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| | <StructureSection load='2zam' size='340' side='right'caption='[[2zam]], [[Resolution|resolution]] 3.50Å' scene=''> | | <StructureSection load='2zam' size='340' side='right'caption='[[2zam]], [[Resolution|resolution]] 3.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2zam]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ZAM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ZAM FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2zam]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ZAM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ZAM FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1xwi|1xwi]], [[2zan|2zan]], [[2zao|2zao]]</div></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.5Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Skd1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=2zam FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zam OCA], [https://pdbe.org/2zam PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2zam RCSB], [https://www.ebi.ac.uk/pdbsum/2zam PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2zam ProSAT]</span></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=2zam FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zam OCA], [https://pdbe.org/2zam PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2zam RCSB], [https://www.ebi.ac.uk/pdbsum/2zam PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2zam ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/VPS4B_MOUSE VPS4B_MOUSE]] Involved in late steps of the endosomal multivesicular bodies (MVB) pathway. Recognizes membrane-associated ESCRT-III assemblies and catalyzes their disassembly, possibly in combination with membrane fission. Redistributes the ESCRT-III components to the cytoplasm for further rounds of MVB sorting. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. In conjunction with the ESCRT machinery also appears to function in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis (By similarity).<ref>PMID:10393249</ref> <ref>PMID:10679028</ref>
| + | [https://www.uniprot.org/uniprot/VPS4B_MOUSE VPS4B_MOUSE] Involved in late steps of the endosomal multivesicular bodies (MVB) pathway. Recognizes membrane-associated ESCRT-III assemblies and catalyzes their disassembly, possibly in combination with membrane fission. Redistributes the ESCRT-III components to the cytoplasm for further rounds of MVB sorting. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. In conjunction with the ESCRT machinery also appears to function in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis (By similarity).<ref>PMID:10393249</ref> <ref>PMID:10679028</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Lk3 transgenic mice]] | + | [[Category: Mus musculus]] |
| - | [[Category: Inoue, M]] | + | [[Category: Inoue M]] |
| - | [[Category: Kamikubo, H]] | + | [[Category: Kamikubo H]] |
| - | [[Category: Kataoka, M]] | + | [[Category: Kataoka M]] |
| - | [[Category: Kato, R]] | + | [[Category: Kato R]] |
| - | [[Category: Kawasaki, M]] | + | [[Category: Kawasaki M]] |
| - | [[Category: Wakatsuki, S]] | + | [[Category: Wakatsuki S]] |
| - | [[Category: Yoshimori, T]] | + | [[Category: Yoshimori T]] |
| - | [[Category: Aaa atpase]]
| + | |
| - | [[Category: Atp-binding]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Nucleotide-binding]]
| + | |
| - | [[Category: Phosphorylation]]
| + | |
| - | [[Category: Protein transport]]
| + | |
| - | [[Category: Skd1]]
| + | |
| - | [[Category: Transport]]
| + | |
| - | [[Category: Vps4b]]
| + | |
| Structural highlights
Function
VPS4B_MOUSE Involved in late steps of the endosomal multivesicular bodies (MVB) pathway. Recognizes membrane-associated ESCRT-III assemblies and catalyzes their disassembly, possibly in combination with membrane fission. Redistributes the ESCRT-III components to the cytoplasm for further rounds of MVB sorting. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. In conjunction with the ESCRT machinery also appears to function in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis (By similarity).[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
SKD1/VPS4B belongs to the adenosine triphosphatases associated with diverse cellular activities (AAA) family and regulates multivesicular body (MVB) biogenesis. SKD1 changes its oligomeric state during the ATPase cycle and subsequently releases endosomal sorting complex required for transport (ESCRT) complexes from endosomes during the formation of MVBs. In this study, we describe domain motions in monomeric SKD1 on ATP and ADP binding. Nucleotides bind between the alpha/beta and the alpha-helical domains of SKD1, inducing a approximately 20 degrees domain rotation and closure of the binding site, which are similar to the changes observed in the AAA+ ATPase, HslU. Gel filtration and small-angle X-ray scattering experiments showed that the ATP-bound form of SKD1 oligomerizes in solution, whereas ADP-bound and apo forms of SKD1 exist as monomers, even though the conformations of the ADP- and ATP-bound forms are nearly identical. Nucleotide-bound SKD1 structures are compatible with a hexameric ring arrangement reminiscent of the AAA ATPase p97 D1 ring. In the hexameric ring model of SKD1, Arg290 from a neighboring molecule binds to the gamma-phosphate of ATP, which promotes oligomerization of the ATP-bound form. ATP hydrolysis would eliminate this interaction and subsequent nucleotide release causes the domains to rotate, which together lead to the disassembly of the SKD1 oligomer.
Nucleotide-dependent conformational changes and assembly of the AAA ATPase SKD1/VPS4B.,Inoue M, Kamikubo H, Kataoka M, Kato R, Yoshimori T, Wakatsuki S, Kawasaki M Traffic. 2008 Dec;9(12):2180-9. Epub 2008 Oct 8. PMID:18796009[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Scheuring S, Bodor O, Rohricht RA, Muller S, Beyer A, Kohrer K. Cloning, characterisation, and functional expression of the Mus musculus SKD1 gene in yeast demonstrates that the mouse SKD1 and the yeast VPS4 genes are orthologues and involved in intracellular protein trafficking. Gene. 1999 Jun 24;234(1):149-59. PMID:10393249
- ↑ Yoshimori T, Yamagata F, Yamamoto A, Mizushima N, Kabeya Y, Nara A, Miwako I, Ohashi M, Ohsumi M, Ohsumi Y. The mouse SKD1, a homologue of yeast Vps4p, is required for normal endosomal trafficking and morphology in mammalian cells. Mol Biol Cell. 2000 Feb;11(2):747-63. PMID:10679028
- ↑ Inoue M, Kamikubo H, Kataoka M, Kato R, Yoshimori T, Wakatsuki S, Kawasaki M. Nucleotide-dependent conformational changes and assembly of the AAA ATPase SKD1/VPS4B. Traffic. 2008 Dec;9(12):2180-9. Epub 2008 Oct 8. PMID:18796009 doi:10.1111/j.1600-0854.2008.00831.x
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