1
|
Merges GE, Arévalo L, Kovacevic A, Lohanadan K, de Rooij DG, Simon C, Jokwitz M, Witke W, Schorle H. Actl7b deficiency leads to mislocalization of LC8 type dynein light chains and disruption of murine spermatogenesis. Development 2023; 150:dev201593. [PMID: 37800308 PMCID: PMC10652042 DOI: 10.1242/dev.201593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
Actin-related proteins (Arps) are classified according to their similarity to actin and are involved in diverse cellular processes. ACTL7B is a testis-specific Arp, and is highly conserved in rodents and primates. ACTL7B is specifically expressed in round and elongating spermatids during spermiogenesis. Here, we have generated an Actl7b-null allele in mice to unravel the role of ACTL7B in sperm formation. Male mice homozygous for the Actl7b-null allele (Actl7b-/-) were infertile, whereas heterozygous males (Actl7b+/-) were fertile. Severe spermatid defects, such as detached acrosomes, disrupted membranes and flagella malformations start to appear after spermiogenesis step 9 in Actl7b-/- mice, finally resulting in spermatogenic arrest. Abnormal spermatids were degraded and levels of autophagy markers were increased. Co-immunoprecipitation with mass spectrometry experiments identified an interaction between ACTL7B and the LC8 dynein light chains DYNLL1 and DYNLL2, which are first detected in step 9 spermatids and mislocalized when ACTL7B is absent. Our data unequivocally establish that mutations in ACTL7B are directly related to male infertility, pressing for additional research in humans.
Collapse
Affiliation(s)
- Gina E. Merges
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Lena Arévalo
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Andjela Kovacevic
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Keerthika Lohanadan
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Dirk G. de Rooij
- Reproductive Biology Group, Division of Developmental Biology, Department of Biology, Faculty of Science, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Carla Simon
- Cell Migration Unit, Institute of Genetics, University of Bonn, 53115 Bonn, Germany
| | - Melanie Jokwitz
- Cell Migration Unit, Institute of Genetics, University of Bonn, 53115 Bonn, Germany
| | - Walter Witke
- Cell Migration Unit, Institute of Genetics, University of Bonn, 53115 Bonn, Germany
| | - Hubert Schorle
- Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| |
Collapse
|
2
|
Braschi B, Omran H, Witman GB, Pazour GJ, Pfister KK, Bruford EA, King SM. Consensus nomenclature for dyneins and associated assembly factors. J Cell Biol 2022; 221:e202109014. [PMID: 35006274 PMCID: PMC8754002 DOI: 10.1083/jcb.202109014] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/10/2021] [Accepted: 12/13/2021] [Indexed: 12/12/2022] Open
Abstract
Dyneins are highly complex, multicomponent, microtubule-based molecular motors. These enzymes are responsible for numerous motile behaviors in cytoplasm, mediate retrograde intraflagellar transport (IFT), and power ciliary and flagellar motility. Variants in multiple genes encoding dyneins, outer dynein arm (ODA) docking complex subunits, and cytoplasmic factors involved in axonemal dynein preassembly (DNAAFs) are associated with human ciliopathies and are of clinical interest. Therefore, clear communication within this field is particularly important. Standardizing gene nomenclature, and basing it on orthology where possible, facilitates discussion and genetic comparison across species. Here, we discuss how the human gene nomenclature for dyneins, ODA docking complex subunits, and DNAAFs has been updated to be more functionally informative and consistent with that of the unicellular green alga Chlamydomonas reinhardtii, a key model organism for studying dyneins and ciliary function. We also detail additional nomenclature updates for vertebrate-specific genes that encode dynein chains and other proteins involved in dynein complex assembly.
Collapse
Affiliation(s)
- Bryony Braschi
- HUGO Gene Nomenclature Committee, European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, Cambridgeshire, UK
| | - Heymut Omran
- Department of General Pediatrics, University Hospital Muenster, Muenster, Germany
| | - George B. Witman
- Division of Cell Biology and Imaging, Department of Radiology, University of Massachusetts Medical School, Worcester, MA
| | - Gregory J. Pazour
- Program in Molecular Medicine, University of Massachusetts Medical School, Biotech II, Worcester, MA
| | - K. Kevin Pfister
- Cell Biology Department, School of Medicine University of Virginia, Charlottesville, VA
| | - Elspeth A. Bruford
- HUGO Gene Nomenclature Committee, European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, Cambridgeshire, UK
- Department of Haematology, University of Cambridge School of Clinical Medicine, Cambridge, Cambridgeshire, UK
| | - Stephen M. King
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT
| |
Collapse
|
3
|
Felgueiras J, Silva JV, Fardilha M. Adding biological meaning to human protein-protein interactions identified by yeast two-hybrid screenings: A guide through bioinformatics tools. J Proteomics 2018; 171:127-140. [DOI: 10.1016/j.jprot.2017.05.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/26/2017] [Accepted: 05/13/2017] [Indexed: 02/02/2023]
|
4
|
Silva JV, Freitas MJ, Felgueiras J, Fardilha M. The power of the yeast two-hybrid system in the identification of novel drug targets: building and modulating PPP1 interactomes. Expert Rev Proteomics 2015; 12:147-58. [PMID: 25795147 DOI: 10.1586/14789450.2015.1024226] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Since the description of the yeast two-hybrid (Y2H) method, it has become more and more evident that it is the most commonly used method to identify protein-protein interactions (PPIs). The improvements in the original Y2H methodology in parallel with the idea that PPIs are promising drug targets, offer an excellent opportunity to apply the principles of this molecular biology technique to the pharmaceutical field. Additionally, the theoretical developments in the networks field make PPI networks very useful frameworks that facilitate many discoveries in biomedicine. This review highlights the relevance of Y2H in the determination of PPIs, specifically phosphoprotein phosphatase 1 interactions, and its possible outcomes in pharmaceutical research.
Collapse
Affiliation(s)
- Joana Vieira Silva
- Signal Transduction Laboratory, Institute for Research in Biomedicine - iBiMED, Health Sciences Program, University of Aveiro, Aveiro, Portugal
| | | | | | | |
Collapse
|
5
|
Shimoda Y, Okada S, Yamada E, Pessin JE, Yamada M. Tctex1d2 Is a Negative Regulator of GLUT4 Translocation and Glucose Uptake. Endocrinology 2015; 156. [PMID: 26200093 PMCID: PMC5398638 DOI: 10.1210/en.2015-1120] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Tctex1d2 (Tctex1 domain containing 2) is an open reading frame that encodes for a functionally unknown protein that contains a Tctex1 domain found in dynein light chain family members. Examination of gene expression during adipogenesis demonstrated a marked increase in Tctex1d2 protein expression that was essentially undetectable in preadipocytes and markedly induced during 3T3-L1 adipocyte differentiation. Tctex1d2 overexpression significantly inhibited insulin-stimulated glucose transporter 4 (GLUT4) translocation and 2-deoxyglucose uptake. In contrast, Tctex1d2 knockdown significantly increased insulin-stimulated GLUT4 translocation and 2-deoxyglucose uptake. However, acute insulin stimulation (up to 30 min) in 3T3-L1 adipocytes with overexpression or knockdown of Tctex1d2 had no effect on Akt phosphorylation, a critical signal transduction target required for GLUT4 translocation. Although overexpression of Tctex1d2 had no significant effect on GLUT4 internalization, Tctex1d2 was found to associate with syntaxin 4 in an insulin-dependent manner and inhibit Doc2b binding to syntaxin 4. In addition, glucose-dependent insulinotropic polypeptide rescued the Tctex1d2 inhibition of insulin-stimulated GLUT4 translocation by suppressing the Tctex1d2-syntaxin 4 interaction and increasing Doc2b-Synatxin4 interactions. Taking these results together, we hypothesized that Tctex1d2 is a novel syntaxin 4 binding protein that functions as a negative regulator of GLUT4 plasma membrane translocation through inhibition of the Doc2b-syntaxin 4 interaction.
Collapse
Affiliation(s)
- Yoko Shimoda
- Department of Medicine and Molecular Science (Y.S., S.O., E.Y., M.Y.), Gunma University Graduate School of Medicine, Gunma 371-8511, Japan; and Departments of Medicine and Molecular Pharmacology (J.E.P.), Albert Einstein College of Medicine, Bronx, New York 10461
| | - Shuichi Okada
- Department of Medicine and Molecular Science (Y.S., S.O., E.Y., M.Y.), Gunma University Graduate School of Medicine, Gunma 371-8511, Japan; and Departments of Medicine and Molecular Pharmacology (J.E.P.), Albert Einstein College of Medicine, Bronx, New York 10461
| | - Eijiro Yamada
- Department of Medicine and Molecular Science (Y.S., S.O., E.Y., M.Y.), Gunma University Graduate School of Medicine, Gunma 371-8511, Japan; and Departments of Medicine and Molecular Pharmacology (J.E.P.), Albert Einstein College of Medicine, Bronx, New York 10461
| | - Jeffrey E Pessin
- Department of Medicine and Molecular Science (Y.S., S.O., E.Y., M.Y.), Gunma University Graduate School of Medicine, Gunma 371-8511, Japan; and Departments of Medicine and Molecular Pharmacology (J.E.P.), Albert Einstein College of Medicine, Bronx, New York 10461
| | - Masanobu Yamada
- Department of Medicine and Molecular Science (Y.S., S.O., E.Y., M.Y.), Gunma University Graduate School of Medicine, Gunma 371-8511, Japan; and Departments of Medicine and Molecular Pharmacology (J.E.P.), Albert Einstein College of Medicine, Bronx, New York 10461
| |
Collapse
|