1
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Imlay LS, Lawong AK, Gahalawat S, Kumar A, Xing C, Mittal N, Wittlin S, Churchyard A, Niederstrasser H, Crespo-Fernandez B, Posner BA, Gamo FJ, Baum J, Winzeler EA, LALEU B, Ready JM, Phillips MA. Fast-Killing Tyrosine Amide (( S)-SW228703) with Blood- and Liver-Stage Antimalarial Activity Associated with the Cyclic Amine Resistance Locus ( PfCARL). ACS Infect Dis 2023; 9:527-539. [PMID: 36763526 PMCID: PMC10053980 DOI: 10.1021/acsinfecdis.2c00527] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Current malaria treatments are threatened by drug resistance, and new drugs are urgently needed. In a phenotypic screen for new antimalarials, we identified (S)-SW228703 ((S)-SW703), a tyrosine amide with asexual blood and liver stage activity and a fast-killing profile. Resistance to (S)-SW703 is associated with mutations in the Plasmodium falciparum cyclic amine resistance locus (PfCARL) and P. falciparum acetyl CoA transporter (PfACT), similarly to several other compounds that share features such as fast activity and liver-stage activity. Compounds with these resistance mechanisms are thought to act in the ER, though their targets are unknown. The tyramine of (S)-SW703 is shared with some reported PfCARL-associated compounds; however, we observed that strict S-stereochemistry was required for the activity of (S)-SW703, suggesting differences in the mechanism of action or binding mode. (S)-SW703 provides a new chemical series with broad activity for multiple life-cycle stages and a fast-killing mechanism of action, available for lead optimization to generate new treatments for malaria.
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Affiliation(s)
- Leah S. Imlay
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Aloysus K. Lawong
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Suraksha Gahalawat
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ashwani Kumar
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Chao Xing
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Nimisha Mittal
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California San Diego, La Jolla, CA, 92093, USA
| | - Sergio Wittlin
- Swiss Tropical and Public Health Institute, 4002, Basel, Switzerland
- University of Basel, 4002, Basel, Switzerland
| | - Alisje Churchyard
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | | | - Bruce A. Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | | | - Jake Baum
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
- School of Biomedical Sciences, University of New South Wales, Kensington, NSW, Australia
| | - Elizabeth A. Winzeler
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California San Diego, La Jolla, CA, 92093, USA
| | - Benoît LALEU
- Medicines for Malaria Venture, 1215 Geneva 15, Switzerland
| | - Joseph M. Ready
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Margaret A. Phillips
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
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2
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Lee G, Karunanithi S, Posner B, Niederstrasser H, Cheng H, Federov Y, Manjappa S, Musaitif K, Wang H, Jackson Z, Wald D. Chemical screening identifies novel small molecule activators of natural killer cell cytotoxicity against cancer cells. Cancer Immunol Immunother 2021; 71:1671-1680. [PMID: 34816323 DOI: 10.1007/s00262-021-03117-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
Natural killer (NK) cells are cytotoxic lymphocytes that play a major role in the innate immune system. NK cells exhibit potent cytotoxic activity against cancer cells and virally infected cells without antigen priming. These unique cytotoxic properties make NK cells a promising therapeutic against cancer. Limitations of NK cell therapy include deficiencies in high clinical efficacy often due to a need for a high NK cell to target cell ratio to achieve effective killing. In order to address the suboptimal efficacy of current adoptive NK cell therapy, a high throughput screen (HTS) was designed and performed to identify drug-like compounds that increase NK cytotoxic activity against tumor cells without affecting the normal cells. This screen was performed in a 384-well plate format utilizing an expanded primary NK cell product and ovarian cancer cells as a target cell (TC) line. Of the 8000 diverse small molecules screened, 16 hits were identified (0.2% hit rate) based on both a robust Z (RZ) score < -3 and a greater than 10% increase in NK cell killing. A validation screen had a confirmation rate of 70%. Select compounds were further validated and characterized by additional cytotoxicity assays including activity against multiple blood cancer and solid tumor cell lines, with no effect on primary human T cells. This work demonstrates that high-throughput screening can be reliably used to identify compounds that increase NK tumoricidal activity in vitro that can be further investigated and translated for potential clinical application. Précis: Our work led to the identification of promising compound that potently increases NK cell-mediated killing of a variety of different cancer cells, but no impact on the killing of normal cells. This compound demonstrates the utility of this assay.
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Affiliation(s)
- Grace Lee
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Sheela Karunanithi
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Bruce Posner
- High-Throughput Screening Core, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Hanspeter Niederstrasser
- High-Throughput Screening Core, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Hong Cheng
- High-Throughput Screening Core, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Yuriy Federov
- Small Molecule and Drug Discovery Facility, Case Western Reserve University, Cleveland, OH, USA
| | - Shivaprasad Manjappa
- Department of Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Karam Musaitif
- Idaho College of Osteopathic Medicine, Meridian, ID, USA
| | - Huaiyu Wang
- Department of Hematology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Zachary Jackson
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - David Wald
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA. .,Department of Pathology, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA.
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3
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White K, Esparza M, Liang J, Bhat P, Naidoo J, McGovern BL, Williams MAP, Alabi BR, Shay J, Niederstrasser H, Posner B, García-Sastre A, Ready J, Fontoura BMA. Aryl Sulfonamide Inhibits Entry and Replication of Diverse Influenza Viruses via the Hemagglutinin Protein. J Med Chem 2021; 64:10951-10966. [PMID: 34260245 PMCID: PMC8900595 DOI: 10.1021/acs.jmedchem.1c00304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Influenza viruses cause approximately half a million deaths every year worldwide. Vaccines are available but partially effective, and the number of antiviral medications is limited. Thus, it is crucial to develop therapeutic strategies to counteract this major pathogen. Influenza viruses enter the host cell via their hemagglutinin (HA) proteins. The HA subtypes of influenza A virus are phylogenetically classified into groups 1 and 2. Here, we identified an inhibitor of the HA protein, a tertiary aryl sulfonamide, that prevents influenza virus entry and replication. This compound shows potent antiviral activity against diverse H1N1, H5N1, and H3N2 influenza viruses encoding HA proteins from both groups 1 and 2. Synthesis of derivatives of this aryl sulfonamide identified moieties important for antiviral activity. This compound may be considered as a lead for drug development with the intent to be used alone or in combination with other influenza A virus antivirals to enhance pan-subtype efficacy.
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Affiliation(s)
- Kris White
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Matthew Esparza
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Jue Liang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Prasanna Bhat
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Jacinth Naidoo
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Briana L McGovern
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Michael A P Williams
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Busola R Alabi
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Jerry Shay
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Bruce Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States.,The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, United States
| | - Joseph Ready
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Beatriz M A Fontoura
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
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4
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Zhang Z, Ray S, Imlay L, Callaghan LT, Niederstrasser H, Mallipeddi PL, Posner BA, Wetzel DM, Phillips MA, Smith MW. Total synthesis of (+)-spiroindimicin A and congeners unveils their antiparasitic activity. Chem Sci 2021; 12:10388-10394. [PMID: 34377425 PMCID: PMC8336461 DOI: 10.1039/d1sc02838c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 06/25/2021] [Indexed: 12/02/2022] Open
Abstract
The spiroindimicins are a unique class of chlorinated indole alkaloids characterized by three heteroaromatic rings structured around a congested spirocyclic stereocenter. Here, we report the first total synthesis of (+)-spiroindimicin A, which bears a challenging C-3′/C-5′′-linked spiroindolenine. We detail our initial efforts to effect a biomimetic oxidative spirocyclization from its proposed natural precursor, lynamicin D, and describe how these studies shaped our final abiotic 9-step solution to this complex alkaloid built around a key Pd-catalyzed asymmetric spirocyclization. Scalable access to spiroindimicins A, H, and their congeners has enabled discovery of their activity against several parasites relevant to human health, providing potential starting points for new therapeutics for the neglected tropical diseases leishmaniasis and African sleeping sickness. Spiroindimicins A and H have been synthesized for the first time via a key palladium-catalyzed spirocyclization. Access to these alkaloids and several congeners has allowed the discovery of their antiparasitic properties.![]()
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Affiliation(s)
- Zhen Zhang
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Sneha Ray
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Leah Imlay
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Lauren T Callaghan
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA .,Department of Pediatrics, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Hanspeter Niederstrasser
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Prema Latha Mallipeddi
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Bruce A Posner
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Dawn M Wetzel
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA .,Department of Pediatrics, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Margaret A Phillips
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
| | - Myles W Smith
- Department of Biochemistry, UT Southwestern Medical Center 5323 Harry Hines Blvd Dallas TX 75390 USA
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5
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Lawong A, Gahalawat S, Okombo J, Striepen J, Yeo T, Mok S, Deni I, Bridgford JL, Niederstrasser H, Zhou A, Posner B, Wittlin S, Gamo FJ, Crespo B, Churchyard A, Baum J, Mittal N, Winzeler E, Laleu B, Palmer MJ, Charman SA, Fidock DA, Ready JM, Phillips MA. Novel Antimalarial Tetrazoles and Amides Active against the Hemoglobin Degradation Pathway in Plasmodium falciparum. J Med Chem 2021; 64:2739-2761. [PMID: 33620219 DOI: 10.1021/acs.jmedchem.0c02022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Malaria control programs continue to be threatened by drug resistance. To identify new antimalarials, we conducted a phenotypic screen and identified a novel tetrazole-based series that shows fast-kill kinetics and a relatively low propensity to develop high-level resistance. Preliminary structure-activity relationships were established including identification of a subseries of related amides with antiplasmodial activity. Assaying parasites with resistance to antimalarials led us to test whether the series had a similar mechanism of action to chloroquine (CQ). Treatment of synchronized Plasmodium falciparum parasites with active analogues revealed a pattern of intracellular inhibition of hemozoin (Hz) formation reminiscent of CQ's action. Drug selections yielded only modest resistance that was associated with amplification of the multidrug resistance gene 1 (pfmdr1). Thus, we have identified a novel chemical series that targets the historically druggable heme polymerization pathway and that can form the basis of future optimization efforts to develop a new malaria treatment.
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Affiliation(s)
- Aloysus Lawong
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Suraksha Gahalawat
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - John Okombo
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Josefine Striepen
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Tomas Yeo
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Sachel Mok
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Ioanna Deni
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Jessica L Bridgford
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Anwu Zhou
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Bruce Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Sergio Wittlin
- Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland.,University of Basel, 4002 Basel, Switzerland
| | | | - Benigno Crespo
- Medicines Development Campus, GlaxoSmithKline, Tres Cantos, 28760 Madrid, Spain
| | - Alisje Churchyard
- Department of Life Sciences, Imperial College London, SW7 2AZ South Kensington, U.K
| | - Jake Baum
- Department of Life Sciences, Imperial College London, SW7 2AZ South Kensington, U.K
| | - Nimisha Mittal
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California San Diego, La Jolla, California 92093, United States
| | - Elizabeth Winzeler
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California San Diego, La Jolla, California 92093, United States
| | - Benoît Laleu
- Medicines for Malaria Venture, 1215 Geneva, Switzerland
| | | | - Susan A Charman
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - David A Fidock
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, New York 10032, United States.,Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, New York 10032, United States
| | - Joseph M Ready
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Margaret A Phillips
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
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6
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Layeghi-Ghalehsoukhteh S, Pal Choudhuri S, Ocal O, Zolghadri Y, Pashkov V, Niederstrasser H, Posner BA, Kantheti HS, Azevedo-Pouly AC, Huang H, Girard L, MacDonald RJ, Brekken RA, Wilkie TM. Concerted cell and in vivo screen for pancreatic ductal adenocarcinoma (PDA) chemotherapeutics. Sci Rep 2020; 10:20662. [PMID: 33244070 PMCID: PMC7693321 DOI: 10.1038/s41598-020-77373-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 10/23/2020] [Indexed: 12/22/2022] Open
Abstract
PDA is a major cause of US cancer-related deaths. Oncogenic Kras presents in 90% of human PDAs. Kras mutations occur early in pre-neoplastic lesions but are insufficient to cause PDA. Other contributing factors early in disease progression include chronic pancreatitis, alterations in epigenetic regulators, and tumor suppressor gene mutation. GPCRs activate heterotrimeric G-proteins that stimulate intracellular calcium and oncogenic Kras signaling, thereby promoting pancreatitis and progression to PDA. By contrast, Rgs proteins inhibit Gi/q-coupled GPCRs to negatively regulate PDA progression. Rgs16::GFP is expressed in response to caerulein-induced acinar cell dedifferentiation, early neoplasia, and throughout PDA progression. In genetically engineered mouse models of PDA, Rgs16::GFP is useful for pre-clinical rapid in vivo validation of novel chemotherapeutics targeting early lesions in patients following successful resection or at high risk for progressing to PDA. Cultured primary PDA cells express Rgs16::GFP in response to cytotoxic drugs. A histone deacetylase inhibitor, TSA, stimulated Rgs16::GFP expression in PDA primary cells, potentiated gemcitabine and JQ1 cytotoxicity in cell culture, and Gem + TSA + JQ1 inhibited tumor initiation and progression in vivo. Here we establish the use of Rgs16::GFP expression for testing drug combinations in cell culture and validation of best candidates in our rapid in vivo screen.
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Affiliation(s)
- Somayeh Layeghi-Ghalehsoukhteh
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
- Department of Basic Science, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Shreoshi Pal Choudhuri
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
| | - Ozhan Ocal
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey
| | - Yalda Zolghadri
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
- Department of Basic Science, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Victor Pashkov
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
| | - Hanspeter Niederstrasser
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Bruce A Posner
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Havish S Kantheti
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
- Cancer Discovery (CanDisc) Group, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
| | - Ana C Azevedo-Pouly
- Department of Surgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Huocong Huang
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Luc Girard
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Raymond J MacDonald
- Department of Molecular Biology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Rolf A Brekken
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Thomas M Wilkie
- Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Drive, Dallas, TX, 75390, USA.
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7
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Ullah I, Gahalawat S, Booshehri LM, Niederstrasser H, Majumdar S, Leija C, Bradford JM, Hu B, Ready JM, Wetzel DM. An Antiparasitic Compound from the Medicines for Malaria Venture Pathogen Box Promotes Leishmania Tubulin Polymerization. ACS Infect Dis 2020; 6:2057-2072. [PMID: 32686409 DOI: 10.1021/acsinfecdis.0c00122] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The few frontline antileishmanial drugs are poorly effective and toxic. To search for new drugs for this neglected tropical disease, we tested the activity of compounds in the Medicines for Malaria Venture (MMV) "Pathogen Box" against Leishmania amazonensis axenic amastigotes. Screening yielded six discovery antileishmanial compounds with EC50 values from 50 to 480 nM. Concentration-response assays demonstrated that the best hit, MMV676477, had mid-nanomolar cytocidal potency against intracellular Leishmania amastigotes, Trypanosoma brucei, and Plasmodium falciparum, suggesting broad antiparasitic activity. We explored structure-activity relationships (SAR) within a small group of MMV676477 analogs and observed a wide potency range (20-5000 nM) against axenic Leishmania amastigotes. Compared to MMV676477, our most potent analog, SW41, had ∼5-fold improved antileishmanial potency. Multiple lines of evidence suggest that MMV676477 selectively disrupts Leishmania tubulin dynamics. Morphological studies indicated that MMV676477 and analogs affected L. amazonensis during cell division. Differential centrifugation showed that MMV676477 promoted partitioning of cellular tubulin toward the polymeric form in parasites. Turbidity assays with purified Leishmania and porcine tubulin demonstrated that MMV676477 promoted leishmanial tubulin polymerization in a concentration-dependent manner. Analogs' antiparasitic activity correlated with their ability to facilitate purified Leishmania tubulin polymerization. Chemical cross-linking demonstrated binding of the MMV676477 scaffold to purified Leishmania tubulin, and competition studies established a correlation between binding and antileishmanial activity. Our studies demonstrate that MMV676477 is a potent antiparasitic compound that preferentially promotes Leishmania microtubule polymerization. Due to its selectivity for and broad-spectrum activity against multiple parasites, this scaffold shows promise for antiparasitic drug development.
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Affiliation(s)
- Imran Ullah
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Suraksha Gahalawat
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Laela M. Booshehri
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Shreoshi Majumdar
- Department of Biophysics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Christopher Leija
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - James M. Bradford
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Bin Hu
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Joseph M. Ready
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
| | - Dawn M. Wetzel
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390, United States
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8
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Shen Q, Niederstrasser H, Barakat R, Haddadin Z, Miller SR, Posner B, Kim YT. Single-cell-level screening method for migratory cancer cells and its potential feasibility in high-throughput manner. Biofabrication 2020; 12:035019. [PMID: 32408287 DOI: 10.1088/1758-5090/ab9315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
High-throughput screening (HTS) is a well-established approach for tumor-specific drug development because of its high efficiency and customizable selection of antineoplastic drugs. However, there is still a lack of an appropriate cell-based HTS specific for migratory cancer cells. In the study presented here, we created a novel assay (mHTS): a single-cell-level screening method targeting migratory cancer cells and can be applied in a high-throughput manner. This mHTS platform is based on microchannel devices (providing physical confinement during cell migration and limit migrating cells' proliferation rate) assembled 96-well plate (fitting to HTS manner). To determine the feasibility of this assay, we quantified the anti-migratory and anti-viability effects of several molecules (Cytochalasin D, Doxorubicin and AZD-6244) on migrating (creeping inside microchannel) glioblastoma multiforme (GBM) cells. After analyzing migration screening data that was collected on a single-cell-level, we were able to compare those drug's effects on cancer cells' migration velocity and uncovered the migration inhibiting potential of AZD (500 nM and 1000 nM). Viability data based on single-cell-level screening also allowed us to further understand the same drug's different lethality toward migrating and normal 2D cultured cancer cells. The Pre-classification of subpopulations enables us to study the heterogeneity of cancer and ensures our method's feasibility for a high-throughput manner. All these results proved our mHTS platform is suitable for single-cell-level anti-migration drug screening and has potential feasibility in promoting the development of anti-migratory-cancer-drug in a high-throughput manner.
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Affiliation(s)
- Qionghua Shen
- Department of Bioengineering, University of Texas, Arlington, TX, United States of America
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9
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Esparza M, Mor A, Niederstrasser H, White K, White A, Zhang K, Gao S, Wang J, Liang J, Sho S, Sakthivel R, Sathe AA, Xing C, Muñoz-Moreno R, Shay JW, García-Sastre A, Ready J, Posner B, Fontoura BMA. Chemical intervention of influenza virus mRNA nuclear export. PLoS Pathog 2020; 16:e1008407. [PMID: 32240278 PMCID: PMC7117665 DOI: 10.1371/journal.ppat.1008407] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 02/17/2020] [Indexed: 02/05/2023] Open
Abstract
Influenza A viruses are human pathogens with limited therapeutic options. Therefore, it is crucial to devise strategies for the identification of new classes of antiviral medications. The influenza A virus genome is constituted of 8 RNA segments. Two of these viral RNAs are transcribed into mRNAs that are alternatively spliced. The M1 mRNA encodes the M1 protein but is also alternatively spliced to yield the M2 mRNA during infection. M1 to M2 mRNA splicing occurs at nuclear speckles, and M1 and M2 mRNAs are exported to the cytoplasm for translation. M1 and M2 proteins are critical for viral trafficking, assembly, and budding. Here we show that gene knockout of the cellular protein NS1-BP, a constituent of the M mRNA speckle-export pathway and a binding partner of the virulence factor NS1 protein, inhibits M mRNA nuclear export without altering bulk cellular mRNA export, providing an avenue to preferentially target influenza virus. We performed a high-content, image-based chemical screen using single-molecule RNA-FISH to label viral M mRNAs followed by multistep quantitative approaches to assess cellular mRNA and cell toxicity. We identified inhibitors of viral mRNA biogenesis and nuclear export that exhibited no significant activity towards bulk cellular mRNA at non-cytotoxic concentrations. Among the hits is a small molecule that preferentially inhibits nuclear export of a subset of viral and cellular mRNAs without altering bulk cellular mRNA export. These findings underscore specific nuclear export requirements for viral mRNAs and phenocopy down-regulation of the mRNA export factor UAP56. This RNA export inhibitor impaired replication of diverse influenza A virus strains at non-toxic concentrations. Thus, this screening strategy yielded compounds that alone or in combination may serve as leads to new ways of treating influenza virus infection and are novel tools for studying viral RNA trafficking in the nucleus.
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Affiliation(s)
- Matthew Esparza
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Amir Mor
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Hanspeter Niederstrasser
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Kris White
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Alexander White
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Ke Zhang
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Shengyan Gao
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Juan Wang
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Jue Liang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Sei Sho
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Ramanavelan Sakthivel
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Adwait A. Sathe
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Chao Xing
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Department of Population and Data Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Raquel Muñoz-Moreno
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Jerry W. Shay
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Joseph Ready
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Bruce Posner
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Beatriz M. A. Fontoura
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
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10
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Wang C, Niederstrasser H, Douglas PM, Lin R, Jaramillo J, Li Y, Oswald NW, Zhou A, McMillan EA, Mendiratta S, Wang Z, Zhao T, Lin Z, Luo M, Huang G, Brekken RA, Posner BA, MacMillan JB, Gao J, White MA. Author Correction: Small-molecule TFEB pathway agonists that ameliorate metabolic syndrome in mice and extend C. elegans lifespan. Nat Commun 2018; 9:2050. [PMID: 29784984 PMCID: PMC5962570 DOI: 10.1038/s41467-018-04519-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The originally published version of this Article contained an error in the spelling of the author Nathaniel W. Oswald, which was incorrectly given as Nathaniel W. Olswald. This has now been corrected in both the PDF and HTML versions of the Article.
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Affiliation(s)
- Chensu Wang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA.,Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Peter M Douglas
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Rueyling Lin
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Juan Jaramillo
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Yang Li
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Nathaniel W Oswald
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Anwu Zhou
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Elizabeth A McMillan
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Saurabh Mendiratta
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Zhaohui Wang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Tian Zhao
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Zhiqaing Lin
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Min Luo
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Gang Huang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Rolf A Brekken
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA.,Department of Surgery, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Bruce A Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - John B MacMillan
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA
| | - Jinming Gao
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA.
| | - Michael A White
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, 75390, Dallas, TX, USA.
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11
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Wang C, Niederstrasser H, Douglas PM, Lin R, Jaramillo J, Li Y, Oswald NW, Zhou A, McMillan EA, Mendiratta S, Wang Z, Zhao T, Lin Z, Luo M, Huang G, Brekken RA, Posner BA, MacMillan JB, Gao J, White MA. Small-molecule TFEB pathway agonists that ameliorate metabolic syndrome in mice and extend C. elegans lifespan. Nat Commun 2017; 8:2270. [PMID: 29273768 PMCID: PMC5741634 DOI: 10.1038/s41467-017-02332-3] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 11/21/2017] [Indexed: 12/31/2022] Open
Abstract
Drugs that mirror the cellular effects of starvation mimics are considered promising therapeutics for common metabolic disorders, such as obesity, liver steatosis, and for ageing. Starvation, or caloric restriction, is known to activate the transcription factor EB (TFEB), a master regulator of lipid metabolism and lysosomal biogenesis and function. Here, we report a nanotechnology-enabled high-throughput screen to identify small-molecule agonists of TFEB and discover three novel compounds that promote autophagolysosomal activity. The three lead compounds include the clinically approved drug, digoxin; the marine-derived natural product, ikarugamycin; and the synthetic compound, alexidine dihydrochloride, which is known to act on a mitochondrial target. Mode of action studies reveal that these compounds activate TFEB via three distinct Ca2+-dependent mechanisms. Formulation of these compounds in liver-tropic biodegradable, biocompatible nanoparticles confers hepatoprotection against diet-induced steatosis in murine models and extends lifespan of Caenorhabditis elegans. These results support the therapeutic potential of small-molecule TFEB activators for the treatment of metabolic and age-related disorders. Activation of autophagy, via the transcription factor TFEB, is a promising strategy to treat metabolic diseases. Here, the authors report three novel classes of small molecules that promote TFEB nuclear translocation, and provide evidence for the therapeutic efficacy of these compounds in mice and worms.
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Affiliation(s)
- Chensu Wang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.,Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Peter M Douglas
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Rueyling Lin
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Juan Jaramillo
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Yang Li
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Nathaniel W Oswald
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Anwu Zhou
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Elizabeth A McMillan
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Saurabh Mendiratta
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Zhaohui Wang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Tian Zhao
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Zhiqaing Lin
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Min Luo
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Gang Huang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Rolf A Brekken
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.,Department of Surgery, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Bruce A Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - John B MacMillan
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Jinming Gao
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.
| | - Michael A White
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.
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12
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Zhou H, Morales MG, Hashimoto H, Dickson ME, Song K, Ye W, Kim MS, Niederstrasser H, Wang Z, Chen B, Posner BA, Bassel-Duby R, Olson EN. ZNF281 enhances cardiac reprogramming by modulating cardiac and inflammatory gene expression. Genes Dev 2017; 31:1770-1783. [PMID: 28982760 PMCID: PMC5666675 DOI: 10.1101/gad.305482.117] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/07/2017] [Indexed: 02/06/2023]
Abstract
Direct reprogramming of fibroblasts to cardiomyocytes represents a potential means of restoring cardiac function following myocardial injury. AKT1 in the presence of four cardiogenic transcription factors, GATA4, HAND2, MEF2C, and TBX5 (AGHMT), efficiently induces the cardiac gene program in mouse embryonic fibroblasts but not adult fibroblasts. To identify additional regulators of adult cardiac reprogramming, we performed an unbiased screen of transcription factors and cytokines for those that might enhance or suppress the cardiogenic activity of AGHMT in adult mouse fibroblasts. Among a collection of inducers and repressors of cardiac reprogramming, we discovered that the zinc finger transcription factor 281 (ZNF281) potently stimulates cardiac reprogramming by genome-wide association with GATA4 on cardiac enhancers. Concomitantly, ZNF281 suppresses expression of genes associated with inflammatory signaling, suggesting the antagonistic convergence of cardiac and inflammatory transcriptional programs. Consistent with an inhibitory influence of inflammatory pathways on cardiac reprogramming, blockade of these pathways with anti-inflammatory drugs or components of the nucleosome remodeling deacetylase (NuRD) complex, which associate with ZNF281, stimulates cardiac gene expression. We conclude that ZNF281 acts at a nexus of cardiac and inflammatory gene programs, which exert opposing influences on fibroblast to cardiac reprogramming.
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Affiliation(s)
- Huanyu Zhou
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Maria Gabriela Morales
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Hisayuki Hashimoto
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Matthew E Dickson
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Kunhua Song
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Wenduo Ye
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Min S Kim
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Hanspeter Niederstrasser
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Zhaoning Wang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Beibei Chen
- Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Bruce A Posner
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Rhonda Bassel-Duby
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Eric N Olson
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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13
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Abstract
Molecular mechanisms for cell migration, especially how signaling and cytoskeletal systems are integrated, are not understood well. Here, we examined the role of CARMIL (capping protein, Arp2/3, and Myosin-I linker) family proteins in migrating cells. Vertebrates express three conserved genes for CARMIL, and we examined the functions of the two CARMIL genes expressed in migrating human cultured cells. Both isoforms, CARMIL1 and 2, were necessary for cell migration, but for different reasons. CARMIL1 localized to lamellipodia and macropinosomes, and loss of its function caused loss of lamellipodial actin, along with defects in protrusion, ruffling, and macropinocytosis. CARMIL1-knockdown cells showed loss of activation of Rac1, and CARMIL1 was biochemically associated with the GEF Trio. CARMIL2, in contrast, colocalized with vimentin intermediate filaments, and loss of its function caused a distinctive multipolar phenotype. Loss of CARMIL2 also caused decreased levels of myosin-IIB, which may contribute to the polarity phenotype. Expression of one CARMIL isoform was not able to rescue the knockdown phenotypes of the other. Thus, the two isoforms are both important for cell migration, but they have distinct functions.
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Affiliation(s)
- Yun Liang
- Department of Cell Biology and Physiology, Washington University, St. Louis, MO 63110, USA
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14
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Canton DA, Olsten MEK, Niederstrasser H, Cooper JA, Litchfield DW. The role of CKIP-1 in cell morphology depends on its interaction with actin-capping protein. J Biol Chem 2006; 281:36347-59. [PMID: 16987810 PMCID: PMC2583070 DOI: 10.1074/jbc.m607595200] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
CKIP-1 is a pleckstrin homology domain-containing protein that induces alterations of the actin cytoskeleton and cell morphology when expressed in human osteosarcoma cells. CKIP-1 interacts with the heterodimeric actin-capping protein in cells, so we postulated that this interaction was responsible for the observed cytoskeletal and morphological effects of CKIP-1. To test this postulate, we used peptide "walking arrays" and alignments of CKIP-1 with CARMIL, another CP-binding protein, to identify Arg-155 and Arg-157 of CKIP-1 as residues potentially required for its interactions with CP. CKIP-1 mutants harboring Arg-155 and Arg-157 substitutions exhibited greatly decreased CP binding, while retaining wild-type localization, the ability to interact with protein kinase CK2, and self-association. To examine the phenotype associated with expression of these mutants, we generated tetracycline-inducible human osteosarcoma cells lines expressing R155E,R157E mutants of CKIP-1. Examination of these cell lines reveals that CKIP-1 R155E,R157E did not induce the distinct changes in cell morphology and the actin cytoskeleton that are characteristic of wild-type CKIP-1 demonstrating that the interaction between CKIP-1 and CP is required for these cellular effects.
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Affiliation(s)
- David A. Canton
- Regulatory Biology and Functional Genomics Research Group, Siebens-Drake Medical Research Institute, Department of Biochemistry, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Mary Ellen K. Olsten
- Regulatory Biology and Functional Genomics Research Group, Siebens-Drake Medical Research Institute, Department of Biochemistry, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Hanspeter Niederstrasser
- Department of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, Missouri 63110
| | - John A. Cooper
- Department of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, Missouri 63110
| | - David W. Litchfield
- Regulatory Biology and Functional Genomics Research Group, Siebens-Drake Medical Research Institute, Department of Biochemistry, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario N6A 5C1, Canada
- To whom correspondence should be addressed: Dept. of Biochemistry, University of Western Ontario, Medical Sciences Bldg., London, Ontario N6A 5C1, Canada. Tel.: 519-661-4186; Fax: 519-661-3175; E-mail:
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15
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Bruck S, Huber TB, Ingham RJ, Kim K, Niederstrasser H, Allen PM, Pawson T, Cooper JA, Shaw AS. Identification of a novel inhibitory actin-capping protein binding motif in CD2-associated protein. J Biol Chem 2006; 281:19196-203. [PMID: 16707503 PMCID: PMC2581424 DOI: 10.1074/jbc.m600166200] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
CD2-associated protein (CD2AP) is a scaffold molecule that plays a critical role in the maintenance of the kidney filtration barrier. Little, however, is understood about its mechanism of function. We used mass spectrometry to identify CD2AP-interacting proteins. Many of the proteins that we identified suggest a role for CD2AP in endocytosis and actin regulation. To address the role of CD2AP in regulation of the actin cytoskeleton, we focused on characterizing the interaction of CD2AP with actin-capping protein CP. We identified a novel binding motif LXHXTXXRPK(X)6P present in CD2AP that is also found in its homolog Cin85 and other capping protein-associated proteins such as CARMIL and CKIP-1. CD2AP inhibits the function of capping protein in vitro. Therefore, our results support a role of CD2AP in the regulation of the actin cytoskeleton.
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Affiliation(s)
- Serawit Bruck
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
- Graduate Program in Molecular Biophysics, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Tobias B. Huber
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Robert J. Ingham
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario MSG 1X5, Canada
| | - Kyoungtae Kim
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Hanspeter Niederstrasser
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Paul M. Allen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Tony Pawson
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario MSG 1X5, Canada
| | - John A. Cooper
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Andrey S. Shaw
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
- To whom correspondence should be addressed: Dept. of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110. Tel.: 314-362-4614; Fax: 314-747-4888; E-mail:
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Maresca TJ, Niederstrasser H, Weis K, Heald R. Xnf7 contributes to spindle integrity through its microtubule-bundling activity. Curr Biol 2006; 15:1755-61. [PMID: 16213823 DOI: 10.1016/j.cub.2005.08.049] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2005] [Revised: 08/17/2005] [Accepted: 08/18/2005] [Indexed: 11/27/2022]
Abstract
Regulation of microtubule dynamics and organization in mitosis by a number of microtubule-associated proteins (MAPs) is required for proper bipolar spindle assembly, yet the precise mechanisms by which many MAPs function are poorly understood. One interesting class of MAPs is known to localize to the nucleus during interphase yet fulfill important spindle functions during mitosis. We have identified Xenopus nuclear factor 7 (Xnf7), a developmental regulator of dorsal-ventral patterning, as a microtubule-binding protein that also associates with the nuclear import receptor importin alpha/beta. Xnf7 localized to interphase nuclei and metaphase spindles both in Xenopus egg extracts and cultured cells. Xnf7-depleted spindles were hypersensitive to microtubule-depolymerizing agents. Functional characterization of Xnf7 revealed that it binds directly to microtubules, exhibits RING-finger-dependent E3-ubiquitin-ligase activity, and has C-terminal-dependent microtubule-bundling activity. The minimal microtubule-bundling domain of Xnf7 was sufficient to rescue the spindle-hypersensitivity phenotype. Thus, we have identified Xnf7 as a nuclear MAP whose microtubule-bundling activity, but not E3-ligase activity, contributes to microtubule organization and spindle integrity. Characterization of the multiple activities of Xnf7 may have implications for understanding human diseases caused by mutations in related proteins.
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Affiliation(s)
- Thomas J Maresca
- Department of Molecular and Cell Biology, University of California, Berkeley 94720-3200, USA
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Westermann S, Avila-Sakar A, Wang HW, Niederstrasser H, Wong J, Drubin DG, Nogales E, Barnes G. Formation of a dynamic kinetochore- microtubule interface through assembly of the Dam1 ring complex. Mol Cell 2005; 17:277-90. [PMID: 15664196 DOI: 10.1016/j.molcel.2004.12.019] [Citation(s) in RCA: 238] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Revised: 12/29/2004] [Accepted: 12/30/2004] [Indexed: 11/18/2022]
Abstract
How kinetochore proteins form a dynamic interface with microtubules is largely unknown. In budding yeast, the 10-protein Dam1 complex is an Aurora kinase target that plays essential roles maintaining the integrity of the mitotic spindle and regulating interactions with the kinetochore. Here, we investigated the biochemical properties of purified Dam1 complex. The complex oligomerized into rings around microtubules. Ring formation was facilitated by microtubules but could occur in their absence. Mutant alleles led to partially assembled complexes or reduced microtubule binding. The interaction between rings and microtubules is mediated by the C termini of both Dam1 and alphabeta-tubulin. Ring formation promotes microtubule assembly, stabilizes against disassembly, and promotes bundling. A GTP-tubulin lattice is the preferred binding partner for the complex, and Dam1 rings can exhibit lateral mobility on microtubules. These observations suggest a mechanism by which the kinetochore can recognize and stay attached to the plus ends of microtubules.
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Affiliation(s)
- Stefan Westermann
- Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA
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Abstract
Tubulin is known to exist in at least two main conformations: straight when bound to GTP or buried within the microtubule lattice, and curved when bound to GDP. The latter is most obvious during microtubule depolymerization, when protofilaments bend and peel off from microtubule ends. The curved, low-energy subunits form tantalizing ring structures in the presence of stabilizing divalent cations. Interestingly, cellular factors and antimitotic agents that act by depolymerizing microtubules can induce the formation of rings. In these rings, tubulin dimers generally appear kinked at the monomer-monomer interface, either to the same or to a lesser extent than at the dimer-dimer interface, with each agent giving rise to particular subtleties in the structures of the rings and the tubulin dimer itself that may reflect their distinctive mechanisms of action. How these kinks relate to what happens when the stored energy of GTP hydrolysis is released, freeing GDP*tubulin into an unconstrained state, remains an open question.
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Affiliation(s)
- Eva Nogales
- Howard Hughes Medical Institute, Molecular and Cell Biology Department and Life Science Division, Lawrence Berkeley National Laboratory, 355 Life Sciences Addition, University of California, 94720-3200, USA
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Abstract
The stability of microtubules during the cell-cycle is regulated by a number of cellular factors, some of which stabilize microtubules and others that promote breakdown. XKCM1 is a kinesin-like protein that induces microtubule depolymerization and is required for mitotic spindle assembly. We have examined the binding and depolymerization effects of XKCM1 on different tubulin polymers in order to learn about its mechanism of action. Zinc-induced tubulin polymers, characterized by an anti-parallel protofilament arrangement, are depolymerized by XKCM1, indicating that this enzyme acts on a single protofilament. GDP-tubulin rings, which correspond to the low-energy state of tubulin, are stable only under conditions that inhibit XKCM1 depolymerizing activity, but can be stabilized by XKCM1 bound to AMPPNP. Tubulin polymers made of subtilisin-treated tubulin (lacking the tubulin C-terminal tail) are resistant to XKCM1-induced depolymerization, suggesting that the interaction of the acidic tail of tubulin with basic residues in XKCM1 unique to Kin I proteins is required for depolymerization.
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Affiliation(s)
- Hanspeter Niederstrasser
- Molecular and Cell Biology Department, University of California at Berkeley, Berkeley, CA 94720-3200, USA
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Gournier H, Goley ED, Niederstrasser H, Trinh T, Welch MD. Reconstitution of human Arp2/3 complex reveals critical roles of individual subunits in complex structure and activity. Mol Cell 2001; 8:1041-52. [PMID: 11741539 DOI: 10.1016/s1097-2765(01)00393-8] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The Arp2/3 complex is a seven-protein assembly that is critical for actin nucleation and branching in cells. Here we report the reconstitution of active human Arp2/3 complex after expression of all seven subunits in insect cells. Expression of partial complexes revealed that a heterodimer of the p34 and p20 subunits constitutes a critical structural core of the complex, whereas the remaining subunits are peripherally located. Arp3 is crucial for nucleation, consistent with it being a structural component of the nucleation site. p41, p21, and p16 contribute differently to nucleation and stimulation by ActA and WASP, whereas p34/p20 bind actin filaments and likely function in actin branching. This study reveals that the nucleating and organizing functions of Arp2/3 complex subunits are separable, indicating that these activities may be differentially regulated in cells.
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Affiliation(s)
- H Gournier
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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Niederstrasser H, Strube CD. [Diagnostic expert system for the D-2 mission robot experiment: development of an automated "Health and Fault Management"-system]. DLR Nachr 1991; 63:36-41. [PMID: 11542968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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