VCIP135, a novel essential factor for p97/p47-mediated membrane fusion, is required for Golgi and ER assembly in vivo.

VCIP135, a novel essential factor for p97/p47-mediated membrane fusion, is required for Golgi and ER assembly in vivo.
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DOI:
10.1083/jcb.200208112
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发表时间:
2002-12-09
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Kondo H
Kondo H
中科院分区:
其他
文献类型:
--
作者:
Uchiyama K;Jokitalo E;Kano F;Murata M;Zhang X;Canas B;Newman R;Rabouille C;Pappin D;Freemont P;Kondo H

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NSF和p97是转运囊泡与其靶膜的异型融合和细胞器的同型融合所需的ATP酶。NSF使用ATP水解来解离NSF/SNAP/SNARE复合物,分离v-和t-SNARE,然后将其引发用于随后的融合。相反,即使在ATP存在下,p97也不解离p97/p47/SNARE复合物。现在,我们已经确定了一种新的p97/p47介导的膜融合的必需因子,命名为VCIP 135(valosin-containing protein [VCP][p97]/p47 complex interacting protein,p135),并表明它结合p97/p47/syntaxin 5复合物,并通过p97催化ATP水解将其解离。在活细胞中,VCIP 135和p47显示在高尔基体和ER组装中起作用。
NSF and p97 are ATPases required for the heterotypic fusion of transport vesicles with their target membranes and the homotypic fusion of organelles. NSF uses ATP hydrolysis to dissociate NSF/SNAPs/SNAREs complexes, separating the v- and t-SNAREs, which are then primed for subsequent rounds of fusion. In contrast, p97 does not dissociate the p97/p47/SNARE complex even in the presence of ATP. Now we have identified a novel essential factor for p97/p47-mediated membrane fusion, named VCIP135 (valosin-containing protein [VCP][p97]/p47 complex-interacting protein, p135), and show that it binds to the p97/p47/syntaxin5 complex and dissociates it via p97 catalyzed ATP hydrolysis. In living cells, VCIP135 and p47 are shown to function in Golgi and ER assembly.
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