A crescent-shaped ALIX dimer targets ESCRT-III CHMP4 filaments.
A crescent-shaped ALIX dimer targets ESCRT-III CHMP4 filaments.
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DOI:
10.1016/j.str.2009.04.007
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发表时间:
2009-06-10
期刊:
影响因子:
--
通讯作者:
Weissenhorn W
中科院分区:
文献类型:
--
作者:
Pires R;Hartlieb B;Signor L;Schoehn G;Lata S;Roessle M;Moriscot C;Popov S;Hinz A;Jamin M;Boyer V;Sadoul R;Forest E;Svergun DI;Göttlinger HG;Weissenhorn W
ALIX recruits ESCRT-III CHMP4 and is involved in membrane remodeling during endosomal receptor sorting, budding of some enveloped viruses and cytokinesis. We show that ALIX dimerizes via the middle domain (ALIX-V) in solution. Structural modeling based on small angle X-ray scattering (SAXS) data reveal an elongated crescent shaped conformation for dimeric ALIX lacking the proline rich domain (ALIXBRO1-V). Mutations at the dimerization interface prevent dimerization and induce an open elongated monomeric conformation of ALIX-V as determined by SAXS modeling. ALIX dimerizes in vivo and dimeric ALIX co-localizes with CHMP4B upon co-expression. We show further that ALIX dimerization affects HIV-1 budding. C-terminally truncated activated CHMP4B retaining the ALIX binding site forms linear, circular and helical filaments in vitro, which can be bridged by ALIX. Our data suggest that dimeric ALIX represents the active form that interacts with ESCRT-III CHMP4 polymers and functions as a scaffolding protein during membrane remodeling processes.
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DOI:
10.1126/science.1161070
发表时间:
2008-09-05
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Lata S;Schoehn G;Jain A;Pires R;Piehler J;Gottlinger HG;Weissenhorn W
通讯作者:
Weissenhorn W
影响因子:
56.9
作者:
Carlton, Jez G.;Martin-Serrano, Juan
通讯作者:
Martin-Serrano, Juan
影响因子:
4.8
作者:
Lin, Y;Kimpler, LA;Hanson, PI
通讯作者:
Hanson, PI
影响因子:
4.8
作者:
Katoh, K;Shibata, H;Maki, M
通讯作者:
Maki, M
影响因子:
5.3
作者:
Mahul-Mellier, AL;Hemming, FJ;Sadoul, R
通讯作者:
Sadoul, R