Acyldepsipeptide antibiotics induce the formation of a structured axial channel in ClpP: A model for the ClpX/ClpA-bound state of ClpP.

Acyldepsipeptide antibiotics induce the formation of a structured axial channel in ClpP: A model for the ClpX/ClpA-bound state of ClpP.
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DOI:
10.1016/j.chembiol.2010.07.008
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发表时间:
2010-09-24
影响因子:
--
通讯作者:
Ortega J
Ortega J
中科院分区:
生物1区
文献类型:
--
作者:
Li DH;Chung YS;Gloyd M;Joseph E;Ghirlando R;Wright GD;Cheng YQ;Maurizi MR;Guarné A;Ortega J

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在ClpXP和ClpAP复合物中,ClpA和ClpX使用ATP水解的能量来解折叠蛋白质并将它们移位到自区室化的ClpP蛋白酶中。ClpP需要ATP酶降解折叠或未折叠的底物,但酰基缩酚肽抗生素(ADEP)与ClpP的结合绕过了未折叠蛋白的这一要求。我们目前的晶体结构大肠杆菌ClpP绑定ADEP 1和报告的ClpP激活的结构变化。ADEP 1结合在作为ClpP ATP酶主要对接位点的疏水沟中。ADEP 1的结合将ClpP的N-末端环锁定在β-发夹构象中,产生一个稳定的孔,延伸的多肽可以穿过该孔。这种结构作为ClpP在全酶ClpAP和ClpXP复合物中的模型,并为进一步开发这类抗生素提供了关键信息。
In ClpXP and ClpAP complexes, ClpA and ClpX use the energy of ATP hydrolysis to unfold proteins and translocate them into the self-compartmentalized ClpP protease. ClpP requires the ATPases to degrade folded or unfolded substrates, but binding of acyldepsipeptide antibiotics (ADEPs) to ClpP bypasses this requirement with unfolded proteins. We present the crystal structure of Escherichia coli ClpP bound to ADEP1 and report the structural changes underlying ClpP activation. ADEP1 binds in the hydrophobic groove that serves as the primary docking site for ClpP ATPases. Binding of ADEP1 locks the N-terminal loops of ClpP in a β-hairpin conformation, generating a stable pore through which extended polypeptides can be threaded. This structure serves as a model for ClpP in the holo-enzyme ClpAP and ClpXP complexes and provides critical information to further develop this class of antibiotics.
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