National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
RO1 GM127571
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM118099
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
1S10OD020054
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
1S10OD021741
米国
引用
ジャーナル: Mol Biol Cell / 年: 2021 タイトル: Proteomic analysis of microtubule inner proteins (MIPs) in Rib72 null cells reveals functional MIPs. 著者: Amy S Fabritius / Brian A Bayless / Sam Li / Daniel Stoddard / Westley Heydeck / Christopher C Ebmeier / Lauren Anderson / Tess Gunnels / Chidambaram Nachiappan / Justen B Whittall / William ...著者: Amy S Fabritius / Brian A Bayless / Sam Li / Daniel Stoddard / Westley Heydeck / Christopher C Ebmeier / Lauren Anderson / Tess Gunnels / Chidambaram Nachiappan / Justen B Whittall / William Old / David A Agard / Daniela Nicastro / Mark Winey / 要旨: 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 ...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 . 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 knockout 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.