Substrate selection by the proteasome during degradation of protein complexes.
Substrate selection by the proteasome during degradation of protein complexes.
复制标题
蛋白质复合物降解过程中蛋白酶体的底物选择。
DOI:
10.1038/nchembio.130
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发表时间:
2009-01
影响因子:
14.8
通讯作者:
Matouschek, Andreas
中科院分区:
文献类型:
--
作者:
Prakash, Sumit;Inobe, Tomonao;Hatch, Ace Joseph;Matouschek, Andreas
The proteasome controls the turnover of most cellular proteins. Two structural features are typically required for proteins to be degraded: covalently attached ubiquitin polypeptides that allow binding to the proteasome, and an unstructured region in the targeted protein that initiates proteolysis. Here, we have tested the degradation of model proteins to further explore how the proteasome selects its substrates. Using purified yeast proteasome and mammalian proteasome in cell lysate, we have demonstrated that the two structural features can act in trans when separated onto different proteins in a multi-subunit complex. In such complexes, the location of the unstructured initiation site and its chemical properties determine which subunit is degraded. Thus, our findings reveal the molecular basis of subunit specificity in the degradation of protein complexes. In addition, our data provide a plausible explanation for how adaptor proteins can bind to otherwise stable proteins and target them for degradation.
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影响因子:
64.5
作者:
HOCHSTRASSER, M;VARSHAVSKY, A
通讯作者:
VARSHAVSKY, A
影响因子:
2.9
作者:
Beal, RE;Toscano-Cantaffa, D;Pickart, CM
通讯作者:
Pickart, CM
影响因子:
2.9
作者:
Bienkiewicz, EA;Adkins, JN;Lumb, KJ
通讯作者:
Lumb, KJ
影响因子:
64.8
作者:
JOHNSON, ES;GONDA, DK;VARSHAVSKY, A
通讯作者:
VARSHAVSKY, A
影响因子:
11.4
作者:
Klotzbucher, A;Stewart, E;Hunt, T
通讯作者:
Hunt, T