Structural basis of a rationally rewired protein-protein interface critical to bacterial signaling.
Structural basis of a rationally rewired protein-protein interface critical to bacterial signaling.
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DOI:
10.1016/j.str.2013.07.005
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发表时间:
2013-09-03
期刊:
影响因子:
5.7
通讯作者:
Laub, Michael T.
中科院分区:
文献类型:
--
作者:
Podgornaia, Anna I.;Casino, Patricia;Marina, Alberto;Laub, Michael T.
Two-component signal transduction systems typically involve a sensor histidine kinase that specifically phosphorylates a single, cognate response regulator. This protein-protein interaction relies on molecular recognition via a small set of residues in each protein. To better understand how these residues determine the specificity of kinase-substrate interactions, we rationally rewired the interaction interface of a Thermotoga maritima two-component system, HK853-RR468, to match that found in a different two-component system, E. coli PhoR-PhoB. The rewired proteins interacted robustly with each other, but no longer interacted with the parent proteins. Analysis of the crystal structures of the wild-type and mutant protein complexes, along with a systematic mutagenesis study, reveals how individual mutations contribute to the rewiring of interaction specificity. Our approach and conclusions have implications for studies of other protein-protein interactions, protein evolution, and the design of novel protein interfaces.
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