Vps24(Chmp3);

Charged multivesicular body protein 3;

Vacuolar protein sorting-associated protein 24(rVps24p);Chromatin-modifying protein 3;

Rat (Rattus norvegicus). 

Probable core component of the endosomal sorting required for transport complex III (ESCRT-III). ESCRT-III components are thought to multimerize to form a flat lattice on the perimeter membrane of the endosome. Several assembly forms of ESCRT-III may exist that interact and act sequentally. Forms a metastable monomer in solution; its core structure (without part of the putative autoinhibitory C-terminal acidic region) oligomerizes into a flat lattice via two different dimerization interfaces. In vitro, heteromerizes with CHMP2A (but not CHMP4) to form helical tubular structures that expose membrane-interacting sites on the outside whereas VPS4B can associate on the inside of the tubule. May interact with IGFBP7; the relevance of such interaction however remains unclear. Interacts with CHMP2A. Interacts with CHMP4A; the interaction requires the release of CHMP4A autoinhibition. Interacts with VPS4A. Interacts with STAMBP; the interaction appears to relieve the autoinhibition of CHMP3.

Probable core component of the endosomal sorting required for transport complex III (ESCRT-III) which is involved in multivesicular bodies (MVBs) formation and sorting of endosomal cargo proteins into MVBs. 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. The MVB pathway appears to require the sequential function of ESCRT-O, -I,-II and -III complexes. ESCRT-III proteins mostly dissociate from the invaginating membrane before the ILV is released. The ESCRT machinery also functions in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis. ESCRT-III proteins are believed to mediate the necessary vesicle extrusion and/or membrane fission activities, possibly in conjunction with the AAA ATPase VPS4. Selectively binds to phosphatidylinositol 3,5-bisphosphate PtdIns(3,5)P2 and PtdIns(3,4)P2 in preference to other phosphoinositides tested. Involved in late stages of cytokinesis (By similarity). Required for sorting/trafficking of EGF receptor.

Cytoplasm cytosol Membrane Lipid-anchor Endosome Late endosome membrane Localizes to the midbody of dividing cells.

223

N/A

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Rn.162751

rno:282834

Q8CGS4

Q8CGS4

10116.ENSRNOP00000010253

PF03357