View source for 6dlv


==Cryo-EM of the GTP-bound human dynamin-1 polymer assembled on the membrane in the super constricted state==
<SX load='6dlv' size='340' side='right' viewer='molstar' caption='[[6dlv]], [[Resolution|resolution]] 10.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6dlv]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DLV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6DLV FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6dlu|6dlu]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DNM1, DNM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Dynamin_GTPase Dynamin GTPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.5.5 3.6.5.5] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6dlv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6dlv OCA], [http://pdbe.org/6dlv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6dlv RCSB], [http://www.ebi.ac.uk/pdbsum/6dlv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6dlv ProSAT]</span></td></tr>
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== Function ==
[[http://www.uniprot.org/uniprot/DYN1_HUMAN DYN1_HUMAN]] Microtubule-associated force-producing protein involved in producing microtubule bundles and able to bind and hydrolyze GTP. Most probably involved in vesicular trafficking processes. Involved in receptor-mediated endocytosis. 
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== Publication Abstract from PubMed ==
Membrane fission is a fundamental process in the regulation and remodelling of cell membranes. Dynamin, a large GTPase, mediates membrane fission by assembling around, constricting and cleaving the necks of budding vesicles(1). Here we report a 3.75 A resolution cryo-electron microscopy structure of the membrane-associated helical polymer of human dynamin-1 in the GMPPCP-bound state. The structure defines the helical symmetry of the dynamin polymer and the positions of its oligomeric interfaces, which were validated by cell-based endocytosis assays. Compared to the lipid-free tetramer form(2), membrane-associated dynamin binds to the lipid bilayer with its pleckstrin homology domain (PHD) and self-assembles across the helical rungs via its guanine nucleotide-binding (GTPase) domain(3). Notably, interaction with the membrane and helical assembly are accommodated by a severely bent bundle signalling element (BSE), which connects the GTPase domain to the rest of the protein. The BSE conformation is asymmetric across the inter-rung GTPase interface, and is unique compared to all known nucleotide-bound states of dynamin. The structure suggests that the BSE bends as a result of forces generated from the GTPase dimer interaction that are transferred across the stalk to the PHD and lipid membrane. Mutations that disrupted the BSE kink impaired endocytosis. We also report a 10.1 A resolution cryo-electron microscopy map of a super-constricted dynamin polymer showing localized conformational changes at the BSE and GTPase domains, induced by GTP hydrolysis, that drive membrane constriction. Together, our results provide a structural basis for the mechanism of action of dynamin on the lipid membrane.

Cryo-EM of the dynamin polymer assembled on lipid membrane.,Kong L, Sochacki KA, Wang H, Fang S, Canagarajah B, Kehr AD, Rice WJ, Strub MP, Taraska JW, Hinshaw JE Nature. 2018 Aug;560(7717):258-262. doi: 10.1038/s41586-018-0378-6. Epub 2018 Aug, 1. PMID:30069048<ref>PMID:30069048</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Dynamin 3D structures|Dynamin 3D structures]]
== References ==
<references/>
__TOC__
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[[Category: Dynamin GTPase]]
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Canagarajah, B]]
[[Category: Fang, S]]
[[Category: Hinshaw, J E]]
[[Category: Kehr, A D]]
[[Category: Kong, L]]
[[Category: Rice, W J]]
[[Category: Wang, H]]
[[Category: Dynamin family]]
[[Category: Endocytosis]]
[[Category: Gtpase]]
[[Category: Hydrolase]]
[[Category: Membrane protein]]
[[Category: Pleckstrin homology domain]]