Membrane budding and scission by the ESCRT machinery: it's all in the neck.

Membrane budding and scission by the ESCRT machinery: it's all in the neck.
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DOI:
10.1038/nrm2937
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发表时间:
2010-08
期刊:
Nature reviews. Molecular cell biology
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转运所需的内体分选复合物(ESCRT)催化细胞生物学中最不寻常的膜重塑事件之一。ESCRT-I和ESCRT-II通过稳定芽颈而不覆盖芽并且不被芽消耗来引导膜出芽远离胞质溶胶。ESCRT-III将芽颈从其胞质面切割。ESCRT-III介导的膜颈切割对于许多过程至关重要,包括多泡体的生物发生、病毒出芽、胞质分裂和可能的自噬。最近的研究诱导ESCRT-III在细胞中的过度表达和体外重建的出芽和断裂反应的超微结构,导致这些显着的膜反应的理解突破。
The endosomal sorting complexes required for transport (ESCRTs) catalyze one of the most unusual membrane remodelling events in cell biology. ESCRT-I and ESCRT-II direct membrane budding away from the cytosol by stabilizing bud necks without coating the bud and without being consumed in the buds. ESCRT-III cleaves the bud necks from their cytosolic face. ESCRT-III-mediated membrane neck cleavage is crucial for many processes, including the biogenesis of multivesicular bodies, viral budding, cytokinesis, and probably autophagy. Recent studies of ultrastructures induced by ESCRT-III overexpression in cells and the in vitro reconstitution of the budding and scission reactions have led to breakthroughs in understanding these remarkable membrane reactions.
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