1
|
Lindemann CB, Lesich KA. The mechanics of cilia and flagella: What we know and what we need to know. Cytoskeleton (Hoboken) 2024. [PMID: 38780123 DOI: 10.1002/cm.21879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 05/04/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024]
Abstract
In this review, we provide a condensed overview of what is currently known about the mechanical functioning of the flagellar/ciliary axoneme. We also present a list of 10 specific areas where our current knowledge is incomplete and explain the benefits of further experimental investigation. Many of the physical parameters of the axoneme and its component parts have not been determined. This limits our ability to understand how the axoneme structure contributes to its functioning in several regards. It restricts our ability to understand how the mechanics of the structure contribute to the regulation of motor function. It also confines our ability to understand the three-dimensional workings of the axoneme and how various beating modes are accomplished. Lastly, it prevents accurate computational modeling of the axoneme in three-dimensions.
Collapse
Affiliation(s)
- Charles B Lindemann
- Department of Biological Sciences, Oakland University, Rochester, Michigan, USA
| | - Kathleen A Lesich
- Department of Biological Sciences, Oakland University, Rochester, Michigan, USA
| |
Collapse
|
2
|
Olszewska M, Malcher A, Stokowy T, Pollock N, Berman AJ, Budkiewicz S, Kamieniczna M, Jackowiak H, Suszynska-Zajczyk J, Jedrzejczak P, Yatsenko AN, Kurpisz M. Effects of Tcte1 knockout on energy chain transportation and spermatogenesis: implications for male infertility. Hum Reprod Open 2024; 2024:hoae020. [PMID: 38650655 PMCID: PMC11035007 DOI: 10.1093/hropen/hoae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/08/2024] [Indexed: 04/25/2024] Open
Abstract
STUDY QUESTION Is the Tcte1 mutation causative for male infertility? SUMMARY ANSWER Our collected data underline the complex and devastating effect of the single-gene mutation on the testicular molecular network, leading to male reproductive failure. WHAT IS KNOWN ALREADY Recent data have revealed mutations in genes related to axonemal dynein arms as causative for morphology and motility abnormalities in spermatozoa of infertile males, including dysplasia of fibrous sheath (DFS) and multiple morphological abnormalities in the sperm flagella (MMAF). The nexin-dynein regulatory complex (N-DRC) coordinates the dynein arm activity and is built from the DRC1-DRC7 proteins. DRC5 (TCTE1), one of the N-DRC elements, has already been reported as a candidate for abnormal sperm flagella beating; however, only in a restricted manner with no clear explanation of respective observations. STUDY DESIGN SIZE DURATION Using the CRISPR/Cas9 genome editing technique, a mouse Tcte1 gene knockout line was created on the basis of the C57Bl/6J strain. The mouse reproductive potential, semen characteristics, testicular gene expression levels, sperm ATP, and testis apoptosis level measurements were then assessed, followed by visualization of N-DRC proteins in sperm, and protein modeling in silico. Also, a pilot genomic sequencing study of samples from human infertile males (n = 248) was applied for screening of TCTE1 variants. PARTICIPANTS/MATERIALS SETTING METHODS To check the reproductive potential of KO mice, adult animals were crossed for delivery of three litters per caged pair, but for no longer than for 6 months, in various combinations of zygosity. All experiments were performed for wild-type (WT, control group), heterozygous Tcte1+/- and homozygous Tcte1-/- male mice. Gross anatomy was performed on testis and epididymis samples, followed by semen analysis. Sequencing of RNA (RNAseq; Illumina) was done for mice testis tissues. STRING interactions were checked for protein-protein interactions, based on changed expression levels of corresponding genes identified in the mouse testis RNAseq experiments. Immunofluorescence in situ staining was performed to detect the N-DRC complex proteins: Tcte1 (Drc5), Drc7, Fbxl13 (Drc6), and Eps8l1 (Drc3) in mouse spermatozoa. To determine the amount of ATP in spermatozoa, the luminescence level was measured. In addition, immunofluorescence in situ staining was performed to check the level of apoptosis via caspase 3 visualization on mouse testis samples. DNA from whole blood samples of infertile males (n = 137 with non-obstructive azoospermia or cryptozoospermia, n = 111 samples with a spectrum of oligoasthenoteratozoospermia, including n = 47 with asthenozoospermia) was extracted to perform genomic sequencing (WGS, WES, or Sanger). Protein prediction modeling of human-identified variants and the exon 3 structure deleted in the mouse knockout was also performed. MAIN RESULTS AND THE ROLE OF CHANCE No progeny at all was found for the homozygous males which were revealed to have oligoasthenoteratozoospermia, while heterozygous animals were fertile but manifested oligozoospermia, suggesting haploinsufficiency. RNA-sequencing of the testicular tissue showed the influence of Tcte1 mutations on the expression pattern of 21 genes responsible for mitochondrial ATP processing or linked with apoptosis or spermatogenesis. In Tcte1-/- males, the protein was revealed in only residual amounts in the sperm head nucleus and was not transported to the sperm flagella, as were other N-DRC components. Decreased ATP levels (2.4-fold lower) were found in the spermatozoa of homozygous mice, together with disturbed tail:midpiece ratios, leading to abnormal sperm tail beating. Casp3-positive signals (indicating apoptosis) were observed in spermatogonia only, at a similar level in all three mouse genotypes. Mutation screening of human infertile males revealed one novel and five ultra-rare heterogeneous variants (predicted as disease-causing) in 6.05% of the patients studied. Protein prediction modeling of identified variants revealed changes in the protein surface charge potential, leading to disruption in helix flexibility or its dynamics, thus suggesting disrupted interactions of TCTE1 with its binding partners located within the axoneme. LARGE SCALE DATA All data generated or analyzed during this study are included in this published article and its supplementary information files. RNAseq data are available in the GEO database (https://www.ncbi.nlm.nih.gov/geo/) under the accession number GSE207805. The results described in the publication are based on whole-genome or exome sequencing data which includes sensitive information in the form of patient-specific germline variants. Information regarding such variants must not be shared publicly following European Union legislation, therefore access to raw data that support the findings of this study are available from the corresponding author upon reasonable request. LIMITATIONS REASONS FOR CAUTION In the study, the in vitro fertilization performance of sperm from homozygous male mice was not checked. WIDER IMPLICATIONS OF THE FINDINGS This study contains novel and comprehensive data concerning the role of TCTE1 in male infertility. The TCTE1 gene is the next one that should be added to the 'male infertility list' because of its crucial role in spermatogenesis and proper sperm functioning. STUDY FUNDING/COMPETING INTERESTS This work was supported by National Science Centre in Poland, grants no.: 2015/17/B/NZ2/01157 and 2020/37/B/NZ5/00549 (to M.K.), 2017/26/D/NZ5/00789 (to A.M.), and HD096723, GM127569-03, NIH SAP #4100085736 PA DoH (to A.N.Y.). The authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported.
Collapse
Affiliation(s)
- Marta Olszewska
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Agnieszka Malcher
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Tomasz Stokowy
- Scientific Computing Group, IT Division, University of Bergen, Bergen, Norway
| | - Nijole Pollock
- Department of OB/GYN and Reproductive Sciences, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Andrea J Berman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sylwia Budkiewicz
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | - Hanna Jackowiak
- Department of Histology and Embryology, Poznan University of Life Sciences, Poznan, Poland
| | | | - Piotr Jedrzejczak
- Division of Infertility and Reproductive Endocrinology, Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Alexander N Yatsenko
- Department of OB/GYN and Reproductive Sciences, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Maciej Kurpisz
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| |
Collapse
|
3
|
Brody SL, Pan J, Huang T, Xu J, Xu H, Koenitizer J, Brennan SK, Nanjundappa R, Saba TG, Berical A, Hawkins FJ, Wang X, Zhang R, Mahjoub MR, Horani A, Dutcher SK. Loss of an extensive ciliary connectome induces proteostasis and cell fate switching in a severe motile ciliopathy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.20.585965. [PMID: 38562900 PMCID: PMC10983967 DOI: 10.1101/2024.03.20.585965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Motile cilia have essential cellular functions in development, reproduction, and homeostasis. Genetic causes for motile ciliopathies have been identified, but the consequences on cellular functions beyond impaired motility remain unknown. Variants in CCDC39 and CCDC40 cause severe disease not explained by loss of motility. Using human cells with pathological variants in these genes, Chlamydomonas genetics, cryo-electron microscopy, single cell RNA transcriptomics, and proteomics, we identified perturbations in multiple cilia-independent pathways. Absence of the axonemal CCDC39/CCDC40 heterodimer results in loss of a connectome of over 90 proteins. The undocked connectome activates cell quality control pathways, switches multiciliated cell fate, impairs microtubule architecture, and creates a defective periciliary barrier. Both cilia-dependent and independent defects are likely responsible for the disease severity. Our findings provide a foundation for reconsidering the broad cellular impact of pathologic variants in ciliopathies and suggest new directions for therapies.
Collapse
Affiliation(s)
- Steven L Brody
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Jiehong Pan
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Tao Huang
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Jian Xu
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Huihui Xu
- Department of Pediatrics, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Jeffrey Koenitizer
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Steven K Brennan
- Department of Pediatrics, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Rashmi Nanjundappa
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Thomas G Saba
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, 48108, USA
| | - Andrew Berical
- Center for Regenerative Medicine, Boston University, Boston, MA, 02118, USA
| | - Finn J Hawkins
- Center for Regenerative Medicine, Boston University, Boston, MA, 02118, USA
| | - Xiangli Wang
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Rui Zhang
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Moe R Mahjoub
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, 63110, USA
- Department of Cell Biology and Physisology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Amjad Horani
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, 48108, USA
- Department of Cell Biology and Physisology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Susan K Dutcher
- Department of Cell Biology and Physisology, Washington University School of Medicine, Saint Louis, MO, 63110, USA
- Department of Genetics, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| |
Collapse
|
4
|
Hwang J, Yanagisawa H, Davis KC, Hunter EL, Fox LA, Jimenez AR, Goodwin RE, Gordon SA, Stuart CDE, Bower R, Porter ME, Dutcher SK, Sale WS, Lechtreck KF, Alford LM. Assembly of FAP93 at the proximal axoneme in Chlamydomonas cilia. Cytoskeleton (Hoboken) 2024. [PMID: 38224153 DOI: 10.1002/cm.21818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 01/16/2024]
Abstract
To identify proteins specific to the proximal ciliary axoneme, we used iTRAQ to compare short (~2 μm) and full-length (~11 μm) axonemes of Chlamydomonas. Known compoents of the proximal axoneme such as minor dynein heavy chains and LF5 kinase as well as the ciliary tip proteins FAP256 (CEP104) and EB1 were enriched in short axonemes whereas proteins present along the length of the axoneme were of similar abundance in both samples. The iTRAQ analysis revealed that FAP93, a protein of unknown function, and protein phosphatase 2A (PP2A) are enriched in the short axonemes. Consistently, immunoblots show enrichment of FAP93 and PP2A in short axonemes and immunofluorescence confirms the localization of FAP93 and enrichment of PP2A at the proximal axoneme. Ciliary regeneration reveals that FAP93 assembles continuously but more slowly than other axonemal structures and terminates at 1.03 μm in steady-state axonemes. The length of FAP93 assembly correlates with ciliary length, demonstrating ciliary length-dependent assembly of FAP93. Dikaryon rescue experiments show that FAP93 can assemble independently of IFT transport. In addition, FRAP analysis of GFP-tagged FAP93 demonstrates that FAP93 is stably anchored in axoneme. FAP93 may function as a scaffold for assembly of other specific proteins at the proximal axoneme.
Collapse
Affiliation(s)
- Juyeon Hwang
- Department of Cell Biology, Emory University, Atlanta, Georgia, USA
| | | | - Keira C Davis
- Department of Cell Biology, Emory University, Atlanta, Georgia, USA
- College of Arts & Sciences, Clayton State University, Morrow, Georgia, USA
| | - Emily L Hunter
- Department of Cell Biology, Emory University, Atlanta, Georgia, USA
- Science Communication Group, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Laura A Fox
- Department of Cell Biology, Emory University, Atlanta, Georgia, USA
| | - Ariana R Jimenez
- Division of Natural Sciences, Oglethorpe University, Atlanta, Georgia, USA
| | - Reagan E Goodwin
- Division of Natural Sciences, Oglethorpe University, Atlanta, Georgia, USA
| | - Sarah A Gordon
- Division of Natural Sciences, Oglethorpe University, Atlanta, Georgia, USA
| | | | - Raqual Bower
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mary E Porter
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, Minnesota, USA
| | - Susan K Dutcher
- Department of Genetics, Washington University St. Louis, St. Louis, Missouri, USA
| | - Winfield S Sale
- Department of Cell Biology, Emory University, Atlanta, Georgia, USA
| | - Karl F Lechtreck
- Department of Cellular Biology, University of Georgia, Athens, Georgia, USA
| | - Lea M Alford
- Division of Natural Sciences, Oglethorpe University, Atlanta, Georgia, USA
| |
Collapse
|
5
|
Ghanaeian A, Majhi S, McCafferty CL, Nami B, Black CS, Yang SK, Legal T, Papoulas O, Janowska M, Valente-Paterno M, Marcotte EM, Wloga D, Bui KH. Integrated modeling of the Nexin-dynein regulatory complex reveals its regulatory mechanism. Nat Commun 2023; 14:5741. [PMID: 37714832 PMCID: PMC10504270 DOI: 10.1038/s41467-023-41480-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/05/2023] [Indexed: 09/17/2023] Open
Abstract
Cilia are hairlike protrusions that project from the surface of eukaryotic cells and play key roles in cell signaling and motility. Ciliary motility is regulated by the conserved nexin-dynein regulatory complex (N-DRC), which links adjacent doublet microtubules and regulates and coordinates the activity of outer doublet complexes. Despite its critical role in cilia motility, the assembly and molecular basis of the regulatory mechanism are poorly understood. Here, using cryo-electron microscopy in conjunction with biochemical cross-linking and integrative modeling, we localize 12 DRC subunits in the N-DRC structure of Tetrahymena thermophila. We also find that the CCDC96/113 complex is in close contact with the DRC9/10 in the linker region. In addition, we reveal that the N-DRC is associated with a network of coiled-coil proteins that most likely mediates N-DRC regulatory activity.
Collapse
Affiliation(s)
- Avrin Ghanaeian
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Sumita Majhi
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland
| | - Caitlyn L McCafferty
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, TX, USA
| | - Babak Nami
- Genetics and Genome Biology Program, Hospital for Sick Children, Toronto, Canada
| | - Corbin S Black
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Shun Kai Yang
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Thibault Legal
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Ophelia Papoulas
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, TX, USA
| | - Martyna Janowska
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland
- Laboratory of Immunology, Mossakowski Institute of Experimental and Clinical Medicine, Polish Academy of Science, Pawinskiego 5, 02-106, Warsaw, Poland
| | - Melissa Valente-Paterno
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Edward M Marcotte
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, TX, USA
| | - Dorota Wloga
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland.
| | - Khanh Huy Bui
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada.
| |
Collapse
|
6
|
Rocha JJ, Jayaram SA, Stevens TJ, Muschalik N, Shah RD, Emran S, Robles C, Freeman M, Munro S. Functional unknomics: Systematic screening of conserved genes of unknown function. PLoS Biol 2023; 21:e3002222. [PMID: 37552676 PMCID: PMC10409296 DOI: 10.1371/journal.pbio.3002222] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/27/2023] [Indexed: 08/10/2023] Open
Abstract
The human genome encodes approximately 20,000 proteins, many still uncharacterised. It has become clear that scientific research tends to focus on well-studied proteins, leading to a concern that poorly understood genes are unjustifiably neglected. To address this, we have developed a publicly available and customisable "Unknome database" that ranks proteins based on how little is known about them. We applied RNA interference (RNAi) in Drosophila to 260 unknown genes that are conserved between flies and humans. Knockdown of some genes resulted in loss of viability, and functional screening of the rest revealed hits for fertility, development, locomotion, protein quality control, and resilience to stress. CRISPR/Cas9 gene disruption validated a component of Notch signalling and 2 genes contributing to male fertility. Our work illustrates the importance of poorly understood genes, provides a resource to accelerate future research, and highlights a need to support database curation to ensure that misannotation does not erode our awareness of our own ignorance.
Collapse
Affiliation(s)
- João J. Rocha
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | | | - Tim J. Stevens
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | | | - Rajen D. Shah
- Centre for Mathematical Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Sahar Emran
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | - Cristina Robles
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | - Matthew Freeman
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Sean Munro
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| |
Collapse
|
7
|
Ghanaeian A, Majhi S, McCaffrey CL, Nami B, Black CS, Yang SK, Legal T, Papoulas O, Janowska M, Valente-Paterno M, Marcotte EM, Wloga D, Bui KH. Integrated modeling of the Nexin-dynein regulatory complex reveals its regulatory mechanism. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.31.543107. [PMID: 37398254 PMCID: PMC10312493 DOI: 10.1101/2023.05.31.543107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Cilia are hairlike protrusions that project from the surface of eukaryotic cells and play key roles in cell signaling and motility. Ciliary motility is regulated by the conserved nexin-dynein regulatory complex (N-DRC), which links adjacent doublet microtubules and regulates and coordinates the activity of outer doublet complexes. Despite its critical role in cilia motility, the assembly and molecular basis of the regulatory mechanism are poorly understood. Here, utilizing cryo-electron microscopy in conjunction with biochemical cross-linking and integrative modeling, we localized 12 DRC subunits in the N-DRC structure of Tetrahymena thermophila . We also found that the CCDC96/113 complex is in close contact with the N-DRC. In addition, we revealed that the N-DRC is associated with a network of coiled-coil proteins that most likely mediates N-DRC regulatory activity.
Collapse
Affiliation(s)
- Avrin Ghanaeian
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Sumita Majhi
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland
| | - Caitie L McCaffrey
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, United States
| | - Babak Nami
- Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Canada
| | - Corbin S Black
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Shun Kai Yang
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Thibault Legal
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Ophelia Papoulas
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, United States
| | - Martyna Janowska
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland
- current address: Laboratory of Immunology, Mossakowski Institute of Experimental and Clinical Medicine, Polish Academy of Science, Pawinskiego 5, 02-106 Warsaw, Poland
| | - Melissa Valente-Paterno
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| | - Edward M Marcotte
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, United States
| | - Dorota Wloga
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland
| | - Khanh Huy Bui
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, McGill University, Québec, Canada
| |
Collapse
|
8
|
Walton T, Gui M, Velkova S, Fassad MR, Hirst RA, Haarman E, O'Callaghan C, Bottier M, Burgoyne T, Mitchison HM, Brown A. Axonemal structures reveal mechanoregulatory and disease mechanisms. Nature 2023; 618:625-633. [PMID: 37258679 PMCID: PMC10266980 DOI: 10.1038/s41586-023-06140-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 04/27/2023] [Indexed: 06/02/2023]
Abstract
Motile cilia and flagella beat rhythmically on the surface of cells to power the flow of fluid and to enable spermatozoa and unicellular eukaryotes to swim. In humans, defective ciliary motility can lead to male infertility and a congenital disorder called primary ciliary dyskinesia (PCD), in which impaired clearance of mucus by the cilia causes chronic respiratory infections1. Ciliary movement is generated by the axoneme, a molecular machine consisting of microtubules, ATP-powered dynein motors and regulatory complexes2. The size and complexity of the axoneme has so far prevented the development of an atomic model, hindering efforts to understand how it functions. Here we capitalize on recent developments in artificial intelligence-enabled structure prediction and cryo-electron microscopy (cryo-EM) to determine the structure of the 96-nm modular repeats of axonemes from the flagella of the alga Chlamydomonas reinhardtii and human respiratory cilia. Our atomic models provide insights into the conservation and specialization of axonemes, the interconnectivity between dyneins and their regulators, and the mechanisms that maintain axonemal periodicity. Correlated conformational changes in mechanoregulatory complexes with their associated axonemal dynein motors provide a mechanism for the long-hypothesized mechanotransduction pathway to regulate ciliary motility. Structures of respiratory-cilia doublet microtubules from four individuals with PCD reveal how the loss of individual docking factors can selectively eradicate periodically repeating structures.
Collapse
Affiliation(s)
- Travis Walton
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Miao Gui
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Simona Velkova
- Genetics and Genomic Medicine Department, UCL Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Mahmoud R Fassad
- Genetics and Genomic Medicine Department, UCL Great Ormond Street Institute of Child Health, University College London, London, UK
- Department of Human Genetics, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | - Robert A Hirst
- Centre for PCD Diagnosis and Research, Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Eric Haarman
- Department of Pediatric Respiratory Medicine and Allergy, Emma Children's Hospital, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Christopher O'Callaghan
- Infection, Immunity & Inflammation Department, NIHR GOSH BRC, UCL Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Mathieu Bottier
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Thomas Burgoyne
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
- Institute of Ophthalmology, University College London, London, UK
| | - Hannah M Mitchison
- Genetics and Genomic Medicine Department, UCL Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Alan Brown
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
| |
Collapse
|
9
|
Characterization of a DRC1 null variant associated with primary ciliary dyskinesia and female infertility. J Assist Reprod Genet 2023; 40:765-778. [PMID: 36856967 DOI: 10.1007/s10815-023-02755-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 02/14/2023] [Indexed: 03/02/2023] Open
Abstract
PROPOSE We here present a female case with primary ciliary dyskinesia (PCD) and infertility. In this report, we also present the evaluation of the patient family, including her twin sister, also with PCD and infertility. METHODS Confirmation of the PCD clinical diagnosis was performed through assessment of cilia motility, by high-speed video microscopy (HSVM), axoneme ultrastructure, by transmission electron microscopy (TEM), and genetic characterization, by whole-exome sequence (WES). Gene expression studies used qPCR for mRNA expression and immunofluorescence to determine cell protein localization. RESULTS We identified a homozygous nonsense variant in the DRC1 gene (NM 145038.5:c.352C>T (p.Gln118Ter)) in the female patient with PCD and infertility that fit the model of autosomal recessive genetic transmission. This variant eventually results in a dyskinetic ciliary beat with a lower frequency and a partial lack of both dynein arms as revealed by TEM analysis. Moreover, this variant implies a decrease in the expression of DRC1 mRNA and protein. Additionally, expression analysis suggested that DRC1 may interact with other DRC elements. CONCLUSIONS Our findings suggest that the DRC1 null variant leads to PCD associated with infertility, likely caused by defects in axoneme from Fallopian tube cilia. Overall, our outcomes contribute to a better understanding of the genetic factors involved in the pathophysiology of PCD and infertility, and they highlight the interaction of different genes in the patient phenotype, which should be investigated further because it may explain the high heterogeneity observed in PCD patients.
Collapse
|
10
|
Saravanan S, Trischler D, Bower R, Porter M, Lechtreck K. In vivo imaging reveals independent intraflagellar transport of the nexin-dynein regulatory complex subunits DRC2 and DRC4. Mol Biol Cell 2023; 34:br2. [PMID: 36598807 PMCID: PMC9930527 DOI: 10.1091/mbc.e22-11-0524] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/19/2022] [Accepted: 12/23/2022] [Indexed: 01/05/2023] Open
Abstract
Many axonemal proteins enter cilia and flagella on intraflagellar transport (IFT) trains, which move bidirectionally along the axonemal microtubules. Certain axonemal substructures including the radial spokes and outer dynein arms are preassembled in the cell body and transported as multisubunit complexes into flagella by IFT. Here, we used in vivo imaging to analyze the transport and assembly of DRC2 and DRC4, two core subunits of the nexin-dynein regulatory complex (N-DRC). Tagged DRC2 moved by IFT in mutants lacking DRC4 and vice versa, showing that they do not depend on each other for IFT. Simultaneous imaging of tagged DRC2 and DRC4, expressed from transgenes that rescue a corresponding double mutant, mostly showed transport on separate IFT trains, but occasional cotransports were also observed. The results demonstrate that DRC2 and DRC4 are transported largely independently of each other into flagella. These studies suggest that the N-DRC assembles onto the axoneme by the stepwise addition of subunits.
Collapse
Affiliation(s)
- Sahana Saravanan
- Department of Cellular Biology, University of Georgia, Athens, GA 30602
| | - Douglas Trischler
- Department of Genetics, Cell Biology, and Development, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Raqual Bower
- Department of Genetics, Cell Biology, and Development, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Mary Porter
- Department of Genetics, Cell Biology, and Development, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Karl Lechtreck
- Department of Cellular Biology, University of Georgia, Athens, GA 30602
| |
Collapse
|
11
|
DRC3 is an assembly adapter of the nexin-dynein regulatory complex functional components during spermatogenesis in humans and mice. Signal Transduct Target Ther 2023; 8:26. [PMID: 36627292 PMCID: PMC9832115 DOI: 10.1038/s41392-022-01293-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 12/04/2022] [Accepted: 12/11/2022] [Indexed: 01/11/2023] Open
|
12
|
Liu Y, Lei C, Wang R, Yang D, Yang B, Xu Y, Lu C, Wang L, Ding S, Guo T, Liu S, Luo H. Case Report: Whole-Exome Sequencing-Based Copy Number Variation Analysis Identified a Novel DRC1 Homozygous Exon Deletion in a Patient With Primary Ciliary Dyskinesia. Front Genet 2022; 13:940292. [PMID: 35873463 PMCID: PMC9298917 DOI: 10.3389/fgene.2022.940292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/20/2022] [Indexed: 11/21/2022] Open
Abstract
Objective: Whole-exome sequencing (WES) based copy number variation (CNV) analysis has been reported to improve the diagnostic rate in rare genetic diseases. In this study, we aim to find the disease-associated variants in a highly suspected primary ciliary dyskinesia (PCD) patient without a genetic diagnosis by routine WES analysis. Methods: We identified the CNVs using the “Exomedepth” package in an undiagnosed PCD patient with a negative result through routine WES analysis. RNA isolation, PCR amplification, and Sanger sequencing were used to confirm the variant. High-speed video microscopy analysis (HSVA) and immunofluorescence analysis were applied to detect the functional and structural deficiency of nasal cilia and sperm flagella. Papanicolaou staining was employed to characterize the morphology of sperm flagella. Results: NC_000002.11(NM_145038.5): g.26635488_26641606del, c.156-1724_244-2550del, r.156_243del, p. (Glu53Asnfs*13), a novel DRC1 homozygous CNV, was identified by WES-based CNV analysis rather than routine variants calling, in a patient from a non-consanguineous family. HSVA results showed no significant change in ciliary beating frequency but with reduced beating amplitude compared with normal control, and his spermatozoa were almost immotile. The diagnosis of multiple morphological abnormalities of the sperm flagella (MMAF) was established through sperm motility and morphology analysis. PCR amplification and Sanger sequencing confirmed the novel variant of DRC1. Immunofluorescence showed that both cilia and sperm flagella were deficient in protein expression related to the dynein regulatory complex. Conclusion: This report identifies a novel DRC1 disease-associated variant by WES-based CNV analysis from a highly suspected PCD patient with MMAF. Our findings not only expand the genetic spectrum of PCD with MMAF but suggest that in combination with CNV analysis might improve the efficiency of genetic tests.
Collapse
Affiliation(s)
- Ying Liu
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Cheng Lei
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Rongchun Wang
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Danhui Yang
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Binyi Yang
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Yingjie Xu
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Chenyang Lu
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Lin Wang
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Shuizi Ding
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Ting Guo
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Shaokun Liu
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| | - Hong Luo
- Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Research Unit of Respiratory Disease, Central South University, Changsha, China.,Hunan Diagnosis and Treatment Center of Respiratory Disease, Changsha, China
| |
Collapse
|
13
|
Zhou S, Wu H, Zhang J, He X, Liu S, Zhou P, Hua R, Cao Y, Liu M. Bi-allelic variants in human TCTE1/DRC5 cause asthenospermia and male infertility. Eur J Hum Genet 2022; 30:721-729. [PMID: 35388187 DOI: 10.1038/s41431-022-01095-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 03/15/2022] [Accepted: 03/21/2022] [Indexed: 12/21/2022] Open
Abstract
Asthenozoospermia (AZS) is a common male infertility phenotype, accounting for 18% of infertile patients. The N-DRC (Nexin-dynein Regulatory Complex) complex is the motor regulating device in the flagellum, which is found in most eukaryotic organisms with flagellum. The deletion of TCTE1 (T-Complex-Associated Testis-Expressed 1), a component of the N-DRC complex also known as DRC5 (Dynein regulatory complex subunit 5), has been shown to cause asthenospermia in mice. This study mainly introduces a clinical case of male infertility with normal sperm count, normal morphological structure, but low motility and weak forward movement. By whole-exome sequencing, we found that TCTE1 became a frameshift mutant, ENST00000371505.5: c.396_397insTC (p.Arg133Serfs*33), resulting in the rapid degradation of TCTE1 protein and male infertility. This phenotype is similar to the Tcte1-/- (Tcte1 knockout) mice, which showed structural integrity but reduced motility. Further, different from mice, in vitro Fertilization (IVF) could successfully solve the patient's problem of infertility. Our data provides a better understanding of the biological functions of TCTE1 in human flagellum assembly and male fertility.
Collapse
Affiliation(s)
- Shushu Zhou
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Huan Wu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, 230032, China
| | - Jintao Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Xiaojin He
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, 230032, China
| | - Siyu Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Ping Zhou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, 230032, China
| | - Rong Hua
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China. .,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, 230032, China. .,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, 230032, China.
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China. .,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei, 230032, China. .,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, 230032, China.
| | - Mingxi Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China.
| |
Collapse
|
14
|
Weiner E, Pinskey JM, Nicastro D, Otegui MS. Electron microscopy for imaging organelles in plants and algae. PLANT PHYSIOLOGY 2022; 188:713-725. [PMID: 35235662 PMCID: PMC8825266 DOI: 10.1093/plphys/kiab449] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/23/2021] [Indexed: 05/31/2023]
Abstract
Recent developments in both instrumentation and image analysis algorithms have allowed three-dimensional electron microscopy (3D-EM) to increase automated image collections through large tissue volumes using serial block-face scanning EM (SEM) and to achieve near-atomic resolution of macromolecular complexes using cryo-electron tomography (cryo-ET) and sub-tomogram averaging. In this review, we discuss applications of cryo-ET to cell biology research on plant and algal systems and the special opportunities they offer for understanding the organization of eukaryotic organelles with unprecedently resolution. However, one of the most challenging aspects for cryo-ET is sample preparation, especially for multicellular organisms. We also discuss correlative light and electron microscopy (CLEM) approaches that have been developed for ET at both room and cryogenic temperatures.
Collapse
Affiliation(s)
- Ethan Weiner
- Department of Botany, University of Wisconsin, Madison 53706, Wisconsin
- Center for Quantitative Cell Imaging, University of Wisconsin, Madison 53706, Wisconsin
| | - Justine M Pinskey
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas 75390, Texas
| | - Daniela Nicastro
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas 75390, Texas
| | - Marisa S Otegui
- Department of Botany, University of Wisconsin, Madison 53706, Wisconsin
- Center for Quantitative Cell Imaging, University of Wisconsin, Madison 53706, Wisconsin
| |
Collapse
|
15
|
Yogo K. Molecular basis of the morphogenesis of sperm head and tail in mice. Reprod Med Biol 2022; 21:e12466. [PMID: 35619659 PMCID: PMC9126569 DOI: 10.1002/rmb2.12466] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/26/2022] Open
Abstract
Background The spermatozoon has a complex molecular apparatus necessary for fertilization in its head and flagellum. Recently, numerous genes that are needed to construct the molecular apparatus of spermatozoa have been identified through the analysis of genetically modified mice. Methods Based on the literature information, the molecular basis of the morphogenesis of sperm heads and flagella in mice was summarized. Main findings (Results) The molecular mechanisms of vesicular trafficking and intraflagellar transport in acrosome and flagellum formation were listed. With the development of cryo‐electron tomography and mass spectrometry techniques, the details of the axonemal structure are becoming clearer. The fine structure and the proteins needed to form the central apparatus, outer and inner dynein arms, nexin‐dynein regulatory complex, and radial spokes were described. The important components of the formation of the mitochondrial sheath, fibrous sheath, outer dense fiber, and the annulus were also described. The similarities and differences between sperm flagella and Chlamydomonas flagella/somatic cell cilia were also discussed. Conclusion The molecular mechanism of formation of the sperm head and flagellum has been clarified using the mouse as a model. These studies will help to better understand the diversity of sperm morphology and the causes of male infertility.
Collapse
Affiliation(s)
- Keiichiro Yogo
- Department of Applied Life Sciences Faculty of Agriculture Shizuoka University Shizuoka Japan
| |
Collapse
|
16
|
Ben Braiek M, Moreno-Romieux C, Allain C, Bardou P, Bordes A, Debat F, Drögemüller C, Plisson-Petit F, Portes D, Sarry J, Tadi N, Woloszyn F, Fabre S. A Nonsense Variant in CCDC65 Gene Causes Respiratory Failure Associated with Increased Lamb Mortality in French Lacaune Dairy Sheep. Genes (Basel) 2021; 13:genes13010045. [PMID: 35052387 PMCID: PMC8774411 DOI: 10.3390/genes13010045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/16/2021] [Accepted: 12/20/2021] [Indexed: 12/04/2022] Open
Abstract
We recently demonstrated that the Lacaune deficient homozygous haplotype 6 (LDHH6) potentially hosts a recessive perinatal lethal mutation in Lacaune dairy sheep mapped on OAR3. In the present study, we have analyzed the whole-genome sequences of two Lacaune ram heterozygous carriers of LDHH6. After variant calling and filtering against the variants of 86 non-carrier rams, we have identified a single nucleotide variant (SNV) in the two LDHH6 carriers whose variant allele induced a premature stop codon (p.Glu111*) in the Coiled-Coil Domain Containing 65 (CCDC65) gene. CCDC65 is involved in the assembly of the nexin-dynein regulatory complex for the formation of microtubules in ciliated cells. In order to identify the phenotype in homozygous sheep, we generated at-risk matings (n = 17) between rams and ewes heterozygous for the candidate variant in CCDC65. A total of 16 lambs were born alive with five genotyped as homozygous carriers. The homozygous lambs suffered from respiratory problems, and four of them died within the first month of life. At necropsy, we observed a broad hepatization of lung lobes possibly induced by infectious pneumonia. The management of this lethal recessive allele (frequency of 0.06) through reasoned mating in the Lacaune sheep selection schemes could reduce lamb mortality by 2%.
Collapse
Affiliation(s)
- Maxime Ben Braiek
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Carole Moreno-Romieux
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Charlotte Allain
- UE Domaine de La Fage, Institut National de Recherche Pour L’agriculture, L’alimentation et L’environnement (INRAE), 12250 Saint-Jean et Saint-Paul, France; (C.A.); (D.P.)
| | - Philippe Bardou
- Sigenae, Institut National de Recherche Pour L’agriculture, L’alimentation et L’environnement (INRAE), 31326 Castanet-Tolosan, France;
| | - Arnaud Bordes
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Frédéric Debat
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Cord Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland;
| | - Florence Plisson-Petit
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - David Portes
- UE Domaine de La Fage, Institut National de Recherche Pour L’agriculture, L’alimentation et L’environnement (INRAE), 12250 Saint-Jean et Saint-Paul, France; (C.A.); (D.P.)
| | - Julien Sarry
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Némuel Tadi
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Florent Woloszyn
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
| | - Stéphane Fabre
- GenPhySE, Université de Toulouse, Institut National de Recherche Pour L’agriculture, L’alimentation et l’environnement (INRAE), Ecole Nationale Vétérinaire de Toulouse (ENVT), 31326 Castanet-Tolosan, France; (M.B.B.); (C.M.-R.); (A.B.); (F.D.); (F.P.-P.); (J.S.); (N.T.); (F.W.)
- Correspondence:
| |
Collapse
|
17
|
Cai K, Zhao Y, Zhao L, Phan N, Hou Y, Cheng X, Witman GB, Nicastro D. Structural organization of the C1b projection within the ciliary central apparatus. J Cell Sci 2021; 134:272503. [PMID: 34651179 DOI: 10.1242/jcs.254227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 09/29/2021] [Indexed: 12/23/2022] Open
Abstract
Motile cilia have a '9+2' structure containing nine doublet microtubules and a central apparatus (CA) composed of two singlet microtubules with associated projections. The CA plays crucial roles in regulating ciliary motility. Defects in CA assembly or function usually result in motility-impaired or paralyzed cilia, which in humans causes disease. Despite their importance, the protein composition and functions of most CA projections remain largely unknown. Here, we combined genetic, proteomic and cryo-electron tomographic approaches to compare the CA of wild-type Chlamydomonas reinhardtii with those of three CA mutants. Our results show that two proteins, FAP42 and FAP246, are localized to the L-shaped C1b projection of the CA, where they interact with the candidate CA protein FAP413. FAP42 is a large protein that forms the peripheral 'beam' of the C1b projection, and the FAP246-FAP413 subcomplex serves as the 'bracket' between the beam (FAP42) and the C1b 'pillar' that attaches the projection to the C1 microtubule. The FAP246-FAP413-FAP42 complex is essential for stable assembly of the C1b, C1f and C2b projections, and loss of these proteins leads to ciliary motility defects.
Collapse
Affiliation(s)
- Kai Cai
- Departments of Cell Biology and Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75231, USA
| | - Yanhe Zhao
- Departments of Cell Biology and Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75231, USA
| | - Lei Zhao
- Division of Cell Biology and Imaging, Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Nhan Phan
- Departments of Cell Biology and Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75231, USA
| | - Yuqing Hou
- Division of Cell Biology and Imaging, Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Xi Cheng
- Division of Cell Biology and Imaging, Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - George B Witman
- Division of Cell Biology and Imaging, Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Daniela Nicastro
- Departments of Cell Biology and Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75231, USA
| |
Collapse
|
18
|
Fabritius AS, Bayless BA, Li S, Stoddard D, Heydeck W, Ebmeier CC, Anderson L, Gunnels T, Nachiappan C, Whittall JB, Old W, Agard DA, Nicastro D, Winey M. Proteomic analysis of microtubule inner proteins (MIPs) in Rib72 null Tetrahymena cells reveals functional MIPs. Mol Biol Cell 2021; 32:br8. [PMID: 34406789 PMCID: PMC8693976 DOI: 10.1091/mbc.e20-12-0786] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The core structure of motile cilia and flagella, the axoneme, is built from a stable population of doublet microtubules. This unique stability is brought about, at least in part, by a network of microtubule inner proteins (MIPs) that are bound to the luminal side of the microtubule walls. Rib72A and Rib72B were identified as MIPs in the motile cilia of the protist Tetrahymena thermophila. Loss of these proteins leads to ciliary defects and loss of additional MIPs. We performed mass spectrometry coupled with proteomic analysis and bioinformatics to identify the MIPs lost in RIB72A/B knockout Tetrahymena axonemes. We identified a number of candidate MIPs and pursued one, Fap115, for functional characterization. We find that loss of Fap115 results in disrupted cell swimming and aberrant ciliary beating. Cryo-electron tomography reveals that Fap115 localizes to MIP6a in the A-tubule of the doublet microtubules. Overall, our results highlight the complex relationship between MIPs, ciliary structure, and ciliary function.
Collapse
Affiliation(s)
- Amy S Fabritius
- Department of Molecular and Cellular Biology, University of California Davis, Davis, CA 95616
| | - Brian A Bayless
- Department of Molecular and Cellular Biology, University of California Davis, Davis, CA 95616.,Department of Biology, Santa Clara University, Santa Clara, CA 95053
| | - Sam Li
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA 94158
| | - Daniel Stoddard
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Westley Heydeck
- Department of Molecular Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO 80309
| | - Christopher C Ebmeier
- Department of Molecular Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO 80309
| | - Lauren Anderson
- Department of Molecular and Cellular Biology, University of California Davis, Davis, CA 95616
| | - Tess Gunnels
- Department of Biology, Santa Clara University, Santa Clara, CA 95053
| | | | - Justen B Whittall
- Department of Biology, Santa Clara University, Santa Clara, CA 95053
| | - William Old
- Department of Molecular Cellular and Developmental Biology, University of Colorado Boulder, Boulder, CO 80309
| | - David A Agard
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA 94158
| | - Daniela Nicastro
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Mark Winey
- Department of Molecular and Cellular Biology, University of California Davis, Davis, CA 95616
| |
Collapse
|
19
|
Fu G, Scarbrough C, Song K, Phan N, Wirschell M, Nicastro D. Structural organization of the intermediate and light chain complex of Chlamydomonas ciliary I1 dynein. FASEB J 2021; 35:e21646. [PMID: 33993568 DOI: 10.1096/fj.202001857r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 04/01/2021] [Accepted: 04/21/2021] [Indexed: 12/18/2022]
Abstract
Axonemal I1 dynein (dynein f) is the largest inner dynein arm in cilia and a key regulator of ciliary beating. It consists of two dynein heavy chains, and an intermediate chain/light chain (ICLC) complex. However, the structural organization of the nine ICLC subunits remains largely unknown. Here, we used biochemical and genetic approaches, and cryo-electron tomography imaging in Chlamydomonas to dissect the molecular architecture of the I1 dynein ICLC complex. Using a strain expressing SNAP-tagged IC140, tomography revealed the location of the IC140 N-terminus at the proximal apex of the ICLC structure. Mass spectrometry of a tctex2b mutant showed that TCTEX2B dynein light chain is required for the stable assembly of TCTEX1 and inner dynein arm interacting proteins IC97 and FAP120. The structural defects observed in tctex2b located these 4 subunits in the center and bottom regions of the ICLC structure, which overlaps with the location of the IC138 regulatory subcomplex, which contains IC138, IC97, FAP120, and LC7b. These results reveal the three-dimensional organization of the native ICLC complex and indicate potential protein-protein interactions that are involved in the pathway by which I1 regulates ciliary motility.
Collapse
Affiliation(s)
- Gang Fu
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
| | - Chasity Scarbrough
- Department of Cell and Molecular Biology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Kangkang Song
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Nhan Phan
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Maureen Wirschell
- Department of Cell and Molecular Biology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Daniela Nicastro
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| |
Collapse
|
20
|
Zhang J, He X, Wu H, Zhang X, Yang S, Liu C, Liu S, Hua R, Zhou S, Zhao S, Hu F, Zhang J, Liu W, Cheng H, Gao Y, Zhang F, Cao Y, Liu M. Loss of DRC1 function leads to multiple morphological abnormalities of the sperm flagella and male infertility in human and mouse. Hum Mol Genet 2021; 30:1996-2011. [PMID: 34169321 PMCID: PMC8522639 DOI: 10.1093/hmg/ddab171] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 12/28/2022] Open
Abstract
Motile cilia and flagellar defects can result in primary ciliary dyskinesia, which is a
multisystemic genetic disorder that affects roughly 1:10 000 individuals. The nexin-dynein
regulatory complex (N-DRC) links neighboring doublet microtubules within flagella, serving
as a central regulatory hub for motility in Chlamydomonas. Herein, we identified two
homozygous DRC1 variants in human patients that were associated with
multiple morphological abnormalities of the sperm flagella (MMAF) and male infertility.
Drc1−/−, Drc1R554X/R554X and
Drc1W244X/W244X mice on the C57BL/6 background suffered from
pre-pubertal mortality. However, when the ICR background was introduced, some of these
mice were able to survive and recapitulate the MMAF phenotypes detected in human patients.
By analyzing these animals, we determined that DRC1 is an essential regulator of N-DRC
assembly in cilia and flagella. When DRC1 is absent, this results in the shortening of
cilia and consequent impairment of their motility. Damage associated with DRC1 deficiency
in sperm flagella was more pronounced than in cilia, as manifested by complete axoneme
structural disorder in addition to the loss of the DRC structure. Altogether, these
findings suggest that DRC1 is required for the structural stability of flagella but not
cilia, emphasizing the key role of this protein in mammalian species.
Collapse
Affiliation(s)
- Jintao Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Xiaojin He
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China
| | - Huan Wu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China
| | - Xin Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Shenmin Yang
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Hospital Affiliated to Nanjing Medical University, Suzhou 215002, China
| | - Chunyu Liu
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai 200011, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Siyu Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Rong Hua
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Shushu Zhou
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Shuqin Zhao
- State Key Laboratory of Reproductive Medicine, Animal Core Facility of Nanjing Medical University, Nanjing 211166, China
| | - Fan Hu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, 211166, China
| | - Junqiang Zhang
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China.,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei 230032, China
| | - Wangjie Liu
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai 200011, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Huiru Cheng
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China.,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei 230032, China
| | - Yang Gao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China
| | - Feng Zhang
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai 200011, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai 200011, China
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), Hefei 230032, China.,Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei 230032, China
| | - Mingxi Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| |
Collapse
|
21
|
Abstract
Dyneins make up a family of AAA+ motors that move toward the minus end of microtubules. Cytoplasmic dynein is responsible for transporting intracellular cargos in interphase cells and mediating spindle assembly and chromosome positioning during cell division. Other dynein isoforms transport cargos in cilia and power ciliary beating. Dyneins were the least studied of the cytoskeletal motors due to challenges in the reconstitution of active dynein complexes in vitro and the scarcity of high-resolution methods for in-depth structural and biophysical characterization of these motors. These challenges have been recently addressed, and there have been major advances in our understanding of the activation, mechanism, and regulation of dyneins. This review synthesizes the results of structural and biophysical studies for each class of dynein motors. We highlight several outstanding questions about the regulation of bidirectional transport along microtubules and the mechanisms that sustain self-coordinated oscillations within motile cilia.
Collapse
Affiliation(s)
- John T Canty
- Biophysics Graduate Group, University of California, Berkeley, California 94720, USA;
| | - Ruensern Tan
- Department of Molecular and Cellular Biology, University of California, Berkeley, California 94720, USA
| | - Emre Kusakci
- Biophysics Graduate Group, University of California, Berkeley, California 94720, USA;
| | - Jonathan Fernandes
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Ahmet Yildiz
- Biophysics Graduate Group, University of California, Berkeley, California 94720, USA; .,Department of Molecular and Cellular Biology, University of California, Berkeley, California 94720, USA.,Physics Department, University of California, Berkeley, California 94720, USA
| |
Collapse
|
22
|
Bazan R, Schröfel A, Joachimiak E, Poprzeczko M, Pigino G, Wloga D. Ccdc113/Ccdc96 complex, a novel regulator of ciliary beating that connects radial spoke 3 to dynein g and the nexin link. PLoS Genet 2021; 17:e1009388. [PMID: 33661892 PMCID: PMC7987202 DOI: 10.1371/journal.pgen.1009388] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 03/23/2021] [Accepted: 01/28/2021] [Indexed: 11/19/2022] Open
Abstract
Ciliary beating requires the coordinated activity of numerous axonemal complexes. The protein composition and role of radial spokes (RS), nexin links (N-DRC) and dyneins (ODAs and IDAs) is well established. However, how information is transmitted from the central apparatus to the RS and across other ciliary structures remains unclear. Here, we identify a complex comprising the evolutionarily conserved proteins Ccdc96 and Ccdc113, positioned parallel to N-DRC and forming a connection between RS3, dynein g, and N-DRC. Although Ccdc96 and Ccdc113 can be transported to cilia independently, their stable docking and function requires the presence of both proteins. Deletion of either CCDC113 or CCDC96 alters cilia beating frequency, amplitude and waveform. We propose that the Ccdc113/Ccdc96 complex transmits signals from RS3 and N-DRC to dynein g and thus regulates its activity and the ciliary beat pattern.
Collapse
Affiliation(s)
- Rafał Bazan
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Adam Schröfel
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Ewa Joachimiak
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Martyna Poprzeczko
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Gaia Pigino
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
- Human Technopole, Milan, Italy
- * E-mail: (GP); (DW)
| | - Dorota Wloga
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
- * E-mail: (GP); (DW)
| |
Collapse
|
23
|
Gadadhar S, Alvarez Viar G, Hansen JN, Gong A, Kostarev A, Ialy-Radio C, Leboucher S, Whitfield M, Ziyyat A, Touré A, Alvarez L, Pigino G, Janke C. Tubulin glycylation controls axonemal dynein activity, flagellar beat, and male fertility. Science 2021; 371:371/6525/eabd4914. [PMID: 33414192 DOI: 10.1126/science.abd4914] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/13/2020] [Accepted: 11/18/2020] [Indexed: 12/30/2022]
Abstract
Posttranslational modifications of the microtubule cytoskeleton have emerged as key regulators of cellular functions, and their perturbations have been linked to a growing number of human pathologies. Tubulin glycylation modifies microtubules specifically in cilia and flagella, but its functional and mechanistic roles remain unclear. In this study, we generated a mouse model entirely lacking tubulin glycylation. Male mice were subfertile owing to aberrant beat patterns of their sperm flagella, which impeded the straight swimming of sperm cells. Using cryo-electron tomography, we showed that lack of glycylation caused abnormal conformations of the dynein arms within sperm axonemes, providing the structural basis for the observed dysfunction. Our findings reveal the importance of microtubule glycylation for controlled flagellar beating, directional sperm swimming, and male fertility.
Collapse
Affiliation(s)
- Sudarshan Gadadhar
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France. .,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
| | - Gonzalo Alvarez Viar
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany
| | - Jan Niklas Hansen
- Institute of Innate Immunity, Medical Faculty, University of Bonn, D-53127 Bonn, Germany
| | - An Gong
- Center of Advanced European Studies and Research, D-53175 Bonn, Germany
| | - Aleksandr Kostarev
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany
| | - Côme Ialy-Radio
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Sophie Leboucher
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France.,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
| | - Marjorie Whitfield
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Ahmed Ziyyat
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France.,Service d'histologie, d'embryologie, Biologie de la reproduction, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, F-75014 Paris, France
| | - Aminata Touré
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 Paris, France
| | - Luis Alvarez
- Center of Advanced European Studies and Research, D-53175 Bonn, Germany.
| | - Gaia Pigino
- Max Planck Institute of Molecular Cell Biology and Genetics, D-01307 Dresden, Germany. .,Human Technopole, I-20157 Milan, Italy
| | - Carsten Janke
- Institut Curie, Université PSL, CNRS UMR3348, F-91400 Orsay, France. .,Université Paris-Saclay, CNRS UMR3348, F-91400 Orsay, France
| |
Collapse
|
24
|
Petriman NA, Lorentzen E. Structural insights into the architecture and assembly of eukaryotic flagella. MICROBIAL CELL (GRAZ, AUSTRIA) 2020; 7:289-299. [PMID: 33150161 PMCID: PMC7590530 DOI: 10.15698/mic2020.11.734] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/07/2020] [Accepted: 09/14/2020] [Indexed: 12/16/2022]
Abstract
Cilia and flagella are slender projections found on most eukaryotic cells including unicellular organisms such as Chlamydomonas, Trypanosoma and Tetrahymena, where they serve motility and signaling functions. The cilium is a large molecular machine consisting of hundreds of different proteins that are trafficked into the organelle to organize a repetitive microtubule-based axoneme. Several recent studies took advantage of improved cryo-EM methodology to unravel the high-resolution structures of ciliary complexes. These include the recently reported purification and structure determination of axonemal doublet microtubules from the green algae Chlamydomonas reinhardtii, which allows for the modeling of more than 30 associated protein factors to provide deep molecular insight into the architecture and repetitive nature of doublet microtubules. In addition, we will review several recent contributions that dissect the structure and function of ciliary trafficking complexes that ferry structural and signaling components between the cell body and the cilium organelle.
Collapse
Affiliation(s)
- Narcis-Adrian Petriman
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10c, DK-8000 Aarhus C, Denmark
| | - Esben Lorentzen
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10c, DK-8000 Aarhus C, Denmark
| |
Collapse
|
25
|
Oura S, Kazi S, Savolainen A, Nozawa K, Castañeda J, Yu Z, Miyata H, Matzuk RM, Hansen JN, Wachten D, Matzuk MM, Prunskaite-Hyyryläinen R. Cfap97d1 is important for flagellar axoneme maintenance and male mouse fertility. PLoS Genet 2020; 16:e1008954. [PMID: 32785227 PMCID: PMC7444823 DOI: 10.1371/journal.pgen.1008954] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 08/24/2020] [Accepted: 06/24/2020] [Indexed: 11/18/2022] Open
Abstract
The flagellum is essential for sperm motility and fertilization in vivo. The axoneme is the main component of the flagella, extending through its entire length. An axoneme is comprised of two central microtubules surrounded by nine doublets, the nexin-dynein regulatory complex, radial spokes, and dynein arms. Failure to properly assemble components of the axoneme in a sperm flagellum, leads to fertility alterations. To understand this process in detail, we have defined the function of an uncharacterized gene, Cfap97 domain containing 1 (Cfap97d1). This gene is evolutionarily conserved in mammals and multiple other species, including Chlamydomonas. We have used two independently generated Cfap97d1 knockout mouse models to study the gene function in vivo. Cfap97d1 is exclusively expressed in testes starting from post-natal day 20 and continuing throughout adulthood. Deletion of the Cfap97d1 gene in both mouse models leads to sperm motility defects (asthenozoospermia) and male subfertility. In vitro fertilization (IVF) of cumulus-intact oocytes with Cfap97d1 deficient sperm yielded few embryos whereas IVF with zona pellucida-free oocytes resulted in embryo numbers comparable to that of the control. Knockout spermatozoa showed abnormal motility characterized by frequent stalling in the anti-hook position. Uniquely, Cfap97d1 loss caused a phenotype associated with axonemal doublet heterogeneity linked with frequent loss of the fourth doublet in the sperm stored in the epididymis. This study demonstrates that Cfap97d1 is required for sperm flagellum ultra-structure maintenance, thereby playing a critical role in sperm function and male fertility in mice.
Collapse
Affiliation(s)
- Seiya Oura
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Samina Kazi
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Audrey Savolainen
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Kaori Nozawa
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Texas, United States of America
- Center for Drug Discovery, Baylor College of Medicine, Houston, Texas, United States of America
| | - Julio Castañeda
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Zhifeng Yu
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Texas, United States of America
- Center for Drug Discovery, Baylor College of Medicine, Houston, Texas, United States of America
| | - Haruhiko Miyata
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Ryan M. Matzuk
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Texas, United States of America
- Center for Drug Discovery, Baylor College of Medicine, Houston, Texas, United States of America
| | - Jan N. Hansen
- Institute of Innate Immunity, Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - Dagmar Wachten
- Institute of Innate Immunity, Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - Martin M. Matzuk
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, Texas, United States of America
- Center for Drug Discovery, Baylor College of Medicine, Houston, Texas, United States of America
| | | |
Collapse
|
26
|
Morohoshi A, Miyata H, Shimada K, Nozawa K, Matsumura T, Yanase R, Shiba K, Inaba K, Ikawa M. Nexin-Dynein regulatory complex component DRC7 but not FBXL13 is required for sperm flagellum formation and male fertility in mice. PLoS Genet 2020; 16:e1008585. [PMID: 31961863 PMCID: PMC6994161 DOI: 10.1371/journal.pgen.1008585] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 01/31/2020] [Accepted: 12/29/2019] [Indexed: 01/28/2023] Open
Abstract
Flagella and cilia are evolutionarily conserved cellular organelles. Abnormal formation or motility of these organelles in humans causes several syndromic diseases termed ciliopathies. The central component of flagella and cilia is the axoneme that is composed of the ‘9+2’ microtubule arrangement, dynein arms, radial spokes, and the Nexin-Dynein Regulatory Complex (N-DRC). The N-DRC is localized between doublet microtubules and has been extensively studied in the unicellular flagellate Chlamydomonas. Recently, it has been reported that TCTE1 (DRC5), a component of the N-DRC, is essential for proper sperm motility and male fertility in mice. Further, TCTE1 has been shown to interact with FBXL13 (DRC6) and DRC7; however, functional roles of FBXL13 and DRC7 in mammals have not been elucidated. Here we show that Fbxl13 and Drc7 expression are testes-enriched in mice. Although Fbxl13 knockout (KO) mice did not show any obvious phenotypes, Drc7 KO male mice were infertile due to their short immotile spermatozoa. In Drc7 KO spermatids, the axoneme is disorganized and the ‘9+2’ microtubule arrangement was difficult to detect. Further, other N-DRC components fail to incorporate into the flagellum without DRC7. These results indicate that Drc7, but not Fbxl13, is essential for the correct assembly of the N-DRC and flagella. In recent years, almost one in six couples face infertility, and nearly 50% of cases are attributed to male factors. It has been shown that approximately 15% of male infertility is caused by genetic factors. The conditions of male infertility mainly include spermatozoa with abnormal morphology (teratozoospermia), reduced sperm motility (asthenozoospermia), and no or low sperm count (azoospermia). Multiple morphological abnormalities of the sperm flagella (MMAF) are characterized as asthenoteratozoospermia, which is a condition with abnormal sperm tail morphology, including absent, coiled, bent, or short tails. Sperm tails are formed during spermiogenesis; however, the mechanism that govern tail formation remains unclear. Here we mutated Fbxl13 and Drc7, two genes with strong expression in mouse testis and which have been shown to be important for flagellum formation and regulation in other systems. Deletion of Drc7 leads to aberrant tail formation in mouse spermatozoa that phenocopies patients with MMAF, while deletion of Fbxl13 has no observable effect on sperm function. Our results identified DRC7 as an important factor for sperm flagellum formation.
Collapse
Affiliation(s)
- Akane Morohoshi
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Haruhiko Miyata
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Keisuke Shimada
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Kaori Nozawa
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Takafumi Matsumura
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Ryuji Yanase
- Shimoda Marine Research Center, University of Tsukuba, Shizuoka, Japan
| | - Kogiku Shiba
- Shimoda Marine Research Center, University of Tsukuba, Shizuoka, Japan
| | - Kazuo Inaba
- Shimoda Marine Research Center, University of Tsukuba, Shizuoka, Japan
| | - Masahito Ikawa
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Graduate School of Medicine, Osaka University, Osaka, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- * E-mail:
| |
Collapse
|