Conformational plasticity of the ClpAP AAA+ protease couples protein unfolding and proteolysis.

Conformational plasticity of the ClpAP AAA+ protease couples protein unfolding and proteolysis.
复制标题

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
复制
发表时间:
2020-05
影响因子:
16.8
通讯作者:
Southworth DR
Southworth DR
中科院分区:
生物学1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

文献摘要

参考文献

被引文献

相似文献

ClpAP复合体是一种保守的细菌蛋白酶,它能解开并降解目标为破坏的蛋白质。两个ClpA AAA+六聚体环为底物的展开和移位提供动力,使其进入ClpP蛋白水解室。在这里,我们确定了经历活性去折叠和蛋白降解的野生型大肠杆菌ClpAP的高分辨结构。两个ClpA AAA+结构域上都有螺旋状的孔环-底物接触。螺旋缝合处的原核糖体经历了支持底物转位的核苷酸特异性重排。IGL环可以灵活地延伸,将平面七聚体ClpP表面与空的、对称不匹配的IGL口袋结合在接缝处。三种不同的结构通过最低位置的原型的IGL环识别绑定口袋开关,涉及释放和重新接合顺时针口袋。这种开关与ClpA旋转和跨缝的构象变化网络相耦合,这表明ClpA可以在易位和蛋白降解的过程中围绕ClpP顶面旋转。
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.
DOI: 10.1038/nmeth.4340
发表时间: 2017-08
期刊: Nature methods
影响因子: 48
作者:
Frenz B;Walls AC;Egelman EH;Veesler D;DiMaio F
通讯作者: DiMaio F
DOI: 10.1038/s41586-018-0469-4
发表时间: 2018-09
期刊: Nature
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
DOI: 10.1074/jbc.m109.090498
发表时间: 2010-05-07
影响因子: 4.8
作者:
Effantin, Gregory;Maurizi, Michael R.;Steven, Alasdair C.
通讯作者: Steven, Alasdair C.
DOI: 10.1126/sciadv.1701726
发表时间: 2017-08
期刊: Science advances
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