View source for 8snb


==atomic model of sea urchin sperm doublet microtubule (48-nm periodicity)==
<SX load='8snb' size='340' side='right' viewer='molstar' caption='[[8snb]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8snb]] is a 35 chain structure with sequence from [https://en.wikipedia.org/wiki/Strongylocentrotus_purpuratus Strongylocentrotus purpuratus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8SNB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8SNB FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.3&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8snb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8snb OCA], [https://pdbe.org/8snb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8snb RCSB], [https://www.ebi.ac.uk/pdbsum/8snb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8snb ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/A0A7M7RHZ2_STRPU A0A7M7RHZ2_STRPU] Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia axoneme, which is required for motile cilia beating.[ARBA:ARBA00035003]
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== Publication Abstract from PubMed ==
Sperm motility is crucial to reproductive success in sexually reproducing organisms. Impaired sperm movement causes male infertility, which is increasing globally. Sperm are powered by a microtubule-based molecular machine-the axoneme-but it is unclear how axonemal microtubules are ornamented to support motility in diverse fertilization environments. Here, we present high-resolution structures of native axonemal doublet microtubules (DMTs) from sea urchin and bovine sperm, representing external and internal fertilizers. We identify &gt;60 proteins decorating sperm DMTs; at least 15 are sperm associated and 16 are linked to infertility. By comparing DMTs across species and cell types, we define core microtubule inner proteins (MIPs) and analyze evolution of the tektin bundle. We identify conserved axonemal microtubule-associated proteins (MAPs) with unique tubulin-binding modes. Additionally, we identify a testis-specific serine/threonine kinase that links DMTs to outer dense fibers in mammalian sperm. Our study provides structural foundations for understanding sperm evolution, motility, and dysfunction at a molecular level.

Structural specializations of the sperm tail.,Leung MR, Zeng J, Wang X, Roelofs MC, Huang W, Zenezini Chiozzi R, Hevler JF, Heck AJR, Dutcher SK, Brown A, Zhang R, Zeev-Ben-Mordehai T Cell. 2023 Jun 22;186(13):2880-2896.e17. doi: 10.1016/j.cell.2023.05.026. Epub , 2023 Jun 15. PMID:37327785<ref>PMID:37327785</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 8snb" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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[[Category: Large Structures]]
[[Category: Strongylocentrotus purpuratus]]
[[Category: Zeng J]]
[[Category: Zhang R]]