Hybrid molecular structure of the giant protease tripeptidyl peptidase II.
Hybrid molecular structure of the giant protease tripeptidyl peptidase II.
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DOI:
10.1038/nsmb.1870
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发表时间:
2010-08
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
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Tripeptidyl peptidase II (TPP II) is the largest known eukaryotic protease (6MDa). It is believed to act downstream of the 26S proteasome cleaving tripeptides from the N– termini of longer peptides and it is implicated in numerous cellular processes. Here we report the structure of Drosophila TPP II determined by a hybrid approach: The structure of the dimer was solved by x–ray crystallography and docked into the three– dimensional map of the holocomplex obtained by single-particle cryo-electron microscopy. The resulting structure reveals the compartmentalization of the active sites inside a system of chambers and suggests the existence of a molecular ruler determining the size of the cleavage products. Furthermore, the structure suggests a model for activation of TPP II involving the relocation of a flexible loop and a repositioning of the active–site serine, coupling it to holocomplex assembly and active site sequestration.
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影响因子:
2.9
作者:
CARTER, P;WELLS, JA
通讯作者:
WELLS, JA
影响因子:
64.8
作者:
Rose, C;Vargas, F;Schwartz, JC
通讯作者:
Schwartz, JC
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
32.4
作者:
Reits, E;Neijssen, J;Neefjes, J
通讯作者:
Neefjes, J
影响因子:
56.9
作者:
LOWE, J;STOCK, D;HUBER, R
通讯作者:
HUBER, R