A crescent-shaped ALIX dimer targets ESCRT-III CHMP4 filaments.

A crescent-shaped ALIX dimer targets ESCRT-III CHMP4 filaments.
复制标题

DOI:
10.1016/j.str.2009.04.007
复制
发表时间:
2009-06-10
期刊:
Structure (London, England : 1993)
影响因子:
--
通讯作者:
Weissenhorn W
Weissenhorn W
中科院分区:
其他
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

文献摘要

参考文献

被引文献

相似文献

阿利克斯募集ESCRT-III CHMP 4,并参与内体受体分选、一些包膜病毒的出芽和胞质分裂期间的膜重塑。我们表明,阿利克斯二聚化通过中间域(ALIX-V)在解决方案中。基于小角X射线散射(SAXS)数据的结构建模揭示了缺乏富含脯氨酸的结构域(ALIXBRO 1-V)的二聚体阿利克斯的细长新月形构象。二聚化界面处的突变阻止二聚化并诱导ALIX-V的开放伸长单体构象,如通过SAXS建模所确定的。阿利克斯在体内二聚化,并且二聚阿利克斯在共表达时与CHMP 4 B共定位。我们进一步表明,阿利克斯二聚化影响HIV-1出芽。保留阿利克斯结合位点的C-末端截短的活化CHMP 4 B在体外形成线性、环形和螺旋形细丝,其可以通过阿利克斯桥接。我们的数据表明,二聚体阿利克斯代表与ESCRT-III CHMP 4聚合物相互作用的活性形式,并在膜重塑过程中作为支架蛋白发挥作用。
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.
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
DOI: 10.1126/science.1143422
发表时间: 2007-06-29
期刊: SCIENCE
影响因子: 56.9
作者:
Carlton, Jez G.;Martin-Serrano, Juan
通讯作者: Martin-Serrano, Juan
DOI: 10.1074/jbc.m413968200
发表时间: 2005-04-01
影响因子: 4.8
作者:
Lin, Y;Kimpler, LA;Hanson, PI
通讯作者: Hanson, PI
DOI: 10.1074/jbc.m301604200
发表时间: 2003-10-03
影响因子: 4.8
作者:
Katoh, K;Shibata, H;Maki, M
通讯作者: Maki, M
DOI: 10.1523/jneurosci.3069-05.2006
发表时间: 2006-01-11
影响因子: 5.3
作者:
Mahul-Mellier, AL;Hemming, FJ;Sadoul, R
通讯作者: Sadoul, R