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Classical cell cycle kinase limits tubulin polyglutamylation and cilium stability.
J Cell Biol
February 2025
Department of Molecular and Cell Biology, University of California, Merced, Merced, CA, USA.
Tubulin polyglutamylation is essential for maintaining cilium stability and function, and defective tubulin polyglutamylation is associated with ciliopathies. However, the regulatory mechanism underlying proper axonemal polyglutamylation remains unclear. He et al.
View Article and Find Full Text PDFHeterodimeric Ciliary Dynein f/I1 Adopts a Distinctive Structure, Providing Insight Into the Autoinhibitory Mechanism Common to the Dynein Family.
Cytoskeleton (Hoboken)
January 2025
Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka, Japan.
Dyneins are huge motor protein complexes that are essential for cell motility, cell division, and intracellular transport. Dyneins are classified into three major subfamilies, namely cytoplasmic, intraflagellar-transport (IFT), and ciliary dyneins, based on their intracellular localization and functions. Recently, several near-atomic resolution structures have been reported for cytoplasmic/IFT dyneins.
View Article and Find Full Text PDFHuman asthenozoospermia: Update on genetic causes, patient management, and clinical strategies.
Andrology
January 2025
Institute for Advanced Biosciences, INSERM U 1209, CNRS UMR 5309, Université Grenoble Alpes, Team "Physiopathology and Pathophysiology of Sperm Cells", Grenoble, France.
Background: In mammals, sperm fertilization potential relies on efficient progression within the female genital tract to reach and fertilize the oocyte. This fundamental property is supported by the flagellum, an evolutionarily conserved organelle, which contains dynein motor proteins that provide the mechanical force for sperm propulsion and motility. Primary motility of the sperm cells is acquired during their transit through the epididymis and hyperactivated motility is acquired throughout the journey in the female genital tract by a process called capacitation.
View Article and Find Full Text PDFDistinct roles of centriole distal appendage proteins in ciliary assembly and disassembly.
Cell Commun Signal
December 2024
Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Republic of Korea.
The primary cilium is a cellular organelle whose assembly and disassembly are closely linked to the cell cycle. The centriole distal appendage (DA) is essential for the early stages of ciliogenesis by anchoring the mother centriole to the cell surface. Despite the identification of over twelve proteins constituting the DA, including CEP83, CEP89, CEP164, FBF1, and SCLT1, their specific functions in ciliary dynamics are not fully understood.
View Article and Find Full Text PDFTXNDC15, an ER-localized thioredoxin-like transmembrane protein, contributes to ciliary transition zone integrity.
J Cell Sci
December 2024
Department of Physiological Chemistry, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
Primary cilia have specific proteins on their membrane to fulfill their sensory functions. Preservation of the specific protein composition of cilia relies on the barrier function of the transition zone (TZ) located at the ciliary base. Defects in cilia and the TZ cause ciliopathies, which have diverse clinical manifestations, including Meckel syndrome (MKS).
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