2gd5
From Proteopedia
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'''Structural basis for budding by the ESCRTIII factor CHMP3''' | '''Structural basis for budding by the ESCRTIII factor CHMP3''' | ||
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[[Category: Weissenhorn, W.]] | [[Category: Weissenhorn, W.]] | ||
[[Category: Zamborlini, A.]] | [[Category: Zamborlini, A.]] | ||
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Revision as of 01:58, 4 May 2008
Structural basis for budding by the ESCRTIII factor CHMP3
Overview
The vacuolar protein sorting machinery regulates multivesicular body biogenesis and is selectively recruited by enveloped viruses to support budding. Here we report the crystal structure of the human ESCRT-III protein CHMP3 at 2.8 A resolution. The core structure of CHMP3 folds into a flat helical arrangement that assembles into a lattice, mainly via two different dimerization modes, and unilaterally exposes a highly basic surface. The C terminus, the target for Vps4-induced ESCRT disassembly, extends from the opposite side of the membrane targeting region. Mutations within the basic and dimerization regions hinder bilayer interaction in vivo and reverse the dominant-negative effect of a truncated CHMP3 fusion protein on HIV-1 budding. Thus, the final steps in the budding process may include CHMP protein polymerization and lattice formation on membranes by employing different bilayer-recognizing surfaces, a function shared by all CHMP family members.
About this Structure
2GD5 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural basis for budding by the ESCRT-III factor CHMP3., Muziol T, Pineda-Molina E, Ravelli RB, Zamborlini A, Usami Y, Gottlinger H, Weissenhorn W, Dev Cell. 2006 Jun;10(6):821-30. PMID:16740483 Page seeded by OCA on Sun May 4 04:58:13 2008
