National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM083122
米国
Cancer Prevention and Research Institute of Texas (CPRIT)
RR140082
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM130289
米国
引用
ジャーナル: Nat Struct Mol Biol / 年: 2025 タイトル: Mouse radial spoke 3 is a metabolic and regulatory hub in cilia. 著者: Yanhe Zhao / Kangkang Song / Amirrasoul Tavakoli / Long Gui / Angeles Fernandez-Gonzalez / Song Zhang / Petras P Dzeja / S Alex Mitsialis / Xuewu Zhang / Daniela Nicastro / 要旨: Cilia are microtubule-based organelles that have important roles in cell sensing, signaling and motility. Recent studies have revealed the atomic structures of many multicomponent ciliary complexes, ...Cilia are microtubule-based organelles that have important roles in cell sensing, signaling and motility. Recent studies have revealed the atomic structures of many multicomponent ciliary complexes, elucidating their mechanisms of action. However, little is known about the structure, proteome and function of full-length radial spoke 3 (RS3), a conserved complex that transmits mechanochemical signals to coordinate ciliary motility. Here, we combined single-particle cryo-electron microscopy, cryo-electron tomography, proteomic analysis and computational modeling to determine the three-dimensional structure and atomic model of RS3 from mouse respiratory cilia. We reveal all RS3 components, including regulatory and metabolic enzymes such as a protein kinase A subunit, adenylate kinases (AKs) and malate dehydrogenases. Furthermore, we confirm RS3 loss in AK7-deficient mice, which exhibit motility defects. Our findings identify RS3 as an important regulatory and metabolic hub that maintains sufficient adenosine triphosphate for sustained ciliary beating, providing insights into the etiology of ciliopathies.
凍結剤: ETHANE 詳細: 4 microliters of splayed axoneme sample were applied to glow-discharged Quantifoil R2/2 Cu grids. After removing excess liquid by blotting the grid from the backside with Whatman filter paper ...詳細: 4 microliters of splayed axoneme sample were applied to glow-discharged Quantifoil R2/2 Cu grids. After removing excess liquid by blotting the grid from the backside with Whatman filter paper for 2-3 s, the grid was immediately plunge-frozen in liquid ethane using a home-made plunge freezer..
モデルのタイプ: INSILICO MODEL In silico モデル: For the RS3 head, neck, and stalk, the AlphaFold2 models of mouse were used. 詳細: For the RS3 base, the PDB entry 8J07 was used as starting.