7z2a: Difference between revisions
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The | ==P. berghei kinesin-8B motor domain in no nucleotide state bound to tubulin dimer== | ||
<StructureSection load='7z2a' size='340' side='right'caption='[[7z2a]], [[Resolution|resolution]] 4.30Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[7z2a]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Plasmodium_berghei Plasmodium berghei] and [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Z2A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Z2A 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]] 4.3Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=G2P:PHOSPHOMETHYLPHOSPHONIC+ACID+GUANYLATE+ESTER'>G2P</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=7z2a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7z2a OCA], [https://pdbe.org/7z2a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7z2a RCSB], [https://www.ebi.ac.uk/pdbsum/7z2a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7z2a ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TBA1B_PIG TBA1B_PIG] Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Plasmodium species cause malaria and kill hundreds of thousands annually. The microtubule-based motor kinesin-8B is required for development of the flagellated Plasmodium male gamete, and its absence completely blocks parasite transmission. To understand the molecular basis of kinesin-8B's essential role, we characterised the in vitro properties of kinesin-8B motor domains from P. berghei and P. falciparum. Both motors drive ATP-dependent microtubule gliding, but also catalyse ATP-dependent microtubule depolymerisation. We determined these motors' microtubule-bound structures using cryo-electron microscopy, which showed very similar modes of microtubule interaction in which Plasmodium-distinct sequences at the microtubule-kinesin interface influence motor function. Intriguingly however, P. berghei kinesin-8B exhibits a non-canonical structural response to ATP analogue binding such that neck linker docking is not induced. Nevertheless, the neck linker region is required for motility and depolymerisation activities of these motors. These data suggest that the mechanochemistry of Plasmodium kinesin-8Bs is functionally tuned to support flagella formation. | |||
Mechanochemical tuning of a kinesin motor essential for malaria parasite transmission.,Liu T, Shilliday F, Cook AD, Zeeshan M, Brady D, Tewari R, Sutherland CJ, Roberts AJ, Moores CA Nat Commun. 2022 Nov 16;13(1):6988. doi: 10.1038/s41467-022-34710-x. PMID:36384964<ref>PMID:36384964</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 7z2a" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Tubulin 3D Structures|Tubulin 3D Structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Plasmodium berghei]] | |||
[[Category: Sus scrofa]] | |||
[[Category: Cook AD]] | |||
[[Category: Liu T]] | |||
[[Category: Moores CA]] | |||
[[Category: Shilliday F]] | |||
Latest revision as of 15:41, 17 July 2024
P. berghei kinesin-8B motor domain in no nucleotide state bound to tubulin dimerP. berghei kinesin-8B motor domain in no nucleotide state bound to tubulin dimer
Structural highlights
FunctionTBA1B_PIG Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. Publication Abstract from PubMedPlasmodium species cause malaria and kill hundreds of thousands annually. The microtubule-based motor kinesin-8B is required for development of the flagellated Plasmodium male gamete, and its absence completely blocks parasite transmission. To understand the molecular basis of kinesin-8B's essential role, we characterised the in vitro properties of kinesin-8B motor domains from P. berghei and P. falciparum. Both motors drive ATP-dependent microtubule gliding, but also catalyse ATP-dependent microtubule depolymerisation. We determined these motors' microtubule-bound structures using cryo-electron microscopy, which showed very similar modes of microtubule interaction in which Plasmodium-distinct sequences at the microtubule-kinesin interface influence motor function. Intriguingly however, P. berghei kinesin-8B exhibits a non-canonical structural response to ATP analogue binding such that neck linker docking is not induced. Nevertheless, the neck linker region is required for motility and depolymerisation activities of these motors. These data suggest that the mechanochemistry of Plasmodium kinesin-8Bs is functionally tuned to support flagella formation. Mechanochemical tuning of a kinesin motor essential for malaria parasite transmission.,Liu T, Shilliday F, Cook AD, Zeeshan M, Brady D, Tewari R, Sutherland CJ, Roberts AJ, Moores CA Nat Commun. 2022 Nov 16;13(1):6988. doi: 10.1038/s41467-022-34710-x. PMID:36384964[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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