: 36290442 PMCID: PMC9598387 DOI: 10.3390/biology11101540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/20/2022]
Abstract
One of the major causes of a drastically shorter life expectancy and one of the most prevalent diseases in the world today is cancer. Given the data on the rise in cancer cases throughout the world, it is obvious that, despite the diagnostic techniques currently being used, there is a pressing need to develop precise and sensitive techniques for early diagnosis of the disease. A high degree of affinity and specificity towards particular targets is maintained by the short nucleic acid molecules known as aptamers. Aptamers outperform antibodies due to their unique benefits, such as their simplicity in synthesis and modification, lack of toxicity, and long-term stability. Utilizing an accurate recognition element and a robust signal transduction mechanism, molecular diagnostics can be extremely sensitive and specific. In this study, development of new single-stranded DNA aptamers against CEA for use in cancer diagnostics was accomplished using SELEX and NGS methods. As a result of 12 iterative SELEX rounds, nine aptamer candidates against CEA were developed. NGS comparative analysis revealed that round twelve had an enriched number of aptamers that were specifically bound, as opposed to round eight. Among the selected nine sequences characterized by bioinformatics analysis and ELONA, an aptamer sequence with the highest specificity and affinity for the target protein was identified and further examined. Aptamer sequence (6) was screened in a concentration-dependent assay, specificity analysis was performed, and its potential secondary and tertiary structures were predicted, which enabled us to test one of the possible putative interactions with CEA. Finally, aptamer sequence (6) labelled with a Cy5 fluorescent tag was used in confocal microscopy to observe its binding towards the CEA expressed in HT-29 human colon adenocarcinoma cell line.
Collapse
Affiliation(s)
- Nigara Yunussova
- Ph.D. Program in Life Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan
| | - Marzhan Sypabekova
- National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan
| | - Zhazira Zhumabekova
- M.Sc. Program in Biological Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan
| | - Bakhyt Matkarimov
- National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan
| | - Damira Kanayeva
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan
- Correspondence:
| |
Collapse
|
3
|
Gandhi AK, Sun ZYJ, Huang YH, Kim WM, Yang C, Petsko GA, Beauchemin N, Blumberg RS. Structural analysis of human CEACAM1 oligomerization. Commun Biol 2022; 5:1042. [PMID: 36180783 PMCID: PMC9525683 DOI: 10.1038/s42003-022-03996-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 09/14/2022] [Indexed: 11/09/2022] Open
Abstract
The human (h) CEACAM1 GFCC’ face serves as a binding site for homophilic and heterophilic interactions with various microbial and host ligands. hCEACAM1 has also been observed to form oligomers and micro-clusters on the cell surface which are thought to regulate hCEACAM1-mediated signaling. However, the structural basis for hCEACAM1 higher-order oligomerization is currently unknown. To understand this, we report a hCEACAM1 IgV oligomer crystal structure which shows how GFCC’ face-mediated homodimerization enables highly flexible ABED face interactions to arise. Structural modeling and nuclear magnetic resonance (NMR) studies predict that such oligomerization is not impeded by the presence of carbohydrate side-chain modifications. In addition, using UV spectroscopy and NMR studies, we show that oligomerization is further facilitated by the presence of a conserved metal ion (Zn++ or Ni++) binding site on the G strand of the FG loop. Together these studies provide biophysical insights on how GFCC’ and ABED face interactions together with metal ion binding may facilitate hCEACAM1 oligomerization beyond dimerization. The crystal structure of human CEACAM1 IgV oligomer and structural analyses provide insight into higher-order oligomerization involving GFCC’ face-mediated homodimerization, flexible ABED interfaces, and dynamic metal-ion bridging.
Collapse
Affiliation(s)
- Amit K Gandhi
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
| | - Zhen-Yu J Sun
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA
| | - Yu-Hwa Huang
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Walter M Kim
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Chao Yang
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Gregory A Petsko
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Nicole Beauchemin
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, QC, Canada
| | - Richard S Blumberg
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
| |
Collapse
|
4
|
Kim EY, Cha YJ, Jeong S, Chang YS. Overexpression of CEACAM6 activates Src-FAK signaling and inhibits anoikis, through homophilic interactions in lung adenocarcinomas. Transl Oncol 2022; 20:101402. [PMID: 35358791 PMCID: PMC8968058 DOI: 10.1016/j.tranon.2022.101402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 03/17/2022] [Indexed: 11/29/2022] Open
Abstract
CEACAM6 is overexpressed in most lung adenocarcinomas. CEACAM6 is significantly expressed in lung cancer cells of non-smokers. Lung adenocarcinoma patients overexpressing CEACAM6 have shorter overall survival. Exogenous CEACAM5/6 interacts with cell membrane-bound CEACAM6 in lung cancers. CEACAM6 homophilic interactions inhibit anoikis through Src-FAK activation.
Among carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family proteins, CEACAM6 has received less attention than CEACAM5 and its presence and role in lung cancer are largely unknown. The application of CellphoneDB on the single cell RNA sequencing dataset showed that the homophilic interactions among CEACAM6 molecules, which are overexpressed in lung cancer cells were highly significant. CEACAM6 was overexpressed in 80.1% of lung adenocarcinomas and its overexpression had a significant relationship with non-smoking history and activating EGFR mutations. The effect of CEACAM6 overexpression on patient prognosis was evaluated using TCGA-LUAD dataset; the CEACAM6 overexpression group showed a shorter overall survival than that of the control group when matched for stage, age, sex, and pack-years. Immunoblotting of cell culture soup and ELISA of human derived material suggested that the majority of CEACAM6 was present on the cancer cell surface and interacted with other cancer cells in the crowded tumor microenvironment. Treatment with CEACAM6 showed CEACAM6 homophilic interactions in the cell membrane and anoikis inhibition through the activation of the Src-FAK pathway. Inhibition of CEACAM6 or its homophilic interactions in the cancer cell membrane may provide another therapeutic strategy for lung cancer.
Collapse
|
5
|
Lee JS, Song IH, Warkad SD, Yeom GS, Nimse SB. An abiotic fluorescent probe for the detection and quantification of carcinoembryonic antigen. Bioorg Chem 2022; 119:105490. [PMID: 34836645 DOI: 10.1016/j.bioorg.2021.105490] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/30/2021] [Accepted: 11/10/2021] [Indexed: 11/02/2022]
Abstract
The reported methods mainly use biomolecules such as antibodies, enzymes, and aptamers for biomarker detection. However, applying an abiotic fluorescent probe to detect cancer biomarkers such as carcinoembryonic antigen (CEA) has not been reported. In this regard, we conceived an abiotic fluorescent probe BIQ-1 for the rapid yet straightforward detection of CEA. The bioinformatics tools and molecular docking techniques were used to develop the probe BIQ-1 for the selective detection and quantification of CEA in a buffer matrix resembling serum. The probe BIQ-1 exhibited a limit of detection of 0.2 ng/mL for CEA in a simple cuvette-based experiment. The BIQ-1 did no show interference from the possible interfering components such as hemoglobin, intralipid, and human serum albumin (HSA) in concentrations several-fold higher (µg/mL) than CEA.
Collapse
Affiliation(s)
- Jung-Seop Lee
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, South Korea
| | - In-Ho Song
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, South Korea
| | | | - Gyu Seong Yeom
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, South Korea
| | - Satish Balasaheb Nimse
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, South Korea.
| |
Collapse
|
6
|
Belcher Dufrisne M, Swope N, Kieber M, Yang JY, Han J, Li J, Moremen KW, Prestegard JH, Columbus L. Human CEACAM1 N-domain dimerization is independent from glycan modifications. Structure 2022; 30:658-670.e5. [PMID: 35219398 PMCID: PMC9081242 DOI: 10.1016/j.str.2022.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 11/15/2021] [Accepted: 02/01/2022] [Indexed: 12/31/2022]
Abstract
Carcinoembryonic cellular adhesion molecules (CEACAMs) serve diverse roles in cell signaling, proliferation, and survival and are made up of one or several immunoglobulin (Ig)-like ectodomains glycosylated in vivo. The physiological oligomeric state and how it contributes to protein function are central to understanding CEACAMs. Two putative dimer conformations involving different CEACAM1 N-terminal Ig-like domain (CCM1) protein faces (ABED and GFCC'C″) were identified from crystal structures. GFCC'C″ was identified as the dominant CCM1 solution dimer, but ambiguity regarding the effect of glycosylation on dimer formation calls its physiological relevance into question. We present the first crystal structure of minimally glycosylated CCM1 in the GFCC'C″ dimer conformation and characterization in solution by continuous-wave and double electron-electron resonance electron paramagnetic resonance spectroscopy. Our results suggest the GFCC'C″ dimer is dominant in solution with different levels of glycosylation, and structural conservation and co-evolved residues support that the GFCC'C″ dimer is conserved across CEACAMs.
Collapse
|
7
|
Rumpret M, von Richthofen HJ, Peperzak V, Meyaard L. Inhibitory pattern recognition receptors. J Exp Med 2022; 219:212908. [PMID: 34905019 PMCID: PMC8674843 DOI: 10.1084/jem.20211463] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/03/2021] [Accepted: 12/02/2021] [Indexed: 12/18/2022] Open
Abstract
Pathogen- and damage-associated molecular patterns are sensed by the immune system's pattern recognition receptors (PRRs) upon contact with a microbe or damaged tissue. In situations such as contact with commensals or during physiological cell death, the immune system should not respond to these patterns. Hence, immune responses need to be context dependent, but it is not clear how context for molecular pattern recognition is provided. We discuss inhibitory receptors as potential counterparts to activating pattern recognition receptors. We propose a group of inhibitory pattern recognition receptors (iPRRs) that recognize endogenous and microbial patterns associated with danger, homeostasis, or both. We propose that recognition of molecular patterns by iPRRs provides context, helps mediate tolerance to microbes, and helps balance responses to danger signals.
Collapse
Affiliation(s)
- Matevž Rumpret
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
| | - Helen J von Richthofen
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
| | - Victor Peperzak
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Linde Meyaard
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
| |
Collapse
|
8
|
Iwabuchi E, Miki Y, Sasano H. The Visualization of Protein-Protein Interactions in Breast Cancer: Deployment Study in Pathological Examination. Acta Histochem Cytochem 2021; 54:177-183. [PMID: 35023880 PMCID: PMC8727844 DOI: 10.1267/ahc.21-00084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/14/2021] [Indexed: 11/22/2022] Open
Abstract
The therapeutic strategy is determined by protein expression using immunohistochemistry of estrogen receptor (ER), progesterone receptor, and human epidermal growth factor receptor 2 (HER2) in formalin-fixed paraffin-embedded (FFPE) breast cancer tissues. However, few proteins function independently, and many of them functions due to protein-protein interactions (PPIs) with other proteins. Therefore, it is important to focus on PPIs. This review summarizes the PPIs of ER and HER2 in breast cancer, especially those using a proximity ligation assay that can visualize PPIs in FFPE tissues. In particular, assessing the interaction of CEACAM6 with HER2 may serve as a surrogate marker for the efficacy of trastuzumab in patients with breast cancer. Therefore, in this review, the technique used to detect the interaction of CEACAM6 and HER2 in routinely processed pathological specimens will be applied to the clinical practice of drug selection. We showed the possibility as a novel pathological examination method using PPIs.
Collapse
Affiliation(s)
- Erina Iwabuchi
- Department of Pathology, Tohoku University Graduate School of Medicine
| | - Yasuhiro Miki
- Department of Disaster Obstetrics and Gynecology, International Research Institute of Disaster Science (IRIDes), Tohoku University
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Graduate School of Medicine
| |
Collapse
|
9
|
Chatterjee S, Basak AJ, Nair AV, Duraivelan K, Samanta D. Immunoglobulin-fold containing bacterial adhesins: molecular and structural perspectives in host tissue colonization and infection. FEMS Microbiol Lett 2021; 368:6045506. [PMID: 33355339 DOI: 10.1093/femsle/fnaa220] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/21/2020] [Indexed: 12/16/2022] Open
Abstract
Immunoglobulin (Ig) domains are one of the most widespread protein domains encoded by the human genome and are present in a large array of proteins with diverse biological functions. These Ig domains possess a central structure, the immunoglobulin-fold, which is a sandwich of two β sheets, each made up of anti-parallel β strands, surrounding a central hydrophobic core. Apart from humans, proteins containing Ig-like domains are also distributed in a vast selection of organisms including vertebrates, invertebrates, plants, viruses and bacteria where they execute a wide array of discrete cellular functions. In this review, we have described the key structural deviations of bacterial Ig-folds when compared to the classical eukaryotic Ig-fold. Further, we have comprehensively grouped all the Ig-domain containing adhesins present in both Gram-negative and Gram-positive bacteria. Additionally, we describe the role of these particular adhesins in host tissue attachment, colonization and subsequent infection by both pathogenic and non-pathogenic Escherichia coli as well as other bacterial species. The structural properties of these Ig-domain containing adhesins, along with their interactions with specific Ig-like and non Ig-like binding partners present on the host cell surface have been discussed in detail.
Collapse
Affiliation(s)
- Shruti Chatterjee
- School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Aditya J Basak
- School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Asha V Nair
- School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Kheerthana Duraivelan
- School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Dibyendu Samanta
- School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| |
Collapse
|
10
|
Gandhi AK, Sun ZYJ, Kim WM, Huang YH, Kondo Y, Bonsor DA, Sundberg EJ, Wagner G, Kuchroo VK, Petsko GA, Blumberg RS. Structural basis of the dynamic human CEACAM1 monomer-dimer equilibrium. Commun Biol 2021; 4:360. [PMID: 33742094 PMCID: PMC7979749 DOI: 10.1038/s42003-021-01871-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 02/18/2021] [Indexed: 02/07/2023] Open
Abstract
Human (h) carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) function depends upon IgV-mediated homodimerization or heterodimerization with host ligands, including hCEACAM5, hTIM-3, PD-1, and a variety of microbial pathogens. However, there is little structural information available on how hCEACAM1 transitions between monomeric and dimeric states which in the latter case is critical for initiating hCEACAM1 activities. We therefore mutated residues within the hCEACAM1 IgV GFCC' face including V39, I91, N97, and E99 and examined hCEACAM1 IgV monomer-homodimer exchange using differential scanning fluorimetry, multi-angle light scattering, X-ray crystallography and/or nuclear magnetic resonance. From these studies, we describe hCEACAM1 homodimeric, monomeric and transition states at atomic resolution and its conformational behavior in solution through NMR assignment of the wildtype (WT) hCEACAM1 IgV dimer and N97A mutant monomer. These studies reveal the flexibility of the GFCC' face and its important role in governing the formation of hCEACAM1 dimers and selective heterodimers.
Collapse
Affiliation(s)
- Amit K. Gandhi
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
| | - Zhen-Yu J. Sun
- grid.65499.370000 0001 2106 9910Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA USA
| | - Walter M. Kim
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
| | - Yu-Hwa Huang
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
| | - Yasuyuki Kondo
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA ,grid.31432.370000 0001 1092 3077Present Address: Division of Gastroenterology, Department of Internal Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Daniel A. Bonsor
- grid.411024.20000 0001 2175 4264Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD USA
| | - Eric J. Sundberg
- grid.411024.20000 0001 2175 4264Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD USA ,grid.411024.20000 0001 2175 4264Department of Medicine, University of Maryland School of Medicine, University of Maryland, Baltimore, MD USA ,grid.411024.20000 0001 2175 4264Department of Microbiology and Immunology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD USA ,grid.189967.80000 0001 0941 6502Present Address: Department of Biochemistry, Emory University School of Medicine, Atlanta, GA USA
| | - Gerhard Wagner
- grid.38142.3c000000041936754XDepartment of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA USA
| | - Vijay K. Kuchroo
- grid.62560.370000 0004 0378 8294Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA USA
| | - Gregory A. Petsko
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
| | - Richard S. Blumberg
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA USA
| |
Collapse
|
11
|
van Sorge NM, Bonsor DA, Deng L, Lindahl E, Schmitt V, Lyndin M, Schmidt A, Nilsson OR, Brizuela J, Boero E, Sundberg EJ, van Strijp JAG, Doran KS, Singer BB, Lindahl G, McCarthy AJ. Bacterial protein domains with a novel Ig-like fold target human CEACAM receptors. EMBO J 2021; 40:e106103. [PMID: 33522633 PMCID: PMC8013792 DOI: 10.15252/embj.2020106103] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 01/19/2023] Open
Abstract
Streptococcus agalactiae, also known as group B Streptococcus (GBS), is the major cause of neonatal sepsis in humans. A critical step to infection is adhesion of bacteria to epithelial surfaces. GBS adhesins have been identified to bind extracellular matrix components and cellular receptors. However, several putative adhesins have no host binding partner characterised. We report here that surface‐expressed β protein of GBS binds to human CEACAM1 and CEACAM5 receptors. A crystal structure of the complex showed that an IgSF domain in β represents a novel Ig‐fold subtype called IgI3, in which unique features allow binding to CEACAM1. Bioinformatic assessment revealed that this newly identified IgI3 fold is not exclusively present in GBS but is predicted to be present in adhesins from other clinically important human pathogens. In agreement with this prediction, we found that CEACAM1 binds to an IgI3 domain found in an adhesin from a different streptococcal species. Overall, our results indicate that the IgI3 fold could provide a broadly applied mechanism for bacteria to target CEACAMs.
Collapse
Affiliation(s)
- Nina M van Sorge
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Daniel A Bonsor
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Liwen Deng
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Erik Lindahl
- Department of Biochemistry and Biophysics, Science for Life Laboratory, Stockholm University, Stockholm, Sweden
| | - Verena Schmitt
- Institute of Anatomy, Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - Mykola Lyndin
- Institute of Anatomy, Medical Faculty, University Duisburg-Essen, Essen, Germany.,Department of Pathology, Sumy State University, Sumy, Ukraine
| | - Alexej Schmidt
- Department of Medical Biosciences, Umeå University, Pathology, Umeå, Sweden
| | - Olof R Nilsson
- Department of Laboratory Medicine, Division of Medical Microbiology, Lund University, Lund, Sweden
| | - Jaime Brizuela
- Department of Infectious Disease, MRC Centre for Molecular Bacteriology & Infection, Imperial College London, London, UK
| | - Elena Boero
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Eric J Sundberg
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.,Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Jos A G van Strijp
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Kelly S Doran
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Bernhard B Singer
- Institute of Anatomy, Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - Gunnar Lindahl
- Department of Laboratory Medicine, Division of Medical Microbiology, Lund University, Lund, Sweden.,Department of Chemistry, Division of Applied Microbiology, Lund University, Lund, Sweden
| | - Alex J McCarthy
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Infectious Disease, MRC Centre for Molecular Bacteriology & Infection, Imperial College London, London, UK
| |
Collapse
|
12
|
Jiang W, Ubhayasekera W, Breed MC, Norsworthy AN, Serr N, Mobley HLT, Pearson MM, Knight SD. MrpH, a new class of metal-binding adhesin, requires zinc to mediate biofilm formation. PLoS Pathog 2020; 16:e1008707. [PMID: 32780778 PMCID: PMC7444556 DOI: 10.1371/journal.ppat.1008707] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 08/21/2020] [Accepted: 06/16/2020] [Indexed: 12/14/2022] Open
Abstract
Proteus mirabilis, a Gram-negative uropathogen, is a major causative agent in catheter-associated urinary tract infections (CAUTI). Mannose-resistant Proteus-like fimbriae (MR/P) are crucially important for P. mirabilis infectivity and are required for biofilm formation and auto-aggregation, as well as for bladder and kidney colonization. Here, the X-ray crystal structure of the MR/P tip adhesin, MrpH, is reported. The structure has a fold not previously described and contains a transition metal center with Zn2+ coordinated by three conserved histidine residues and a ligand. Using biofilm assays, chelation, metal complementation, and site-directed mutagenesis of the three histidines, we show that an intact metal binding site occupied by zinc is essential for MR/P fimbria-mediated biofilm formation, and furthermore, that P. mirabilis biofilm formation is reversible in a zinc-dependent manner. Zinc is also required for MR/P-dependent agglutination of erythrocytes, and mutation of the metal binding site renders P. mirabilis unfit in a mouse model of UTI. The studies presented here provide important clues as to the mechanism of MR/P-mediated biofilm formation and serve as a starting point for identifying the physiological MR/P fimbrial receptor. Many bacteria use fimbriae to adhere to surfaces, and this function is often essential for pathogens to gain a foothold in the host. In this study, we examine the major virulence-associated fimbrial protein, MrpH, of the bacterial urinary tract pathogen Proteus mirabilis. This species is particularly known for causing catheter-associated urinary tract infections, in which it forms damaging urinary stones and crystalline biofilms that can block the flow of urine through indwelling catheters. MrpH resides at the tip of mannose-resistant Proteus-like (MR/P) fimbriae and is required for MR/P-dependent adherence to surfaces. Although MR/P belongs to a well-known class of adhesive fimbriae encoded by the chaperone-usher pathway, we found that MrpH has a dramatically different structure compared with other tip-located adhesins in this family. Unexpectedly, MrpH was found to bind a zinc cation, which we show is essential for MR/P-mediated biofilm formation and adherence to red blood cells. Furthermore, MR/P-mediated adherence can be modified by controlling zinc levels. These findings have the potential to aid development of better anti-biofilm urinary catheters or other methods to prevent P. mirabilis infection of the urinary tract.
Collapse
Affiliation(s)
- Wangshu Jiang
- Department of Cell and Molecular Biology, Uppsala University, Biomedical Center, Uppsala, Sweden
| | - Wimal Ubhayasekera
- Department of Cell and Molecular Biology, Uppsala University, Biomedical Center, Uppsala, Sweden
| | - Michael C. Breed
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, United States of America
| | - Allison N. Norsworthy
- Department of Microbiology, New York University School of Medicine, New York, NY, United States of America
| | - Nina Serr
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, United States of America
| | - Harry L. T. Mobley
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, United States of America
| | - Melanie M. Pearson
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, United States of America
- * E-mail: (MMP); (SDK)
| | - Stefan D. Knight
- Department of Cell and Molecular Biology, Uppsala University, Biomedical Center, Uppsala, Sweden
- * E-mail: (MMP); (SDK)
| |
Collapse
|
13
|
Werner LM, Palmer A, Smirnov A, Belcher Dufrisne M, Columbus L, Criss AK. Imaging Flow Cytometry Analysis of CEACAM Binding to Opa-Expressing Neisseria gonorrhoeae. Cytometry A 2020; 97:1081-1089. [PMID: 32484607 DOI: 10.1002/cyto.a.24037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/04/2020] [Accepted: 04/03/2020] [Indexed: 12/31/2022]
Abstract
Human carcinoembryonic antigen-related cell adhesion molecules (CEACAMs) are a family of receptors that mediate intercellular interactions. Pathogenic bacteria have ligands that bind CEACAMs on human cells. Neisseria gonorrhoeae (Gc) encodes numerous unique outer membrane opacity-associated (Opa) proteins that are ligands for one or more CEACAMs. CEACAMs that are expressed on epithelial cells facilitate Gc colonization, while those expressed on neutrophils affect phagocytosis and consequent intracellular survival of Gc. Since Opa protein expression is phase-variable, variations in receptor tropism affect how individual bacteria within a population interact with host cells. Here we report the development of a rapid, quantitative method for collecting and analyzing fluorescence intensity data from thousands of cells in a population using imaging flow cytometry to detect N-CEACAM bound to the surface of Opa-expressing Gc. We use this method to confirm previous findings regarding Opa-CEACAM interactions and to examine the receptor-ligand interactions of Gc expressing other Opa proteins, as well as for other N-CEACAM proteins. © 2020 International Society for Advancement of Cytometry.
Collapse
Affiliation(s)
- Lacie M Werner
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, 22903, USA
| | - Allison Palmer
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, 22903, USA
| | - Asya Smirnov
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, 22903, USA
| | | | - Linda Columbus
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22903, USA
| | - Alison K Criss
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, 22903, USA
| |
Collapse
|
14
|
Kim WM, Huang YH, Gandhi A, Blumberg RS. CEACAM1 structure and function in immunity and its therapeutic implications. Semin Immunol 2020; 42:101296. [PMID: 31604530 DOI: 10.1016/j.smim.2019.101296] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 08/01/2019] [Indexed: 12/13/2022]
Abstract
The type I membrane protein receptor carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) distinctively exhibits significant alternative splicing that allows for tunable functions upon homophilic binding. CEACAM1 is highly expressed in the tumor environment and is strictly regulated on lymphocytes such that its expression is restricted to activated cells where it is now recognized to function in tolerance pathways. CEACAM1 is also an important target for microbes which have co-opted these attributes of CEACAM1 for the purposes of invading the host and evading the immune system. These properties, among others, have focused attention on CEACAM1 as a unique target for immunotherapy in autoimmunity and cancer. This review examines recent structural information derived from the characterization of CEACAM1:CEACAM1 interactions and heterophilic modes of binding especially to microbes and how this relates to CEACAM1 function. Through this, we aim to provide insights into targeting CEACAM1 for therapeutic intervention.
Collapse
Affiliation(s)
- Walter M Kim
- Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Yu-Hwa Huang
- Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Amit Gandhi
- Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Richard S Blumberg
- Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
| |
Collapse
|
15
|
Bonsignore P, Kuiper JWP, Adrian J, Goob G, Hauck CR. CEACAM3-A Prim(at)e Invention for Opsonin-Independent Phagocytosis of Bacteria. Front Immunol 2020; 10:3160. [PMID: 32117212 PMCID: PMC7026191 DOI: 10.3389/fimmu.2019.03160] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 12/31/2019] [Indexed: 01/15/2023] Open
Abstract
Phagocytosis is one of the key innate defense mechanisms executed by specialized cells in multicellular animals. Recent evidence suggests that a particular phagocytic receptor expressed by human polymorphonuclear granulocytes, the carcinoembryonic antigen-related cell adhesion molecule 3 (CEACAM3), is one of the fastest-evolving human proteins. In this focused review, we will try to resolve the conundrum why a conserved process such as phagocytosis is conducted by a rapidly changing receptor. Therefore, we will first summarize the biochemical and structural details of this immunoglobulin-related glycoprotein in the context of the human CEACAM family. The function of CEACAM3 for the efficient, opsonin-independent detection and phagocytosis of highly specialized, host-restricted bacteria will be further elaborated. Taking into account the decisive role of CEACAM3 in the interaction with pathogenic bacteria, we will discuss the evolutionary trajectory of the CEACAM3 gene within the primate lineage and highlight the consequences of CEACAM3 polymorphisms in human populations. From a synopsis of these studies, CEACAM3 emerges as an important component of human innate immunity and a prominent example of a dedicated receptor for professional phagocytosis.
Collapse
Affiliation(s)
- Patrizia Bonsignore
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Johannes W P Kuiper
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Jonas Adrian
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Griseldis Goob
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Christof R Hauck
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany.,Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany
| |
Collapse
|
16
|
Qin Y, Jiang X, Li W, Li J, Tian T, Zang G, Fang L, Zhou C, Xu B, Gong X, Huang C, Yang X, Bai M, Fan L, Xie P. Chronic mild stress leads to aberrant glucose energy metabolism in depressed Macaca fascicularis models. Psychoneuroendocrinology 2019; 107:59-69. [PMID: 31108306 DOI: 10.1016/j.psyneuen.2019.05.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 05/05/2019] [Accepted: 05/09/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND Major depressive disorder (MDD) is a pathophysiologically uncharacterized mental illness with complex etiology and clinical manifestations. Rodent depression-like models have been widely used to mimic the morbid state of depression. However, research on emotional disorders can also benefit from the use of models in non-human primates, which share a wide range of genetic and social similarities with humans. METHODS To investigate the pathophysiological mechanisms of depression, we established two models, naturally occurring depression cynomolgus (NOD) and social plus visual isolation-induced depression cynomolgus (SVC), imitating chronic mild or acute intense stress, respectively. We used i-TRAQ (isobaric tags for relative and absolute quantitation)-based quantitative proteomics and shotgun proteomics to identify differentially expressed proteins in cerebrospinal fluid (CSF) of the two monkey models and human MDD patients. We also used DAVID and ingenuity pathway analysis (IPA) for further bioinformatic investigation. RESULTS In behavioral tests, NOD monkeys achieved higher scores in depression-like and anxiety-like behavioral measures, and spent more time on ingesting, thermoregulatory, and locomotive actions than SVC monkeys. A total of 902 proteins were identified by i-TRAQ, and 40 differentially expressed proteins were identified in each of the NOD-CON1 and SVC-CON2 groups. Application of DAVID revealed dysregulation of energy metabolism in the NOD group, whereas lipid metabolism and inflammatory response pathways were significantly altered in the SVC group. Use of IPA and Cytoscape showed that the oxygen species metabolic process glycolysis I/gluconeogenesis I, accompanied by downregulation of tubulin beta 3 class III (TUBB3), RAC-alpha serine/threonine-protein kinase (AKT1), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH), was the most significantly affected pathway in the NOD group. Furthermore, 152 differentially expressed proteins in human MDD patients also revealed disruption of glucose energy metabolism. Significantly aberrant energy metabolism in various brain regions and the plasma and liver of chronic unpredictable mild stress rodent samples were also observed in a previous study. CONCLUSIONS Our results reveal for the first time the overall CSF protein profiles of two cynomolgus monkey models of depression. We propose that chronic mild stress may affect the disruption of glucose energy metabolism in NOD cynomolgus monkeys and rodents. These findings promote our understanding of the pathophysiology of MDD and may help to identify novel therapeutic targets.
Collapse
Affiliation(s)
- Yinhua Qin
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Key Laboratory of Laboratory Medical Diagnostics of Education, Department of Laboratory Medicine, Chongqing 400016, China
| | - XiaoFeng Jiang
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wei Li
- Department of Neurology, Army Medical Center of PLA, Chongqing 400042, China
| | - Jie Li
- Clinical Medicine Research Center, Dazhou Central Hospital, Sichuan 635000, China
| | - Tian Tian
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Guangchao Zang
- Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center of Chongqing Medical University, Chongqing 400016, China
| | - Liang Fang
- Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing 402460, China
| | - Chanjuan Zhou
- Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing 402460, China
| | - Bin Xu
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Xue Gong
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Cheng Huang
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Xun Yang
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Mengge Bai
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Key Laboratory of Laboratory Medical Diagnostics of Education, Department of Laboratory Medicine, Chongqing 400016, China
| | - Li Fan
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Peng Xie
- Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing 400016, China; Chongqing Key Laboratory of Neurobiology, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
| |
Collapse
|
17
|
Chen H, Zhao X, Xi Z, Zhang Y, Li H, Li Z, Shi H, Huang L, Shen R, Tao J, Wang T. A new biosensor detection system to overcome the Debye screening effect: dialysis-silicon nanowire field effect transistor. Int J Nanomedicine 2019; 14:2985-2993. [PMID: 31118617 PMCID: PMC6505467 DOI: 10.2147/ijn.s198734] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/12/2019] [Indexed: 12/14/2022] Open
Abstract
Background: A silicon nanowire field effect transistor biosensor has four advantages in the detection of small biomolecules. It is mark-free, immediately responsive, highly sensitive, and specific. However, because of environments with a high salt concentration, the Debye screening effect has been a major issue in biological detection. Objective: To overcome Debye screening effect, realize the clinical application of silicon nanowire field effect transistor and verify its specificity and sensitivity. Materials and methods: The test solution was desalted by miniature blood dialyzer, and then the tumor markers were detected by silicon nanowire field effect transistor. Results: Tumor markers in serum were detected successfully and their sensitivity and specificity were verified. Conclusion: This method was found to effectively promote the development of semiconductor materials in biological solution detection.
Collapse
Affiliation(s)
- Hang Chen
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Xiaoqian Zhao
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Zhong Xi
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Ye Zhang
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Hang Li
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Zengyao Li
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Haoze Shi
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Longchang Huang
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Renhui Shen
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Jianxin Tao
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| | - Tong Wang
- Department of General Surgery, Nanjing Medical University Affiliated Wuxi People's Hospital, Wuxi, Jiangsu Province, People's Republic of China
| |
Collapse
|
18
|
Size-Dependent Segregation Controls Macrophage Phagocytosis of Antibody-Opsonized Targets. Cell 2019; 174:131-142.e13. [PMID: 29958103 DOI: 10.1016/j.cell.2018.05.059] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/20/2018] [Accepted: 05/29/2018] [Indexed: 12/18/2022]
Abstract
Macrophages protect the body from damage and disease by targeting antibody-opsonized cells for phagocytosis. Though antibodies can be raised against antigens with diverse structures, shapes, and sizes, it is unclear why some are more effective at triggering immune responses than others. Here, we define an antigen height threshold that regulates phagocytosis of both engineered and cancer-specific antigens by macrophages. Using a reconstituted model of antibody-opsonized target cells, we find that phagocytosis is dramatically impaired for antigens that position antibodies >10 nm from the target surface. Decreasing antigen height drives segregation of antibody-bound Fc receptors from the inhibitory phosphatase CD45 in an integrin-independent manner, triggering Fc receptor phosphorylation and promoting phagocytosis. Our work shows that close contact between macrophage and target is a requirement for efficient phagocytosis, suggesting that therapeutic antibodies should target short antigens in order to trigger Fc receptor activation through size-dependent physical segregation.
Collapse
|
19
|
Wang QL, Cui HF, Du JF, Lv QY, Song X. In silicopost-SELEX screening and experimental characterizations for acquisition of high affinity DNA aptamers against carcinoembryonic antigen. RSC Adv 2019; 9:6328-6334. [PMID: 35517255 PMCID: PMC9060916 DOI: 10.1039/c8ra10163a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 02/11/2019] [Indexed: 11/21/2022] Open
Abstract
High affinity DNA aptamers against carcinoembryonic antigen were selected and verified by using anin silicoapproach and experimental characterizations.
Collapse
Affiliation(s)
- Qiong-Lin Wang
- Department of Bioengineering
- School of Life Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Hui-Fang Cui
- Department of Bioengineering
- School of Life Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Jiang-Feng Du
- Department of Bioengineering
- School of Life Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Qi-Yan Lv
- Department of Bioengineering
- School of Life Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Xiaojie Song
- Department of Bioengineering
- School of Life Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| |
Collapse
|
20
|
Moonens K, Hamway Y, Neddermann M, Reschke M, Tegtmeyer N, Kruse T, Kammerer R, Mejías-Luque R, Singer BB, Backert S, Gerhard M, Remaut H. Helicobacter pylori adhesin HopQ disrupts trans dimerization in human CEACAMs. EMBO J 2018; 37:embj.201798665. [PMID: 29858229 DOI: 10.15252/embj.201798665] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 05/08/2018] [Accepted: 05/15/2018] [Indexed: 01/24/2023] Open
Abstract
The human gastric pathogen Helicobacter pylori is a major causative agent of gastritis, peptic ulcer disease, and gastric cancer. As part of its adhesive lifestyle, the bacterium targets members of the carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family by the conserved outer membrane adhesin HopQ. The HopQ-CEACAM1 interaction is associated with inflammatory responses and enables the intracellular delivery and phosphorylation of the CagA oncoprotein via a yet unknown mechanism. Here, we generated crystal structures of HopQ isotypes I and II bound to the N-terminal domain of human CEACAM1 (C1ND) and elucidated the structural basis of H. pylori specificity toward human CEACAM receptors. Both HopQ alleles target the β-strands G, F, and C of C1ND, which form the trans dimerization interface in homo- and heterophilic CEACAM interactions. Using SAXS, we show that the HopQ ectodomain is sufficient to induce C1ND monomerization and thus providing H. pylori a route to influence CEACAM-mediated cell adherence and signaling events.
Collapse
Affiliation(s)
- Kristof Moonens
- Structural and Molecular Microbiology, Structural Biology Research Center, VIB, Brussels, Belgium.,Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| | - Youssef Hamway
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany
| | - Matthias Neddermann
- Division of Microbiology, Department of Biology, Friedrich Alexander University Erlangen, Erlangen, Germany
| | - Marc Reschke
- Institute of Anatomy, Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Nicole Tegtmeyer
- Division of Microbiology, Department of Biology, Friedrich Alexander University Erlangen, Erlangen, Germany
| | | | - Robert Kammerer
- Institute of Immunology, Friedrich-Loeffler Institut, Greifswald-Insel Riems, Germany
| | - Raquel Mejías-Luque
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany
| | - Bernhard B Singer
- Institute of Anatomy, Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Steffen Backert
- Division of Microbiology, Department of Biology, Friedrich Alexander University Erlangen, Erlangen, Germany
| | - Markus Gerhard
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany
| | - Han Remaut
- Structural and Molecular Microbiology, Structural Biology Research Center, VIB, Brussels, Belgium .,Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| |
Collapse
|
21
|
Bonsor DA, Zhao Q, Schmidinger B, Weiss E, Wang J, Deredge D, Beadenkopf R, Dow B, Fischer W, Beckett D, Wintrode PL, Haas R, Sundberg EJ. The Helicobacter pylori adhesin protein HopQ exploits the dimer interface of human CEACAMs to facilitate translocation of the oncoprotein CagA. EMBO J 2018; 37:embj.201798664. [PMID: 29724755 DOI: 10.15252/embj.201798664] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 03/27/2018] [Accepted: 04/05/2018] [Indexed: 01/06/2023] Open
Abstract
Helicobacter pylori infects half of the world's population, and strains that encode the cag type IV secretion system for injection of the oncoprotein CagA into host gastric epithelial cells are associated with elevated levels of cancer. CagA translocation into host cells is dependent on interactions between the H. pylori adhesin protein HopQ and human CEACAMs. Here, we present high-resolution structures of several HopQ-CEACAM complexes and CEACAMs in their monomeric and dimeric forms establishing that HopQ uses a coupled folding and binding mechanism to engage the canonical CEACAM dimerization interface for CEACAM recognition. By combining mutagenesis with biophysical and functional analyses, we show that the modes of CEACAM recognition by HopQ and CEACAMs themselves are starkly different. Our data describe precise molecular mechanisms by which microbes exploit host CEACAMs for infection and enable future development of novel oncoprotein translocation inhibitors and H. pylori-specific antimicrobial agents.
Collapse
Affiliation(s)
- Daniel A Bonsor
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Qing Zhao
- Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Barbara Schmidinger
- Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Evelyn Weiss
- Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Jingheng Wang
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA
| | - Daniel Deredge
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, USA
| | - Robert Beadenkopf
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Blaine Dow
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Wolfgang Fischer
- Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Dorothy Beckett
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA
| | - Patrick L Wintrode
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, USA
| | - Rainer Haas
- Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany.,German Center for Infection Research (DZIF), Partner Site LMU, Munich, Germany
| | - Eric J Sundberg
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA .,Department of Medicine, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.,Department of Microbiology and Immunology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA
| |
Collapse
|
22
|
Moonens K, Remaut H. Evolution and structural dynamics of bacterial glycan binding adhesins. Curr Opin Struct Biol 2017; 44:48-58. [DOI: 10.1016/j.sbi.2016.12.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/30/2016] [Accepted: 12/05/2016] [Indexed: 01/25/2023]
|
23
|
Helicobacter pylori exploits human CEACAMs via HopQ for adherence and translocation of CagA. Nat Microbiol 2016; 2:16188. [PMID: 27748756 DOI: 10.1038/nmicrobiol.2016.188] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 08/31/2016] [Indexed: 12/12/2022]
Abstract
Helicobacter pylori (Hp) strains that carry the cag type IV secretion system (cag-T4SS) to inject the cytotoxin-associated antigen A (CagA) into host cells are associated with peptic ulcer disease and gastric adenocarcinoma. CagA translocation by Hp is mediated by β1 integrin interaction of the cag-T4SS. However, other cellular receptors or bacterial outer membrane adhesins essential for this process are unknown. Here, we identify the HopQ protein as a genuine Hp adhesin, exploiting defined members of the carcinoembryonic antigen-related cell adhesion molecule family (CEACAMs) as host cell receptors. HopQ binds the amino-terminal IgV-like domain of human CEACAM1, CEACAM3, CEACAM5 or CEACAM6 proteins, thereby enabling translocation of the major pathogenicity factor CagA into host cells. The HopQ-CEACAM interaction is characterized by a remarkably high affinity (KD from 23 to 268 nM), which is independent of CEACAM glycosylation, identifying CEACAMs as bona fide protein receptors for Hp. Our data suggest that the HopQ-CEACAM interaction contributes to gastric colonization or Hp-induced pathologies, although the precise role and functional consequences of this interaction in vivo remain to be determined.
Collapse
|
24
|
Lee WC, Matthews S, Garnett JA. Crystal structure and analysis of HdaB: The enteroaggregative Escherichia coli AAF/IV pilus tip protein. Protein Sci 2016; 25:1898-905. [PMID: 27400770 PMCID: PMC5029526 DOI: 10.1002/pro.2982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/29/2016] [Accepted: 07/05/2016] [Indexed: 11/09/2022]
Abstract
Enteroaggregative Escherichia coli is the primary cause of pediatric diarrhea in developing countries. They utilize aggregative adherence fimbriae (AAFs) to promote initial adherence to the host intestinal mucosa, promote the formation of biofilms, and mediate host invasion. Five AAFs have been identified to date and AAF/IV is amongst the most prevalent found in clinical isolates. Here we present the X‐ray crystal structure of the AAF/IV tip protein HdaB at 2.0 Å resolution. It shares high structural homology with members of the Afa/Dr superfamily of fimbriae, which are involved in host invasion. We highlight surface exposed residues that share sequence homology and propose that these may function in invasion and also non‐conserved regions that could mediate HdaB specific adhesive functions. PDB Code(s): 5D55
Collapse
Affiliation(s)
- Wei-Chao Lee
- Department of Life Sciences, Centre for Structural Biology, Imperial College London, South Kensington, London, SW7 2AZ, United Kingdom
| | - Steve Matthews
- Department of Life Sciences, Centre for Structural Biology, Imperial College London, South Kensington, London, SW7 2AZ, United Kingdom
| | - James A Garnett
- School of Biological and Chemical Sciences, Queen Mary University London, London, E1 4NS, United Kingdom.
| |
Collapse
|
25
|
Martin JN, Ball LM, Solomon TL, Dewald AH, Criss AK, Columbus L. Neisserial Opa Protein-CEACAM Interactions: Competition for Receptors as a Means of Bacterial Invasion and Pathogenesis. Biochemistry 2016; 55:4286-94. [PMID: 27442026 DOI: 10.1021/acs.biochem.6b00124] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Carcino-embryonic antigen-like cellular adhesion molecules (CEACAMs), members of the immunoglobulin superfamily, are responsible for cell-cell interactions and cellular signaling events. Extracellular interactions with CEACAMs have the potential to induce phagocytosis, as is the case with pathogenic Neisseria bacteria. Pathogenic Neisseria species express opacity-associated (Opa) proteins, which interact with a subset of CEACAMs on human cells, and initiate the engulfment of the bacterium. We demonstrate that recombinant Opa proteins reconstituted into liposomes retain the ability to recognize and interact with CEACAMs in vitro but do not maintain receptor specificity compared to that of Opa proteins natively expressed by Neisseria gonorrhoeae. We report that two Opa proteins interact with CEACAMs with nanomolar affinity, and we hypothesize that this high affinity is necessary to compete with the native CEACAM homo- and heterotypic interactions in the host. Understanding the mechanisms of Opa protein-receptor recognition and engulfment enhances our understanding of Neisserial pathogenesis. Additionally, these mechanisms provide insight into how human cells that are typically nonphagocytic can utilize CEACAM receptors to internalize exogenous matter, with implications for the targeted delivery of therapeutics and development of imaging agents.
Collapse
Affiliation(s)
- Jennifer N Martin
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| | - Louise M Ball
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| | - Tsega L Solomon
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| | - Alison H Dewald
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| | - Alison K Criss
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| | - Linda Columbus
- Department of Chemistry and ‡Department of Microbiology, Immunology, and Cancer Biology, University of Virginia , Charlottesville, Virginia 22903, United States
| |
Collapse
|
26
|
Zhuo Y, Yang JY, Moremen KW, Prestegard JH. Glycosylation Alters Dimerization Properties of a Cell-surface Signaling Protein, Carcinoembryonic Antigen-related Cell Adhesion Molecule 1 (CEACAM1). J Biol Chem 2016; 291:20085-95. [PMID: 27471271 DOI: 10.1074/jbc.m116.740050] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Indexed: 12/12/2022] Open
Abstract
Human carcinoembryonic antigen-related cell adhesion molecule 1 (C?/Au: EACAM1) is a cell-surface signaling molecule involved in cell adhesion, proliferation, and immune response. It is also implicated in cancer angiogenesis, progression, and metastasis. This diverse set of effects likely arises as a result of the numerous homophilic and heterophilic interactions that CEACAM1 can have with itself and other molecules. Its N-terminal Ig variable (IgV) domain has been suggested to be a principal player in these interactions. Previous crystal structures of the β-sandwich-like IgV domain have been produced using Escherichia coli-expressed material, which lacks native glycosylation. These have led to distinctly different proposals for dimer interfaces, one involving interactions of ABED β-strands and the other involving GFCC'C″ β-strands, with the former burying one prominent glycosylation site. These structures raise questions as to which form may exist in solution and what the effect of glycosylation may have on this form. Here, we use NMR cross-correlation measurements to examine the effect of glycosylation on CEACAM1-IgV dimerization and use residual dipolar coupling (RDC) measurements to characterize the solution structure of the non-glycosylated form. Our findings demonstrate that even addition of a single N-linked GlcNAc at potential glycosylation sites inhibits dimer formation. Surprisingly, RDC data collected on E. coli expressed material in solution indicate that a dimer using the non-glycosylated GFCC'C″ interface is preferred even in the absence of glycosylation. The results open new questions about what other factors may facilitate dimerization of CEACAM1 in vivo, and what roles glycosylation may play in heterophylic interactions.
Collapse
Affiliation(s)
- You Zhuo
- From the Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| | - Jeong-Yeh Yang
- From the Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| | - Kelley W Moremen
- From the Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| | - James H Prestegard
- From the Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| |
Collapse
|
27
|
Muenzner P, Kengmo Tchoupa A, Klauser B, Brunner T, Putze J, Dobrindt U, Hauck CR. Uropathogenic E. coli Exploit CEA to Promote Colonization of the Urogenital Tract Mucosa. PLoS Pathog 2016; 12:e1005608. [PMID: 27171273 PMCID: PMC4865239 DOI: 10.1371/journal.ppat.1005608] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 04/11/2016] [Indexed: 11/18/2022] Open
Abstract
Attachment to the host mucosa is a key step in bacterial pathogenesis. On the apical surface of epithelial cells, members of the human carcinoembryonic antigen (CEA) family are abundant glycoproteins involved in cell-cell adhesion and modulation of cell signaling. Interestingly, several gram-negative bacterial pathogens target these receptors by specialized adhesins. The prototype of a CEACAM-binding pathogen, Neisseria gonorrhoeae, utilizes colony opacity associated (Opa) proteins to engage CEA, as well as the CEA-related cell adhesion molecules CEACAM1 and CEACAM6 on human epithelial cells. By heterologous expression of neisserial Opa proteins in non-pathogenic E. coli we find that the Opa protein-CEA interaction is sufficient to alter gene expression, to increase integrin activity and to promote matrix adhesion of infected cervical carcinoma cells and immortalized vaginal epithelial cells in vitro. These CEA-triggered events translate in suppression of exfoliation and improved colonization of the urogenital tract by Opa protein-expressing E. coli in CEA-transgenic compared to wildtype mice. Interestingly, uropathogenic E. coli expressing an unrelated CEACAM-binding protein of the Afa/Dr adhesin family recapitulate the in vitro and in vivo phenotype. In contrast, an isogenic strain lacking the CEACAM-binding adhesin shows reduced colonization and does not suppress epithelial exfoliation. These results demonstrate that engagement of human CEACAMs by distinct bacterial adhesins is sufficient to blunt exfoliation and to promote host infection. Our findings provide novel insight into mucosal colonization by a common UPEC pathotype and help to explain why human CEACAMs are a preferred epithelial target structure for diverse gram-negative bacteria to establish a foothold on the human mucosa. Mucous surfaces are a hallmark of the nasal cavity and the throat as well as the intestinal and urogenital tracts. These surfaces serve as primary entry portals for a large number of pathogenic bacteria. To get a foothold on the mucosa, bacteria not only need to tightly attach to this tissue, but also need to overcome an intrinsic defence mechanism called exfoliation. During the exfoliation process, the outermost cell layer, together with attached bacteria, is released from the tissue surface reducing the microbial burden. A comprehensive understanding of the molecular strategies, which bacteria utilize to undermine this host defence, is currently lacking. Our results suggest that different bacterial pathogens have found a surprisingly similar answer to this problem by targeting a common set of proteins on the tissue surface. Accordingly, these bacteria express unrelated proteins that engage the same host receptors called CEA-related cell adhesion molecules (CEACAMs). Binding of microbes to CEACAMs triggers, via intracellular signaling pathways, an increased stickiness of the infected cells. Thereby, the pathogens suppress the release of superficial host cells from the tissue and effectively block exfoliation. Detailed mechanistic insight into this process and the ability to manipulate exfoliation might help to prevent or treat bacterial infections.
Collapse
Affiliation(s)
- Petra Muenzner
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Arnaud Kengmo Tchoupa
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Benedikt Klauser
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Thomas Brunner
- Lehrstuhl Biochemische Pharmakologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
| | - Johannes Putze
- Institut für Hygiene, Universität Münster, Münster, Germany
| | | | - Christof R. Hauck
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany
- Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany
- * E-mail:
| |
Collapse
|
28
|
Bonsor DA, Günther S, Beadenkopf R, Beckett D, Sundberg EJ. Diverse oligomeric states of CEACAM IgV domains. Proc Natl Acad Sci U S A 2015; 112:13561-6. [PMID: 26483485 PMCID: PMC4640789 DOI: 10.1073/pnas.1509511112] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Carcinoembryonic antigen-related cell adhesion molecules (CEACAMs) comprise a large family of cell surface adhesion molecules that bind to themselves and other family members to carry out numerous cellular functions, including proliferation, signaling, differentiation, tumor suppression, and survival. They also play diverse and significant roles in immunity and infection. The formation of CEACAM oligomers is caused predominantly by interactions between their N-terminal IgV domains. Although X-ray crystal structures of CEACAM IgV domain homodimers have been described, how CEACAMs form heterodimers or remain monomers is poorly understood. To address this key aspect of CEACAM function, we determined the crystal structures of IgV domains that form a homodimeric CEACAM6 complex, monomeric CEACAM8, and a heterodimeric CEACAM6-CEACAM8 complex. To confirm and quantify these interactions in solution, we used analytical ultracentrifugation to measure the dimerization constants of CEACAM homodimers and isothermal titration calorimetry to determine the thermodynamic parameters and binding affinities of CEACAM heterodimers. We found the CEACAM6-CEACAM8 heterodimeric state to be substantially favored energetically relative to the CEACAM6 homodimer. Our data provide a molecular basis for the adoption of the diverse oligomeric states known to exist for CEACAMs and suggest ways in which CEACAM6 and CEACAM8 regulate the biological functions of one another, as well as of additional CEACAMs with which they interact, both in cis and in trans.
Collapse
Affiliation(s)
- Daniel A Bonsor
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Sebastian Günther
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Robert Beadenkopf
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Dorothy Beckett
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742
| | - Eric J Sundberg
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201; Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201; Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201
| |
Collapse
|
29
|
Bonsor DA, Beckett D, Sundberg EJ. Structure of the N-terminal dimerization domain of CEACAM7. Acta Crystallogr F Struct Biol Commun 2015; 71:1169-75. [PMID: 26323304 PMCID: PMC4555925 DOI: 10.1107/s2053230x15013576] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 07/15/2015] [Indexed: 11/22/2022] Open
Abstract
CEACAM7 is a human cellular adhesion protein that is expressed on the surface of colon and rectum epithelial cells and is downregulated in colorectal cancers. It achieves cell adhesion through dimerization of the N-terminal IgV domain. The crystal structure of the N-terminal dimerization domain of CEACAM has been determined at 1.47 Å resolution. The overall fold of CEACAM7 is similar to those of CEACAM1 and CEACAM5; however, there are differences, the most notable of which is an insertion that causes the C'' strand to buckle, leading to the creation of a hydrogen bond in the dimerization interface. The Kdimerization for CEACAM7 determined by sedimentation equilibrium is tenfold tighter than that measured for CEACAM5. These findings suggest that the dimerization affinities of CEACAMs are modulated via sequence variation in the dimerization surface.
Collapse
Affiliation(s)
- Daniel A. Bonsor
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Dorothy Beckett
- Department of Chemistry and Biochemistry, University of Maryland College Park, Baltimore, MD 20742, USA
| | - Eric J. Sundberg
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| |
Collapse
|
30
|
Pathogenesis of human diffusely adhering Escherichia coli expressing Afa/Dr adhesins (Afa/Dr DAEC): current insights and future challenges. Clin Microbiol Rev 2015; 27:823-69. [PMID: 25278576 DOI: 10.1128/cmr.00036-14] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The pathogenicity and clinical pertinence of diffusely adhering Escherichia coli expressing the Afa/Dr adhesins (Afa/Dr DAEC) in urinary tract infections (UTIs) and pregnancy complications are well established. In contrast, the implication of intestinal Afa/Dr DAEC in diarrhea is still under debate. These strains are age dependently involved in diarrhea in children, are apparently not involved in diarrhea in adults, and can also be asymptomatic intestinal microbiota strains in children and adult. This comprehensive review analyzes the epidemiology and diagnosis and highlights recent progress which has improved the understanding of Afa/Dr DAEC pathogenesis. Here, I summarize the roles of Afa/Dr DAEC virulence factors, including Afa/Dr adhesins, flagella, Sat toxin, and pks island products, in the development of specific mechanisms of pathogenicity. In intestinal epithelial polarized cells, the Afa/Dr adhesins trigger cell membrane receptor clustering and activation of the linked cell signaling pathways, promote structural and functional cell lesions and injuries in intestinal barrier, induce proinflammatory responses, create angiogenesis, instigate epithelial-mesenchymal transition-like events, and lead to pks-dependent DNA damage. UTI-associated Afa/Dr DAEC strains, following adhesin-membrane receptor cell interactions and activation of associated lipid raft-dependent cell signaling pathways, internalize in a microtubule-dependent manner within urinary tract epithelial cells, develop a particular intracellular lifestyle, and trigger a toxin-dependent cell detachment. In response to Afa/Dr DAEC infection, the host epithelial cells generate antibacterial defense responses. Finally, I discuss a hypothetical role of intestinal Afa/Dr DAEC strains that can act as "silent pathogens" with the capacity to emerge as "pathobionts" for the development of inflammatory bowel disease and intestinal carcinogenesis.
Collapse
|
31
|
Structural insight into host recognition by aggregative adherence fimbriae of enteroaggregative Escherichia coli. PLoS Pathog 2014; 10:e1004404. [PMID: 25232738 PMCID: PMC4169507 DOI: 10.1371/journal.ppat.1004404] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 08/15/2014] [Indexed: 11/19/2022] Open
Abstract
Enteroaggregative Escherichia coli (EAEC) is a leading cause of acute and persistent diarrhea worldwide. A recently emerged Shiga-toxin-producing strain of EAEC resulted in significant mortality and morbidity due to progressive development of hemolytic-uremic syndrome. The attachment of EAEC to the human intestinal mucosa is mediated by aggregative adherence fimbria (AAF). Using X-ray crystallography and NMR structures, we present new atomic resolution insight into the structure of AAF variant I from the strain that caused the deadly outbreak in Germany in 2011, and AAF variant II from archetype strain 042, and propose a mechanism for AAF-mediated adhesion and biofilm formation. Our work shows that major subunits of AAF assemble into linear polymers by donor strand complementation where a single minor subunit is inserted at the tip of the polymer by accepting the donor strand from the terminal major subunit. Whereas the minor subunits of AAF have a distinct conserved structure, AAF major subunits display large structural differences, affecting the overall pilus architecture. These structures suggest a mechanism for AAF-mediated adhesion and biofilm formation. Binding experiments using wild type and mutant subunits (NMR and SPR) and bacteria (ELISA) revealed that despite the structural differences AAF recognize a common receptor, fibronectin, by employing clusters of basic residues at the junction between subunits in the pilus. We show that AAF-fibronectin attachment is based primarily on electrostatic interactions, a mechanism not reported previously for bacterial adhesion to biotic surfaces. Enteroaggregative Escherichia coli (EAEC) is a major cause of diarrhea worldwide and is commonly present as an infection in symptomatic travelers returning from developing countries. The attachment of EAEC to the human intestine is mediated protein filaments extending from the bacterial surface known as aggregative adherence fimbria (AAF). Here we use X-ray crystallography and nuclear magnetic resonance (NMR) structures to provide an atomic structure of the protein fibers made by the two major variants, AAF/I and AAF/II. The structures of the major subunit proteins show that the AAFs assemble into flexible, linear polymers that are capped by a single minor protein subunit at the tip. Biochemical assays reveal that the AAFs recognize a common receptor, the extracellular matrix protein fibronectin, via clusters of positively-charged amino acid residues running along the length of the fimbriae. Our structures suggest a unique mechanism based on ionic interactions for AAF-mediated receptor binding and biofilm formation.
Collapse
|
32
|
Abdul-Wahid A, Huang EHB, Cydzik M, Bolewska-Pedyczak E, Gariépy J. The carcinoembryonic antigen IgV-like N domain plays a critical role in the implantation of metastatic tumor cells. Mol Oncol 2013; 8:337-50. [PMID: 24388361 DOI: 10.1016/j.molonc.2013.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 12/06/2013] [Indexed: 01/06/2023] Open
Abstract
The human carcinoembryonic antigen (CEA) is a cell adhesion molecule involved in both homotypic and heterotypic interactions. The aberrant overexpression of CEA on adenocarcinoma cells correlates with their increased metastatic potential. Yet, the mechanism(s) by which its adhesive properties can lead to the implantation of circulating tumor cells and expansion of metastatic foci remains to be established. In this study, we demonstrate that the IgV-like N terminal domain of CEA directly participates in the implantation of cancer cells through its homotypic and heterotypic binding properties. Specifically, we determined that the recombinant N terminal domain of CEA directly binds to fibronectin (Fn) with a dissociation constant in the nanomolar range (K(D) 16 ± 3 nM) and interacts with itself (K(D) 100 ± 17 nM) and more tightly to the IgC-like A(3) domain (K(D) 18 ± 3 nM). Disruption of these molecular associations through the addition of antibodies specific to the CEA N or A(3)B(3) domains, or by adding soluble recombinant forms of the CEA N, A(3) or A(3)B(3) domains or a peptide corresponding to residues 108-115 of CEA resulted in the inhibition of CEA-mediated intercellular aggregation and adherence events in vitro. Finally, pretreating CEA-expressing murine colonic carcinoma cells (MC38.CEA) with rCEA N, A3 or A(3)B(3) modules blocked their implantation and the establishment of tumor foci in vivo. Together, these results suggest a new mechanistic insight into how the CEA IgV-like N domain participates in cellular events that can have a macroscopic impact in terms of cancer progression and metastasis.
Collapse
Affiliation(s)
- Aws Abdul-Wahid
- Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario, Canada M4N 3M5; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Department of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Eric H-B Huang
- Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario, Canada M4N 3M5
| | - Marzena Cydzik
- Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario, Canada M4N 3M5; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Department of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario, Canada
| | | | - Jean Gariépy
- Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario, Canada M4N 3M5; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Department of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario, Canada.
| |
Collapse
|
33
|
Lu Z, Bergeron JRC, Atkinson RA, Schaller T, Veselkov DA, Oregioni A, Yang Y, Matthews SJ, Malim MH, Sanderson MR. Insight into the HIV-1 Vif SOCS-box-ElonginBC interaction. Open Biol 2013; 3:130100. [PMID: 24225024 PMCID: PMC3843819 DOI: 10.1098/rsob.130100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The HIV-1 viral infectivity factor (Vif) neutralizes cell-encoded antiviral APOBEC3 proteins by recruiting a cellular ElonginB (EloB)/ElonginC (EloC)/Cullin5-containing ubiquitin ligase complex, resulting in APOBEC3 ubiquitination and proteolysis. The suppressors-of-cytokine-signalling-like domain (SOCS-box) of HIV-1 Vif is essential for E3 ligase engagement, and contains a BC box as well as an unusual proline-rich motif. Here, we report the NMR solution structure of the Vif SOCS–ElonginBC (EloBC) complex. In contrast to SOCS-boxes described in other proteins, the HIV-1 Vif SOCS-box contains only one α-helical domain followed by a β-sheet fold. The SOCS-box of Vif binds primarily to EloC by hydrophobic interactions. The functionally essential proline-rich motif mediates a direct but weak interaction with residues 101–104 of EloB, inducing a conformational change from an unstructured state to a structured state. The structure of the complex and biophysical studies provide detailed insight into the function of Vif's proline-rich motif and reveal novel dynamic information on the Vif–EloBC interaction.
Collapse
Affiliation(s)
- Zhisheng Lu
- Randall Division of Cell and Molecular Biophysics, King's College London, 3rd Floor, New Hunt's House, Guy's Campus, London Bridge, London SE1 1UL, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Biochemical characteristic of biofilm of uropathogenic Escherichia coli Dr + strains. Microbiol Res 2013; 168:367-378. [DOI: 10.1016/j.micres.2013.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 12/21/2012] [Accepted: 01/02/2013] [Indexed: 11/18/2022]
|
35
|
Orava EW, Abdul-Wahid A, Huang EHB, Mallick AI, Gariépy J. Blocking the attachment of cancer cells in vivo with DNA aptamers displaying anti-adhesive properties against the carcinoembryonic antigen. Mol Oncol 2013; 7:799-811. [PMID: 23656757 DOI: 10.1016/j.molonc.2013.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 03/27/2013] [Accepted: 03/31/2013] [Indexed: 01/28/2023] Open
Abstract
The formation of metastatic foci occurs through a series of cellular events, initiated by the attachment and aggregation of cancer cells leading to the establishment of micrometastases. We report the derivation of synthetic DNA aptamers bearing anti-adhesive properties directed at cancer cells expressing the carcinoembryonic antigen (CEA). Two DNA aptamers targeting the homotypic and heterotypic IgV-like binding domain of CEA were shown to block the cell adhesion properties of CEA, while not recognizing other IgV-like domains of CEACAM family members that share strong sequence and structural homologies. More importantly, the pre-treatment of CEA-expressing tumour cells with these aptamers prior to their intraperitoneal implantation resulted in the prevention of peritoneal tumour foci formation. Taken together, these results highlight the effectiveness of targeting the cell adhesion properties of cancer cells with aptamers in preventing tumour implantation.
Collapse
Affiliation(s)
- Erik W Orava
- Department of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario, Canada
| | | | | | | | | |
Collapse
|
36
|
Zav’yalov VP. POLYADHESINS: AN ARMORY OF GRAM--NEGATIVE PATHOGENS FOR PENETRATION THROUGH THE IMMUNE SHIELD. BIOTECHNOLOGIA ACTA 2013. [DOI: 10.15407/biotech6.04.144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
37
|
Palermo NY, Thomas P, Murphy RF, Lovas S. Hexapeptide fragment of carcinoembryonic antigen which acts as an agonist of heterogeneous ribonucleoprotein M. J Pept Sci 2012; 18:252-60. [PMID: 22392880 DOI: 10.1002/psc.2393] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 12/08/2011] [Accepted: 12/12/2011] [Indexed: 12/15/2022]
Abstract
Colorectal cancers with metastatic potential secrete the glycoprotein carcinoembryonic antigen (CEA). CEA has been implicated in colorectal cancer metastasis by inducing Kupffer cells to produce inflammatory cytokines which, in turn, make the hepatic micro-environment ideal for tumor cell implantation. CEA binds to the heterogeneous ribonucleoprotein M (hnRNP M) which acts as a cell surface receptor in Kupffer cells. The amino acid sequence in CEA, which binds the hnRNP M receptor, is Tyr-Pro-Glu-Leu-Pro-Lys. In this study, the structure of Ac-Tyr-Pro-Glu-Leu-Pro-Lys-NH₂ (YPELPK) was investigated using electronic circular dichroism, vibrational circular dichroism, and molecular dynamics simulations. The binding of the peptide to hnRNP M was also investigated using molecular docking calculations. The biological activity of YPELPK was studied using differentiated human THP-1 cells, which express hnRNP M on their surface and secrete IL-6 when stimulated by CEA. YPELPK forms a stable polyproline-II helix and stimulates IL-6 production of THP-1 cells at micromolar concentrations.
Collapse
Affiliation(s)
- Nicholas Y Palermo
- Departments of Biomedical Sciences, Creighton University, Omaha, NE 68178, USA
| | | | | | | |
Collapse
|
38
|
Fimbrial Polyadhesins: Anti-immune Armament of Yersinia. ADVANCES IN YERSINIA RESEARCH 2012; 954:183-201. [DOI: 10.1007/978-1-4614-3561-7_24] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
39
|
Czepczyńska-Krężel H, Czerwinski M, Krężel A, Krop-Watorek A. Isolation of carcinoembryonic antigen N-terminal domains (N-A1) from soluble aggregates. Protein Expr Purif 2011; 78:78-85. [PMID: 21458574 DOI: 10.1016/j.pep.2011.03.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Revised: 03/24/2011] [Accepted: 03/25/2011] [Indexed: 11/16/2022]
Abstract
Carcinoembryonic antigen (CEA) was identified as a prominent tumor-associated antigen in human colorectal cancer and it is still intensively investigated. However, its physiological role remains unclear. The CEA molecule is composed of seven highly hydrophobic, immunoglobulin-like domains, six of which contain a single disulphide bridge. The production of recombinant protein containing Ig-like domains in bacterial expression systems often results in partial degradation or insolubility due to aggregation hampering the analysis of their native structure and function. Here, we present a new method of expression and purification of CEA N-terminal domains (N-A1) fused to MBP in Escherichia coli. In order to optimize the expression and purification of CEA N-A1 domains we evaluated bacteria cultivation conditions, the length of N-A1 domains, fusion systems (GST- and MBP-tag), IPTG concentrations and protein purification conditions. We have found that MBP-N-A1 fusion protein digested with TEV protease forms soluble aggregates composed of N-A1 domains and incompletely digested MBP-N-A1 fusion protein. Using 1.25 M guanidinium chloride (GdmCl) as a component of the elution buffer we were able to achieve an almost complete dissociation of the aggregates. The dissociation was monitored by circular dichroism and fluorescence measurements. The CD spectra and Ellman's assay suggest that the conformation of N-A1 domains and their disulphide bonds are correct.
Collapse
Affiliation(s)
- Hanna Czepczyńska-Krężel
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, PL-53-114 Wroclaw, Poland
| | | | | | | |
Collapse
|
40
|
Liévin-Le Moal V, Beau I, Rougeaux C, Kansau I, Fabrega S, Brice C, Korotkova N, Moseley SL, Servin AL. Apical expression of human full-length hCEACAM1-4L protein renders the Madin Darby Canine Kidney cells responsive to lipopolysaccharide leading to TLR4-dependent Erk1/2 and p38 MAPK signalling. Cell Microbiol 2011; 13:764-85. [PMID: 21352462 DOI: 10.1111/j.1462-5822.2011.01575.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
CEACAM1 expressed by granulocytes and epithelial cells is recognized as a membrane-associated receptor by some Gram-negative pathogens. Here we report a previously unsuspected role of human CEACAM1-4L (hCEACAM1-4L) in polarized epithelial cells. We find that in contrast with non-transfected cells, Madin Darby Canine Kidney strain II (MDCK) engineered for the apical expression of the long cytoplasmic chain protein hCEACAM1-4L showed a serum-independent increase in the phosphorylation of the extracellular signal-regulated kinase 1/2 (Erk1/2) and p38 mitogen-activated protein kinases (MAPKs) after treatment with lipopolysaccharide (LPS) of wild-type, diffusely adhering Afa/Dr Escherichia coli (Afa/Dr DAEC) strain IH11128. Aggregates of FITC-LPS bind the apical domain of MDCK-hCEACAM1-4L cells colocalizing with the apically expressed hCEACAM1-4L protein and do not bind MDCK-pCEP cells, and surface plasmon resonance analysis shows that LPS binds to the extracellular domain of the CEACAM1-4L protein. We showed that cell polarization and lipid rafts positively control the LPS-IH11128-induced phosphorylation of Erk1/2 in MDCK-hCEACAM1-4L cells. Structure-function analysis using mutated hCEACAM1-4L protein shows that the cytoplasmic domain of the protein is needed for LPS-induced MAPK signalling, and that phosphorylation of Tyr-residues is not increased in association with MAPK signalling. The hCEACAM1-4L-dependent Erk1/2 phosphorylation develops in the presence of lipid A and does not develop in the presence of penta-acylated LPS. Finally, small interfering RNA (siRNA) silencing of canine TLR4 abolishes the hCEACAM1-4L-dependent, LPS-induced phosphorylation of Erk1/2. Collectively, our results support the notion that the apically expressed, full-length hCEACAM1-4L protein functions as a novel LPS-conveying molecule at the mucosal surface of polarized epithelial cells for subsequent MD-2/TLR4 receptor-dependent MAPK Erk1/2 and p38 signalling.
Collapse
Affiliation(s)
- Vanessa Liévin-Le Moal
- INSERM, UMR756 «Signalisation et Physiopathologie des Cellules Epithéliales», Châtenay-Malabry, France Université Paris-Sud 11, Faculté de Pharmacie, Châtenay-Malabry, France
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Shewmaker F. The application of NMR techniques to bacterial adhesins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 715:241-56. [PMID: 21557068 DOI: 10.1007/978-94-007-0940-9_15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Extracellular adhesins frequently compose large, highly-ordered structural assemblies that project away from the bacterial surface. These assemblies, known as pili or fimbriae, are rod-like polymeric structures that in some cases can extend up to several micrometers from the cell surface. Because these adhesin structures are critical to bacterial colonization of host cell surfaces, there is an incentive to understand their structure, assembly and mechanism of host cell attachment. Various methods in Nuclear Magnetic Resonance (NMR) spectroscopy have been used to address these topics, yielding structural information at the atomic level. Also, new methods in solid-state NMR spectroscopy have thus far been under-utilized in the study of large adhesin structures and offer a powerful approach to overcoming problems with crystallization to better understand the structures of these complexes. The following is a brief overview of the contributions of NMR to the study of bacterial adhesins with an emphasis on the future potential of solid-state NMR.
Collapse
Affiliation(s)
- Frank Shewmaker
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD, 20814, USA.
| |
Collapse
|
42
|
The DraC usher in Dr fimbriae biogenesis of uropathogenic E. coli Dr+ strains. Arch Microbiol 2010; 192:351-63. [DOI: 10.1007/s00203-010-0564-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 02/12/2010] [Accepted: 03/10/2010] [Indexed: 10/19/2022]
|
43
|
Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
Collapse
Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
| | | |
Collapse
|
44
|
Croxen MA, Finlay BB. Molecular mechanisms of Escherichia coli pathogenicity. Nat Rev Microbiol 2009; 8:26-38. [DOI: 10.1038/nrmicro2265] [Citation(s) in RCA: 668] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
45
|
Zav'yalov V, Zavialov A, Zav'yalova G, Korpela T. Adhesive organelles of Gram-negative pathogens assembled with the classical chaperone/usher machinery: structure and function from a clinical standpoint. FEMS Microbiol Rev 2009; 34:317-78. [PMID: 20070375 DOI: 10.1111/j.1574-6976.2009.00201.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
This review summarizes current knowledge on the structure, function, assembly and biomedical applications of the superfamily of adhesive fimbrial organelles exposed on the surface of Gram-negative pathogens with the classical chaperone/usher machinery. High-resolution three-dimensional (3D) structure studies of the minifibers assembling with the FGL (having a long F1-G1 loop) and FGS (having a short F1-G1 loop) chaperones show that they exploit the same principle of donor-strand complementation for polymerization of subunits. The 3D structure of adhesive subunits bound to host-cell receptors and the final architecture of adhesive fimbrial organelles reveal two functional families of the organelles, respectively, possessing polyadhesive and monoadhesive binding. The FGL and FGS chaperone-assembled polyadhesins are encoded exclusively by the gene clusters of the γ3- and κ-monophyletic groups, respectively, while gene clusters belonging to the γ1-, γ2-, γ4-, and π-fimbrial clades exclusively encode FGS chaperone-assembled monoadhesins. Novel approaches are suggested for a rational design of antimicrobials inhibiting the organelle assembly or inhibiting their binding to host-cell receptors. Vaccines are currently under development based on the recombinant subunits of adhesins.
Collapse
|
46
|
Klaile E, Vorontsova O, Sigmundsson K, Müller MM, Singer BB, Öfverstedt LG, Svensson S, Skoglund U, Öbrink B. The CEACAM1 N-terminal Ig domain mediates cis- and trans-binding and is essential for allosteric rearrangements of CEACAM1 microclusters. J Cell Biol 2009; 187:553-67. [PMID: 19948502 PMCID: PMC2779236 DOI: 10.1083/jcb.200904149] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 10/19/2009] [Indexed: 11/22/2022] Open
Abstract
Cell adhesion molecules (CAMs) sense the extracellular microenvironment and transmit signals to the intracellular compartment. In this investigation, we addressed the mechanism of signal generation by ectodomains of single-pass transmembrane homophilic CAMs. We analyzed the structure and homophilic interactions of carcinoembryonic antigen (CEA)-related CAM 1 (CEACAM1), which regulates cell proliferation, apoptosis, motility, morphogenesis, and microbial responses. Soluble and membrane-attached CEACAM1 ectodomains were investigated by surface plasmon resonance-based biosensor analysis, molecular electron tomography, and chemical cross-linking. The CEACAM1 ectodomain, which is composed of four glycosylated immunoglobulin-like (Ig) domains, is highly flexible and participates in both antiparallel (trans) and parallel (cis) homophilic binding. Membrane-attached CEACAM1 ectodomains form microclusters in which all four Ig domains participate. Trans-binding between the N-terminal Ig domains increases formation of CEACAM1 cis-dimers and changes CEACAM1 interactions within the microclusters. These data suggest that CEACAM1 transmembrane signaling is initiated by adhesion-regulated changes of cis-interactions that are transmitted to the inner phase of the plasma membrane.
Collapse
Affiliation(s)
- Esther Klaile
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Olga Vorontsova
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | | | - Mario M. Müller
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | | | - Lars-Göran Öfverstedt
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Stina Svensson
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Ulf Skoglund
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Björn Öbrink
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| |
Collapse
|
47
|
Lowe AM, Yansouni CP, Behr MA. Causality and gastrointestinal infections: Koch, Hill, and Crohn's. THE LANCET. INFECTIOUS DISEASES 2008; 8:720-6. [DOI: 10.1016/s1473-3099(08)70257-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
48
|
Conners R, Hill DJ, Borodina E, Agnew C, Daniell SJ, Burton NM, Sessions RB, Clarke AR, Catto LE, Lammie D, Wess T, Brady RL, Virji M. The Moraxella adhesin UspA1 binds to its human CEACAM1 receptor by a deformable trimeric coiled-coil. EMBO J 2008; 27:1779-89. [PMID: 18497748 PMCID: PMC2396876 DOI: 10.1038/emboj.2008.101] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Accepted: 04/23/2008] [Indexed: 11/09/2022] Open
Abstract
Moraxella catarrhalis is a ubiquitous human-specific bacterium commonly associated with upper and lower respiratory tract infections, including otitis media, sinusitis and chronic obstructive pulmonary disease. The bacterium uses an autotransporter protein UspA1 to target an important human cellular receptor carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1). Using X-ray crystallography, we show that the CEACAM1 receptor-binding region of UspA1 unusually consists of an extended, rod-like left-handed trimeric coiled-coil. Mutagenesis and binding studies of UspA1 and the N-domain of CEACAM1 have been used to delineate the interacting surfaces between ligand and receptor and guide assembly of the complex. However, solution scattering, molecular modelling and electron microscopy analyses all indicate that significant bending of the UspA1 coiled-coil stalk also occurs. This explains how UspA1 can engage CEACAM1 at a site far distant from its head group, permitting closer proximity of the respective cell surfaces during infection.
Collapse
Affiliation(s)
- Rebecca Conners
- Department of Biochemistry, University of Bristol, Bristol, UK
| | - Darryl J Hill
- Department of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Elena Borodina
- Department of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | | | - Sarah J Daniell
- Department of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | | | | | | | - Lucy E Catto
- Department of Biochemistry, University of Bristol, Bristol, UK
| | - Donna Lammie
- Cardiff School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK
| | - Timothy Wess
- Cardiff School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK
| | - R Leo Brady
- Department of Biochemistry, University of Bristol, Bristol, UK
| | - Mumtaz Virji
- Department of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| |
Collapse
|
49
|
Escherichia coli DraE adhesin-associated bacterial internalization by epithelial cells is promoted independently by decay-accelerating factor and carcinoembryonic antigen-related cell adhesion molecule binding and does not require the DraD invasin. Infect Immun 2008; 76:3869-80. [PMID: 18559426 DOI: 10.1128/iai.00427-08] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Dr family of Escherichia coli adhesins are virulence factors associated with diarrhea and urinary tract infections. Dr fimbriae are comprised of two subunits. DraE/AfaE represents the major structural, antigenic, and adhesive subunit, which recognizes decay-accelerating factor (DAF) and carcinoembryonic antigen (CEA)-related cell adhesion molecules (CEACAMs) CEA, CEACAM1, CEACAM3, and CEACAM6 as binding receptors. The DraD/AfaD subunit caps fimbriae and has been implicated in the entry of Dr-fimbriated E. coli into host cells. In this study, we demonstrate that DAF or CEACAM receptors independently promote DraE-mediated internalization of E. coli by CHO cell transfectants expressing these receptors. We also found that DraE-positive recombinant bacteria adhere to and are internalized by primary human bladder epithelial cells which express DAF and CEACAMs. DraE-mediated bacterial internalization by bladder cells was inhibited by agents which disrupt lipid rafts, microtubules, and phosphatidylinositol 3-kinase (PI3K) activity. Immunofluorescence confocal microscopic examination of epithelial cells detected considerable recruitment of caveolin, beta(1) integrin, phosphorylated ezrin, phosphorylated PI3K, and tubulin, but not F-actin, by cell-associated bacteria. Finally, we demonstrate that the DraD subunit, previously implicated as an "invasin," is not required for beta(1) integrin recruitment or bacterial internalization.
Collapse
|