Identification of regulators of chaperone-mediated autophagy.
Identification of regulators of chaperone-mediated autophagy.
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DOI:
10.1016/j.molcel.2010.08.004
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发表时间:
2010-08-27
期刊:
影响因子:
16
通讯作者:
Cuervo AM
中科院分区:
文献类型:
--
作者:
Bandyopadhyay U;Sridhar S;Kaushik S;Kiffin R;Cuervo AM
Chaperone-mediated autophagy (CMA) is a selective mechanism for the degradation of cytosolic proteins in lysosomes that contributes to cellular quality control and becomes an additional source of amino acids when nutrients are scarce. A chaperone complex delivers CMA substrates to a receptor protein at the lysosomal membrane that assembles into multimeric translocation complexes. However, the mechanisms regulating this process remain, for the most part, unknown. In this work, we have identified two regulatory proteins, GFAP and EF1α, that mediate a previously unknown inhibitory effect of GTP on CMA. GFAP stabilizes the multimeric translocation complex against chaperone-mediated disassembly, whereas GTP-mediated release of EF1α from the lysosomal membrane promotes self-association of GFAP, disassembly of the CMA translocation complex and the consequent decrease in CMA. The dynamic interactions of these two proteins at the lysosomal membrane unveil now a role for GTP as negative regulator of CMA.
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影响因子:
5.3
作者:
Bandyopadhyay, Urmi;Kaushik, Susmita;Cuervo, Ana Maria
通讯作者:
Cuervo, Ana Maria
影响因子:
4.7
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通讯作者:
Garcia, Agustina
影响因子:
10.9
作者:
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通讯作者:
Cuervo, Ana Maria
影响因子:
11.4
作者:
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通讯作者:
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影响因子:
4.8
作者:
Xia, Zanxian;Webster, Ailsa;Varshavsky, Alexander
通讯作者:
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