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Alonso-Gutiérrez D, Goñi JM. Brunn-Minkowski Inequality for θ-Convolution Bodies via Ball's Bodies. J Geom Anal 2023; 34:58. [PMID: 38161409 PMCID: PMC10756892 DOI: 10.1007/s12220-023-01508-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 11/27/2023] [Indexed: 01/03/2024]
Abstract
We consider the problem of finding the best function φ n : [ 0 , 1 ] → R such that for any pair of convex bodies K , L ∈ R n the following Brunn-Minkowski type inequality holds | K + θ L | 1 n ≥ φ n ( θ ) ( | K | 1 n + | L | 1 n ) , where K + θ L is the θ -convolution body of K and L. We prove a sharp inclusion of the family of Ball's bodies of an α -concave function in its super-level sets in order to provide the best possible function in the range 3 4 n ≤ θ ≤ 1 , characterizing the equality cases.
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Affiliation(s)
- David Alonso-Gutiérrez
- Área de análisis matemático, Departamento de matemáticas, Facultad de Ciencias, Universidad de Zaragoza, IUMA, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Javier Martín Goñi
- Área de análisis matemático, Departamento de matemáticas, Facultad de Ciencias, Universidad de Zaragoza, IUMA, Pedro Cerbuna 12, 50009 Zaragoza, Spain
- Faculty of Computer Science and Mathematics, University of Passau, Innstrasse 33, 94032 Passau, Germany
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2
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Martínez-Domínguez SJ, García-Mateo S, Sainz-Arnal P, Martínez-García J, Gallego-Llera B, Lozano-Limones MJ, Hidalgo S, Gargallo-Puyuelo CJ, Latre-Santos M, Nocito-Colon MML, Martínez-Lostao L, Refaie E, Arroyo-Villarino MT, Del Rio-Nechaevsky M, Ramirez-Labrada A, Pardo J, Gomollón F, Baptista PM. Unravelling the cellular response to the SARS-COV-2 vaccine in inflammatory bowel disease patients on biologic drugs. Sci Rep 2023; 13:23061. [PMID: 38155275 PMCID: PMC10754931 DOI: 10.1038/s41598-023-50537-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 09/09/2023] [Accepted: 12/21/2023] [Indexed: 12/30/2023] Open
Abstract
Suboptimal vaccine response is a significant concern in patients with Inflammatory Bowel Disease (IBD) receiving biologic drugs. This single-center observational study involved 754 patients with IBD. In Phase I (October 2020-April 2021), 754 IBD participants who had not previously received the SARS-CoV-2 vaccine, underwent blood extraction to assess the seroprevalence of SARS-CoV-2 infection and IBD-related factors. Phase II (May 2021-October 2021) included a subgroup of 52 IBD participants with confirmed previous SARS-CoV-2 infection, who were studied for humoral and cellular response to the SARS-CoV-2 vaccine. In Phase I, treatment with anti-TNF was associated with lower rates of seroconversion (aOR 0.25 95% CI [0.10-0.61]). In Phase II, a significant increase in post-vaccination IgG levels was observed regardless of biologic treatment. However, patients treated with anti-TNF exhibited significantly lower IgG levels compared to those without IBD therapy (5.32 ± 2.47 vs. 7.99 ± 2.59 U/ml, p = 0.042). Following vaccination, a lymphocyte, monocyte, and NK cell activation pattern was observed, with no significant differences between patients receiving biologic drugs and those without IBD treatment. Despite lower seroprevalence and humoral response to the SARS-CoV-2 vaccine in patients treated with anti-TNF, the cellular response to the vaccine did not differ significantly from that patients without IBD therapy.
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Affiliation(s)
- Samuel J Martínez-Domínguez
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain.
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain.
- University of Zaragoza, Zaragoza, Spain.
| | - Sandra García-Mateo
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
| | | | - Javier Martínez-García
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
| | | | | | - Sandra Hidalgo
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
| | - Carla J Gargallo-Puyuelo
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
| | - Marta Latre-Santos
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain
| | | | - Luis Martínez-Lostao
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
- Immunology Department, University Hospital "Lozano Blesa", Zaragoza, Spain
- Institute of Nanoscience and Material of Aragón (INMA), Zaragoza, Spain
| | - Engy Refaie
- Scuola di Specializzazione in Chirurgia Generale, Università Degli Studi di Pavia Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Maria Teresa Arroyo-Villarino
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
| | - Marcela Del Rio-Nechaevsky
- CIBEREnfermedadesRaras (CIBERER), Madrid, Spain
- Biomedical Engineering Department, Universidad Carlos III de Madrid, Madrid, Spain
- IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Ariel Ramirez-Labrada
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
- CIBER Enfermedades Infecciosas (CIBERINFEC), Madrid, Spain
| | - Julián Pardo
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
- CIBER Enfermedades Infecciosas (CIBERINFEC), Madrid, Spain
| | - Fernando Gomollón
- Digestive Diseases Department, University Hospital "Lozano Blesa", Av. San Juan Bosco, nº 15. PC: 50009, Zaragoza, Spain
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- University of Zaragoza, Zaragoza, Spain
- CIBER Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Pedro M Baptista
- Aragón Health Research Institute (IIS Aragón), Zaragoza, Spain
- Biomedical Engineering Department, Universidad Carlos III de Madrid, Madrid, Spain
- CIBER Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
- Fundación ARAID, Zaragoza, Spain
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Rizzuti B, Abian O, Velazquez-Campoy A, Neira JL. Conformational Stability of the N-Terminal Region of MDM2. Molecules 2023; 28:7578. [PMID: 38005300 PMCID: PMC10673428 DOI: 10.3390/molecules28227578] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 10/10/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
MDM2 is an E3 ubiquitin ligase which is crucial for the degradation and inhibition of the key tumor-suppressor protein p53. In this work, we explored the stability and the conformational features of the N-terminal region of MDM2 (N-MDM2), through which it binds to the p53 protein as well as other protein partners. The isolated domain possessed a native-like conformational stability in a narrow pH range (7.0 to 10.0), as shown by intrinsic and 8-anilinonapthalene-1-sulfonic acid (ANS) fluorescence, far-UV circular dichroism (CD), and size exclusion chromatography (SEC). Guanidinium chloride (GdmCl) denaturation followed by intrinsic and ANS fluorescence, far-UV CD and SEC at physiological pH, and differential scanning calorimetry (DSC) and thermo-fluorescence experiments showed that (i) the conformational stability of isolated N-MDM2 was very low; and (ii) unfolding occurred through the presence of several intermediates. The presence of a hierarchy in the unfolding intermediates was also evidenced through DSC and by simulating the unfolding process with the help of computational techniques based on constraint network analysis (CNA). We propose that the low stability of this protein is related to its inherent flexibility and its ability to interact with several molecular partners through different routes.
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Affiliation(s)
- Bruno Rizzuti
- CNR-NANOTEC, SS Rende (CS), Department of Physics, University of Calabria, 87036 Rende, Italy
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI)—Unidad mixta GBsC-CSIC-BIFI, Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
| | - Olga Abian
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI)—Unidad mixta GBsC-CSIC-BIFI, Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas (CIBERehd), 28029 Madrid, Spain
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Adrián Velazquez-Campoy
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI)—Unidad mixta GBsC-CSIC-BIFI, Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
- Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas y Digestivas (CIBERehd), 28029 Madrid, Spain
- Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - José L. Neira
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI)—Unidad mixta GBsC-CSIC-BIFI, Universidad de Zaragoza, 50018 Zaragoza, Spain; (O.A.); (A.V.-C.)
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDIBE), Universidad Miguel Hernández, 03202 Elche, Spain
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Martínez-Domínguez SJ, García-Mateo S, Gargallo-Puyuelo CJ, Gallego-Llera B, Callau P, Mendi C, Arroyo-Villarino MT, Simón-Marco MÁ, Ampuero J, Gomollón F. Inflammatory Bowel Disease Is an Independent Risk Factor for Metabolic Dysfunction-Associated Steatotic Liver Disease in Lean Individuals. Inflamm Bowel Dis 2023:izad175. [PMID: 37607330 DOI: 10.1093/ibd/izad175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Indexed: 08/24/2023]
Abstract
BACKGROUND Despite classical association between metabolic dysfunction-associated steatotic liver disease (MASLD) and obesity, there is increasing evidence on the development of MASLD in lean individuals. The aim of the study was to assess the prevalence and risk factors of MASLD and significant liver fibrosis in lean participants with inflammatory bowel disease (IBD). METHODS This was a cross-sectional, case-control study including 300 lean cases with IBD and 80 lean controls without IBD, matched by sex and age. All participants underwent a liver ultrasound, transient elastography, and laboratory tests. RESULTS The lean IBD group showed a significantly higher prevalence of MASLD compared with lean non-IBD group (21.3% vs 10%; P = .022), but no differences were observed in the prevalence of significant liver fibrosis (4.7% vs 0.0%; P = 1.000). No differences were found between the prevalence of MASLD in IBD and non-IBD participants who were overweight/obese (66.8% vs 70.8%; P = .442). In addition, the prevalence of MASLD was significantly higher in the overweight/obese IBD group compared with the lean IBD group (P < .001). IBD was an independent risk factor for MASLD in lean participants (odds ratio [OR], 2.71; 95% confidence interval [CI], 1.05-7.01; P = .04), after adjusting for classic metabolic risk factors and prior history of systemic steroid use. Nevertheless, no association between IBD related factors and MASLD was identified in lean IBD participants. When the overweight/obese and lean IBD groups with MASLD were compared, the overweight/obese IBD group with MASLD showed higher levels of the homeostatic model assessment of insulin resistance (OR, 1.49; 95% CI, 1.11-1.98; P = .007) and history of smoking (OR, 4.66; 95% CI, 1.17-18.49; P = .029). CONCLUSIONS MASLD prevalence was higher in the lean IBD group compared with lean non-IBD group, independent of classic metabolic risk factors.
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Affiliation(s)
- Samuel J Martínez-Domínguez
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
| | - Sandra García-Mateo
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
| | - Carla J Gargallo-Puyuelo
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
| | - Beatriz Gallego-Llera
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
| | - Pilar Callau
- Primary care center Delicias Sur, Zaragoza, Spain
| | | | - María Teresa Arroyo-Villarino
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
| | - Miguel Ángel Simón-Marco
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
| | - Javier Ampuero
- Department of Digestive Diseases, Virgen del Rocío University Hospital, Sevilla, Spain
- Department of Medicine, University of Sevilla, Sevilla, Spain
- Clinical and Translational Research Group in Liver and Digestive Diseases, Biomedicine Institute of Sevilla, Sevilla, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Madrid, Spain
| | - Fernando Gomollón
- Department of Gastroenterology, Lozano Blesa University Hospital, Zaragoza, Spain
- Digestive Pathology Translational Research Group, Aragón Health Research Institute, Zaragoza, Spain
- Department of Medicine, School of Medicine, University of Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Madrid, Spain
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Latorre-Pellicer A, Trujillano L, Del Rincón J, Peña-Marco M, Gil-Salvador M, Lucia-Campos C, Arnedo M, Puisac B, Ramos FJ, Ayerza-Casas A, Pié J. Heart Disease Characterization and Myocardial Strain Analysis in Patients with PACS1 Neurodevelopmental Disorder. J Clin Med 2023; 12:4052. [PMID: 37373745 DOI: 10.3390/jcm12124052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND PACS1 neurodevelopmental disorder (PACS1-NDD) (MIM# 615009) is a rare autosomal dominant disease characterized by neurodevelopmental delay, dysmorphic facial features, and congenital malformations. Heart disease (HD) is frequently present in individuals with PACS1-NDD, but a compressive review of these anomalies and an evaluation of cardiac function in a cohort of patients are lacking. METHODS (i) Cardiac evaluation in 11 PACS1-NDD patients was conducted using conventional echocardiography. (ii) Heart function was assessed by tissue Doppler imaging, and two-dimensional speckle tracking was performed in seven patients and matched controls. (iii) This systematic review focused on determining HD prevalence in individuals with PACS1-NDD. RESULTS In our cohort, 7 of 11 patients presented HD. (Among them, three cases of ascending aortic dilatation (AAD) were detected and one mitral valve prolapse (MVP).) None of the patients showed echocardiographic pathological values, and the left global longitudinal strain was not significantly different between patients and controls (patients -24.26 ± 5.89% vs. controls -20.19 ± 1.75%, p = 0.3176). In the literature review, almost 42% (42/100) of individuals with PACS1-NDD reportedly experienced HD. Septal defects were the most common malformation, followed by patent ductus arteriosus. CONCLUSIONS Our results show a high prevalence of HD in PACS1-NDD patients; in this way, AAD and MVP are reported for the first time in this syndrome. Furthermore, a detailed cardiac function evaluation in our cohort did not reveal evidence of cardiac dysfunction in individuals with PACS1-NDD. Cardiology evaluation should be included for all individuals with Schuurs-Hoeijmakers syndrome.
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Affiliation(s)
- Ana Latorre-Pellicer
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Laura Trujillano
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
- Department of Clinical and Molecular Genetics Hospital Vall d'Hebron, E-08035 Barcelona, Spain
| | - Julia Del Rincón
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Mónica Peña-Marco
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Marta Gil-Salvador
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Cristina Lucia-Campos
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - María Arnedo
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Beatriz Puisac
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Feliciano J Ramos
- Unit of Clinical Genetics, Department of Paediatrics, Service of Paediatrics, Hospital Clínico Universitario Lozano Blesa, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
| | - Ariadna Ayerza-Casas
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
- Unit of Paediatric Cardiology, Service of Paediatrics, Hospital Universitario Miguel Servet, E-50009 Zaragoza, Spain
| | - Juan Pié
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, E-50009 Zaragoza, Spain
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Aparicio-Téllez R, Garcia-Bosque M, Díez-Señorans G, Celma S. Oscillator Selection Strategies to Optimize a Physically Unclonable Function for IoT Systems Security. Sensors (Basel) 2023; 23:s23094410. [PMID: 37177612 PMCID: PMC10181650 DOI: 10.3390/s23094410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023]
Abstract
Physically unclonable functions avoid storing secret information in non-volatile memories and only generate a key when it is necessary for an application, rising as a promising solution for the authentication of resource-constrained IoT devices. However, the need to minimize the predictability of physically unclonable functions is evident. The main purpose of this work is to determine the optimal way to construct a physically unclonable function. To do this, a ring oscillator physically unclonable function based on comparing oscillators in pairs has been implemented in an FPGA. This analysis shows that the frequencies of the oscillators greatly vary depending on their position in the FPGA, especially between oscillators implemented in different types of slices. Furthermore, the influence of the chosen locations of the ring oscillators on the quality of the physically unclonable function has been analyzed and we propose five strategies to select the locations of the oscillators. Among the strategies proposed, two of them stand out for their high uniqueness, reproducibility, and identifiability, so they can be used for authentication purposes. Finally, we have analyzed the reproducibility for the best strategy facing voltage and temperature variations, showing that it remains stable in the studied range.
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Affiliation(s)
- Raúl Aparicio-Téllez
- Group of Electronic Design (GDE), Aragón Institute of Engineering Research (I3A), University of Zaragoza, 50009 Zaragoza, Spain
| | - Miguel Garcia-Bosque
- Group of Electronic Design (GDE), Aragón Institute of Engineering Research (I3A), University of Zaragoza, 50009 Zaragoza, Spain
| | - Guillermo Díez-Señorans
- Group of Electronic Design (GDE), Aragón Institute of Engineering Research (I3A), University of Zaragoza, 50009 Zaragoza, Spain
| | - Santiago Celma
- Group of Electronic Design (GDE), Aragón Institute of Engineering Research (I3A), University of Zaragoza, 50009 Zaragoza, Spain
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Ben Abdallah A, Ben Hassen Trabelsi A, Navarro MV, Veses A, García T, Mihoubi D. Pyrolysis of tea and coffee wastes: effect of physicochemical properties on kinetic and thermodynamic characteristics. J Therm Anal Calorim 2023; 148:2501-2515. [PMID: 36789153 PMCID: PMC9911335 DOI: 10.1007/s10973-022-11878-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 12/07/2022] [Indexed: 06/18/2023]
Abstract
UNLABELLED Physicochemical properties, kinetic pyrolysis and thermodynamic study of spent green tea, pure spent coffee grounds, spent coffee grounds blended with 50% torrefied barley and coffee husk were experimentally investigated using thermogravimetric analysis under an inert atmosphere to evaluate their thermochemical application. Five isoconversional methods were applied to determine effective activation energy (E a) of the pyrolysis processes. All methods showed good agreement by determining fluctuating E a values (150-500 kJ mol-1). Complex E a profiles with conversion were divided into four stages corresponding to thermal degradation of main biomass constituents (extractives, hemicellulose, cellulose and lignin), indicating that extractives decomposition was the least demanding reaction while lignin decomposition was the most demanding. The kinetic process was verified by reconstruction according to the Friedman parameters. The thermodynamic parameters were evaluated to determine the energy demand and efficiency throughout the process. The values obtained for physicochemical properties such as volatile matter (> 68%) and higher heating value (> 17 MJ kg-1), average E a (223-319 kJ mol-1) and significant energy efficiency implied that these types of biomass waste have significant reactivity and consequently the highest potential for the production of bioenergy and a range of high-value chemicals and materials. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10973-022-11878-4.
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Affiliation(s)
- Asma Ben Abdallah
- Department of Energy Engineering, National School of Engineers of Monastir, University of Monastir, 5000 Monastir, Tunisia
- Laboratory of Wind Energy Management and Waste Energy Recovery (LMEEVED), Research and Technology Center of Energy (CRTEn), B.P. 95, 2050 Hammam-Lif, Tunisia
| | - Aïda Ben Hassen Trabelsi
- Laboratory of Wind Energy Management and Waste Energy Recovery (LMEEVED), Research and Technology Center of Energy (CRTEn), B.P. 95, 2050 Hammam-Lif, Tunisia
| | | | - Alberto Veses
- Instituto de Carboquímica (ICB-CSIC), C/ Miguel Luesma Castán 4, 50018 Zaragoza, Spain
| | - Tomás García
- Instituto de Carboquímica (ICB-CSIC), C/ Miguel Luesma Castán 4, 50018 Zaragoza, Spain
| | - Daoued Mihoubi
- Laboratory of Wind Energy Management and Waste Energy Recovery (LMEEVED), Research and Technology Center of Energy (CRTEn), B.P. 95, 2050 Hammam-Lif, Tunisia
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Cedzich C, Geib T, Grünbaum FA, Velázquez L, Werner AH, Werner RF. Quantum Walks: Schur Functions Meet Symmetry Protected Topological Phases. Commun Math Phys 2021; 389:31-74. [PMID: 35095108 PMCID: PMC8761157 DOI: 10.1007/s00220-021-04284-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 11/22/2021] [Indexed: 06/14/2023]
Abstract
This paper uncovers and exploits a link between a central object in harmonic analysis, the so-called Schur functions, and the very hot topic of symmetry protected topological phases of quantum matter. This connection is found in the setting of quantum walks, i.e. quantum analogs of classical random walks. We prove that topological indices classifying symmetry protected topological phases of quantum walks are encoded by matrix Schur functions built out of the walk. This main result of the paper reduces the calculation of these topological indices to a linear algebra problem: calculating symmetry indices of finite-dimensional unitaries obtained by evaluating such matrix Schur functions at the symmetry protected points ± 1 . The Schur representation fully covers the complete set of symmetry indices for 1D quantum walks with a group of symmetries realizing any of the symmetry types of the tenfold way. The main advantage of the Schur approach is its validity in the absence of translation invariance, which allows us to go beyond standard Fourier methods, leading to the complete classification of non-translation invariant phases for typical examples.
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Affiliation(s)
- C. Cedzich
- Quantum Technology Group, Heinrich Heine Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - T. Geib
- Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, Germany
| | - F. A. Grünbaum
- Department of Mathematics, University of California, Berkeley, Berkeley, CA 94720 USA
| | - L. Velázquez
- Departamento de Matemática Aplicada & IUMA, Universidad de Zaragoza, María de Luna 3, 50018 Zaragoza, Spain
| | - A. H. Werner
- QMATH, Department of Mathematical Sciences, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
- NBIA, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
| | - R. F. Werner
- Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, 30167 Hannover, Germany
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9
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Latorre-Pellicer A, Gil-Salvador M, Parenti I, Lucia-Campos C, Trujillano L, Marcos-Alcalde I, Arnedo M, Ascaso Á, Ayerza-Casas A, Antoñanzas-Pérez R, Gervasini C, Piccione M, Mariani M, Weber A, Kanber D, Kuechler A, Munteanu M, Khuller K, Bueno-Lozano G, Puisac B, Gómez-Puertas P, Selicorni A, Kaiser FJ, Ramos FJ, Pié J. Clinical relevance of postzygotic mosaicism in Cornelia de Lange syndrome and purifying selection of NIPBL variants in blood. Sci Rep 2021; 11:15459. [PMID: 34326454 PMCID: PMC8322329 DOI: 10.1038/s41598-021-94958-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 05/27/2021] [Accepted: 07/19/2021] [Indexed: 11/09/2022] Open
Abstract
Postzygotic mosaicism (PZM) in NIPBL is a strong source of causality for Cornelia de Lange syndrome (CdLS) that can have major clinical implications. Here, we further delineate the role of somatic mosaicism in CdLS by describing a series of 11 unreported patients with mosaic disease-causing variants in NIPBL and performing a retrospective cohort study from a Spanish CdLS diagnostic center. By reviewing the literature and combining our findings with previously published data, we demonstrate a negative selection against somatic deleterious NIPBL variants in blood. Furthermore, the analysis of all reported cases indicates an unusual high prevalence of mosaicism in CdLS, occurring in 13.1% of patients with a positive molecular diagnosis. It is worth noting that most of the affected individuals with mosaicism have a clinical phenotype at least as severe as those with constitutive pathogenic variants. However, the type of genetic change does not vary between germline and somatic events and, even in the presence of mosaicism, missense substitutions are located preferentially within the HEAT repeat domain of NIPBL. In conclusion, the high prevalence of mosaicism in CdLS as well as the disparity in tissue distribution provide a novel orientation for the clinical management and genetic counselling of families.
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Affiliation(s)
- Ana Latorre-Pellicer
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Marta Gil-Salvador
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Ilaria Parenti
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Cristina Lucia-Campos
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Laura Trujillano
- Unit of Clinical Genetics, Service of Paediatrics, Hospital Clínico Universitario Lozano Blesa, Department of Paediatrics, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Iñigo Marcos-Alcalde
- Molecular Modelling Group, Centro de Biología Molecular Severo Ochoa, CBMSO (CSIC-UAM), 28049, Madrid, Spain
- Biosciences Research Institute, School of Experimental Sciences, Universidad Francisco de Vitoria, 28223, Pozuelo de Alarcón, Madrid, Spain
| | - María Arnedo
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Ángela Ascaso
- Unit of Clinical Genetics, Service of Paediatrics, Hospital Clínico Universitario Lozano Blesa, Department of Paediatrics, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Ariadna Ayerza-Casas
- Unit of Paediatric Cardiology, Service of Paediatrics, Hospital Universitario Miguel Servet, 50009, Zaragoza, Spain
| | - Rebeca Antoñanzas-Pérez
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Cristina Gervasini
- Genetica Medica, Dipartimento di Scienze della Salute, Università degli Studi di Milano, Milano, Italy
| | - Maria Piccione
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, Palermo, Italy
| | - Milena Mariani
- Centro Fondazione Mariani per il Bambino Fragile, Department of Pediatrics, ASST-Lariana Sant'Anna Hospital, San Fermo della Battaglia (Como), Italy
| | - Axel Weber
- Institute of Human Genetics, Justus-Liebig-University, Giessen, Germany
| | - Deniz Kanber
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Alma Kuechler
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Martin Munteanu
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Katharina Khuller
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
| | - Gloria Bueno-Lozano
- Unit of Clinical Genetics, Service of Paediatrics, Hospital Clínico Universitario Lozano Blesa, Department of Paediatrics, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Beatriz Puisac
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain
| | - Paulino Gómez-Puertas
- Molecular Modelling Group, Centro de Biología Molecular Severo Ochoa, CBMSO (CSIC-UAM), 28049, Madrid, Spain
| | - Angelo Selicorni
- Centro Fondazione Mariani per il Bambino Fragile, Department of Pediatrics, ASST-Lariana Sant'Anna Hospital, San Fermo della Battaglia (Como), Italy
| | - Frank J Kaiser
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Germany
- Essener Zentrum für Seltene Erkrankungen (EZSE), Universitätsmedizin Essen, Universitätsklinikum Essen, Essen, Germany
| | - Feliciano J Ramos
- Unit of Clinical Genetics, Service of Paediatrics, Hospital Clínico Universitario Lozano Blesa, Department of Paediatrics, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain.
| | - Juan Pié
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, Universidad de Zaragoza, CIBERER-GCV02 and IIS-Aragon, 50009, Zaragoza, Spain.
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10
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Bagheri-Fam S, Chen H, Wilson S, Ayers K, Hughes J, Sloan-Bena F, Calvel P, Robevska G, Puisac B, Kusz-Zamelczyk K, Gimelli S, Spik A, Jaruzelska J, Warenik-Szymankiewicz A, Faradz S, Nef S, Pié J, Thomas P, Sinclair A, Wilhelm D. The gene encoding the ketogenic enzyme HMGCS2 displays a unique expression during gonad development in mice. PLoS One 2020; 15:e0227411. [PMID: 31910233 PMCID: PMC6946174 DOI: 10.1371/journal.pone.0227411] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 04/10/2019] [Accepted: 12/18/2019] [Indexed: 11/26/2022] Open
Abstract
Disorders/differences of sex development (DSD) cause profound psychological and reproductive consequences for the affected individuals, however, most are still unexplained at the molecular level. Here, we present a novel gene, 3-hydroxy-3-methylglutaryl coenzyme A synthase 2 (HMGCS2), encoding a metabolic enzyme in the liver important for energy production from fatty acids, that shows an unusual expression pattern in developing fetal mouse gonads. Shortly after gonadal sex determination it is up-regulated in the developing testes following a very similar spatial and temporal pattern as the male-determining gene Sry in Sertoli cells before switching to ovarian enriched expression. To test if Hmgcs2 is important for gonad development in mammals, we pursued two lines of investigations. Firstly, we generated Hmgcs2-null mice using CRISPR/Cas9 and found that these mice had gonads that developed normally even on a sensitized background. Secondly, we screened 46,XY DSD patients with gonadal dysgenesis and identified two unrelated patients with a deletion and a deleterious missense variant in HMGCS2 respectively. However, both variants were heterozygous, suggesting that HMGCS2 might not be the causative gene. Analysis of a larger number of patients in the future might shed more light into the possible association of HMGCS2 with human gonadal development.
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Affiliation(s)
- Stefan Bagheri-Fam
- Department of Anatomy & Neuroscience, The University of Melbourne, Melbourne, Australia
| | - Huijun Chen
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - Sean Wilson
- Murdoch Children’s Research Institute, Melbourne, Australia
| | - Katie Ayers
- Murdoch Children’s Research Institute, Melbourne, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | - James Hughes
- School of Biological Sciences, University of Adelaide, Adelaide, Australia
| | | | - Pierre Calvel
- Department of Genetics, Medicine & Development, University of Geneva, Geneva, Switzerland
| | - Gorjana Robevska
- Murdoch Children’s Research Institute, Melbourne, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | - Beatriz Puisac
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, University of Zaragoza, CIBERER-GCV02 and ISS-Aragon, Zaragoza, Spain
| | | | - Stefania Gimelli
- Service of Genetic Medicine, University Geneva Hospitals, Geneva, Switzerland
| | - Anna Spik
- Institute of Human Genetics, Polish Academy of Sciences, Poznań, Poland
| | | | | | - Sultana Faradz
- Center for Biomedical Research Faculty of Medicine Diponegoro University (FMDU), Semarang, Indonesia
| | - Serge Nef
- Service of Genetic Medicine, University Geneva Hospitals, Geneva, Switzerland
| | - Juan Pié
- Unit of Clinical Genetics and Functional Genomics, Department of Pharmacology-Physiology, School of Medicine, University of Zaragoza, CIBERER-GCV02 and ISS-Aragon, Zaragoza, Spain
| | - Paul Thomas
- School of Biological Sciences, University of Adelaide, Adelaide, Australia
| | - Andrew Sinclair
- Murdoch Children’s Research Institute, Melbourne, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Australia
| | - Dagmar Wilhelm
- Department of Anatomy & Neuroscience, The University of Melbourne, Melbourne, Australia
- * E-mail:
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11
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Vráblová A, Černák J, Falvello LR, Tomás M. Polymorphism of the dinuclear Co III-Schiff base complex [Co 2(o-van-en) 3]·4CH 3CN (o-van-en is a salen-type ligand). Acta Crystallogr C Struct Chem 2019; 75:433-442. [PMID: 30957789 PMCID: PMC6452776 DOI: 10.1107/s2053229619003115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 03/01/2019] [Indexed: 11/10/2022] Open
Abstract
Reactions of Co(OH)2 with the Schiff base bis(2-hydroxy-3-methoxybenzylidene)ethylenediamine, denoted H2(o-van-en), under different conditions yielded the previously reported complex aqua[bis(3-methoxy-2-oxidobenzylidene)ethylenediamine]cobalt(II), [Co(C18H18N2O4)(H2O)], 1, under anaerobic conditions and two polymorphs of [μ-bis(3-methoxy-2-oxidobenzylidene)ethylenediamine]bis{[bis(3-methoxy-2-oxidobenzylidene)ethylenediamine]cobalt(III)} acetonitrile tetrasolvate, [Co2(C18H18N2O4)3]·4CH3CN, i.e. monoclinic 2 and triclinic 3, in the presence of air. Both novel polymorphs were chemically and spectroscopically characterized. Their crystal structures are built up of centrosymmetric dinuclear [Co2(o-van-en)3] complex molecules, in which each CoIII atom is coordinated by one tetradentate dianionic o-van-en ligand in an uncommon bent fashion. The pseudo-octahedral coordination of the CoIII atom is completed by one phenolate O and one amidic N atom of the same arm of the bridging o-van-en ligand. In addition, the asymmetric units of both polymorphs contain two acetonitrile solvent molecules. The polymorphs differ in the packing orders of the dinuclear [Co2(o-van-en)3] complex molecules, i.e. alternating ABABAB in 2 and AAA in 3. In addition, differences in the conformations, the positions of the acetonitrile solvent molecules and the pattern of intermolecular interactions were observed. Hirshfeld surface analysis permits a qualitative inspection of the differences in the intermolecular space in the two polymorphs. A knowledge-based study employing Full Interaction Maps was used to elucidate possible reasons for the polymorphism.
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Affiliation(s)
- Anna Vráblová
- Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, Moyzesova 11, Košice, SK-04154, Slovakia
- Department of Inorganic Chemistry, University of Zaragoza, Pedro Cerbuna 12, Zaragoza, E-50009, Spain
| | - Juraj Černák
- Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University in Košice, Moyzesova 11, Košice, SK-04154, Slovakia
| | - Larry R. Falvello
- Department of Inorganic Chemistry, University of Zaragoza, Pedro Cerbuna 12, Zaragoza, E-50009, Spain
- Aragón Materials Science Institute (ICMA), University of Zaragoza, Pedro Cerbuna 12, Zaragoza, E-50009, Spain
| | - Milagros Tomás
- Department of Inorganic Chemistry, University of Zaragoza, Pedro Cerbuna 12, Zaragoza, E-50009, Spain
- Institute of Chemical Synthesis and Homogeneous Catalysis (ISQCH), University of Zaragoza, Pedro Cerbuna 12, Zaragoza, E-50009, Spain
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12
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Lira-Navarrete E, Hurtado-Guerrero R. A perspective on structural and mechanistic aspects of protein O-fucosylation. Acta Crystallogr F Struct Biol Commun 2018; 74:443-450. [PMID: 30084393 PMCID: PMC6096484 DOI: 10.1107/s2053230x18004788] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 01/16/2018] [Accepted: 03/23/2018] [Indexed: 11/18/2022] Open
Abstract
Protein O-fucosylation is an important post-translational modification (PTM) found in cysteine-rich repeats in proteins. Protein O-fucosyltransferases 1 and 2 (PoFUT1 and PoFUT2) are the enzymes responsible for this PTM and selectively glycosylate specific residues in epidermal growth factor-like (EGF) repeats and thrombospondin type I repeats (TSRs), respectively. Within the past six years, crystal structures of both enzymes have been reported, revealing important information on how they recognize protein substrates and achieve catalysis. Here, the structural information available today is summarized and how PoFUT1 and PoFUT2 employ different catalytic mechanisms is discussed.
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Affiliation(s)
- Erandi Lira-Navarrete
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Ramon Hurtado-Guerrero
- BIFI, University of Zaragoza, BIFI–IQFR (CSIC) Joint Unit, Mariano Esquillor s/n, Campus Rio Ebro, Edificio I+D, Zaragoza, Spain
- Fundación ARAID, Avenida de Ranillas, 50018 Zaragoza, Spain
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13
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Castro M, Falvello LR, Forcén-Vázquez E, Guerra P, Al-Kenany NA, Martínez G, Tomás M. A phase transition caught in mid-course: independent and concomitant analyses of the monoclinic and triclinic structures of ( nBu 4N)[Co(orotate) 2(bipy)]·3H 2O. Acta Crystallogr C Struct Chem 2017; 73:731-742. [PMID: 28872072 PMCID: PMC5601254 DOI: 10.1107/s2053229617010841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 07/24/2017] [Indexed: 11/10/2022] Open
Abstract
The preparation and characterization of the nBu4N+ salts of two bis-orotate(2-) complexes of cobalt, namely bis(tetra-n-butylammonium) diaquabis(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-ide-6-carboxylato-κ2N1,O6)cobalt(II) 1.8-hydrate, (C16H36N)2[Co(C5H2N2O4)2(H2O)2]·1.8H2O, (1), and tetra-n-butylammonium (2,2'-bipyridine-κ2N,N')bis(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-ide-6-carboxylato-κ2N1,O6)cobalt(III) trihydrate, (C16H36N)[Co(C5H2N2O4)2(C10H8N2)]·3H2O, (2), are reported. The CoIII complex, (2), which is monoclinic at room temperature, presents a conservative single-crystal-to-single-crystal phase transition below 200 K, producing a triclinic twin. The transition, which involves a conformational change in one of the nBu groups of the cation, is reversible and can be cycled. Both end phases have been characterized structurally and the system was also characterized structurally in a two-phase intermediate state, using single-crystal diffraction techniques, with both the monoclinic and triclinic phases present. Thermal analysis allows a rough estimate of the small energy content, viz. 0.25 kJ mol-1, for both the monoclinic-to-triclinic transformation and the reverse transition, in agreement with the nature of the structural changes involving only the nBu4N+ cation.
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Affiliation(s)
- Miguel Castro
- Departamento de Ciencia y Tecnología de Materiales y Fluidos, Escuela de Ingeniería y Arquitectura, Instituto de Ciencia de Materiales de Aragón (ICMA), University of Zaragoza–CSIC, María de Luna 3, Zaragoza E-50018, Spain
| | - Larry R. Falvello
- Department of Inorganic Chemistry and Aragón Materials Science Institute (ICMA), University of Zaragoza-CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
| | - Elena Forcén-Vázquez
- Department of Inorganic Chemistry and Aragón Materials Science Institute (ICMA), University of Zaragoza-CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
| | - Pablo Guerra
- Department of Inorganic Chemistry and Aragón Materials Science Institute (ICMA), University of Zaragoza-CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
| | - Nuha A. Al-Kenany
- Department of Inorganic Chemistry and Aragón Materials Science Institute (ICMA), University of Zaragoza-CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
| | - Gema Martínez
- Department of Inorganic Chemistry and Aragón Materials Science Institute (ICMA), University of Zaragoza-CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
| | - Milagros Tomás
- Department of Inorganic Chemistry and Instituto de Síntesis Química y Catálisis Homogenea (ISQCH), University of Zaragoza–CSIC, Pedro Cerbuna 12, Zaragoza E-50009, Spain
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