Membrane fusion.

Membrane fusion.
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DOI:
10.1038/nsmb.1451
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发表时间:
2008-07
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
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--
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亚细胞区室化、细胞生长、激素分泌和神经传递需要快速、有针对性和受调控的膜融合。融合需要通过两个并置(对接)的膜囊泡进行广泛的脂质重排,连接它们的膜蛋白和脂质,并在不裂解的情况下混合它们的腔内容物。分泌途径中的膜融合涉及Rab GTP酶;它们结合的“效应”蛋白,其介导下游步骤; SNARE蛋白,其可以顺式(结合到一个膜)或反式(锚定到并置的膜)彼此“诱捕”;以及SNARE相关蛋白(SM蛋白; NSF或Sec 18 p; SNAP或Sec 17 p;以及其他)与特定脂质合作以催化融合。相比之下,线粒体和细胞-细胞融合事件由不同的催化剂调节并使用不同的催化剂。
Subcellular compartmentalization, cell growth, hormone secretion and neurotransmission require rapid, targeted, and regulated membrane fusion. Fusion entails extensive lipid rearrangements by two apposed (docked) membrane vesicles, joining their membrane proteins and lipids and mixing their luminal contents without lysis. Fusion of membranes in the secretory pathway involves Rab GTPases; their bound ‘effector’ proteins, which mediate downstream steps; SNARE proteins, which can ‘snare’ each other, in cis (bound to one membrane) or in trans (anchored to apposed membranes); and SNARE-associated proteins (SM proteins; NSF or Sec18p; SNAP or Sec17p; and others) cooperating with specific lipids to catalyze fusion. In contrast, mitochondrial and cell-cell fusion events are regulated by and use distinct catalysts.
DOI: 10.1021/bi00125a004
发表时间: 1992-03-17
期刊: BIOCHEMISTRY
影响因子: 2.9
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