Recruitment of endophilin to clathrin-coated pit necks is required for efficient vesicle uncoating after fission.
Recruitment of endophilin to clathrin-coated pit necks is required for efficient vesicle uncoating after fission.
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DOI:
10.1016/j.neuron.2011.08.029
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发表时间:
2011-11-17
期刊:
影响因子:
16.2
通讯作者:
De Camilli P
中科院分区:
文献类型:
--
作者:
Milosevic I;Giovedi S;Lou X;Raimondi A;Collesi C;Shen H;Paradise S;O'Toole E;Ferguson S;Cremona O;De Camilli P
Endophilin is a membrane binding protein with curvature-generating/sensing properties that participates in clathrin-dependent endocytosis of synaptic vesicle membranes. Endophilin also binds the GTPase dynamin and the phosphoinositide phosphatase synaptojanin, and is thought to coordinate constriction of coated pits with membrane fission (via dynamin) and subsequent uncoating (via synaptojanin). We show that although synaptojanin is recruited by endophilin at bud necks before fission, the knockout of all three mouse endophilins results in the accumulation of clathrin-coated vesicles but not of clathrin-coated pits at synapses. The absence of endophilin impairs, but does not abolish synaptic transmission and results in perinatal lethality, while partial endophilin absence causes severe neurological defects, including epilepsy, and neurodegeneration. Our data supports a model in which endophilin recruitment to coated pit necks, due to its curvature-sensing properties, primes vesicle buds for subsequent uncoating after membrane fission, without being critically required for the fission reaction itself.
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