Conformational plasticity of the ClpAP AAA+ protease couples protein unfolding and proteolysis.
Conformational plasticity of the ClpAP AAA+ protease couples protein unfolding and proteolysis.
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ClpAP AAA+ 蛋白酶的构象可塑性与蛋白质解折叠和蛋白水解相结合。
DOI:
10.1038/s41594-020-0409-5
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发表时间:
2020-05
影响因子:
16.8
通讯作者:
Southworth DR
中科院分区:
文献类型:
--
作者:
Lopez KE;Rizo AN;Tse E;Lin J;Scull NW;Thwin AC;Lucius AL;Shorter J;Southworth DR
The ClpAP complex is a conserved bacterial protease that unfolds and degrades proteins targeted for destruction. Two ClpA AAA+ hexamer rings power substrate unfolding and translocation into the ClpP proteolytic chamber. Here, we determined high-resolution structures of wild-type Escherichia coli ClpAP undergoing active unfolding and proteolysis. A spiral of pore loop-substrate contacts spans both ClpA AAA+ domains. Protomers at the spiral seam undergo nucleotide-specific rearrangements supporting substrate translocation. IGL loops extend flexibly to bind the planar, heptameric ClpP surface with the empty, symmetry-mismatched IGL pocket maintained at the seam. Three different structures identify a binding-pocket switch by the IGL loop of the lowest-positioned protomer, involving release and re-engagement with the clockwise pocket. This switch is coupled to a ClpA rotation and a network of conformational changes across the seam, suggesting that ClpA can rotate around the ClpP apical surface during processive steps of translocation and proteolysis.
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影响因子:
48
作者:
Frenz B;Walls AC;Egelman EH;Veesler D;DiMaio F
通讯作者:
DiMaio F
影响因子:
64.8
作者:
Ho CM;Beck JR;Lai M;Cui Y;Goldberg DE;Egea PF;Zhou ZH
通讯作者:
Zhou ZH
影响因子:
4.8
作者:
Effantin, Gregory;Maurizi, Michael R.;Steven, Alasdair C.
通讯作者:
Steven, Alasdair C.
影响因子:
13.6
作者:
Deville C;Carroni M;Franke KB;Topf M;Bukau B;Mogk A;Saibil HR
通讯作者:
Saibil HR
DOI:
10.1016/j.bbamcr.2011.06.007
发表时间:
2012-01
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Baker TA;Sauer RT
通讯作者:
Sauer RT