Structure Determination of Protein-Protein Complexes Using NMR Chemical Shifts: Case of an Endonuclease Colicin-Immunity Protein Complex

被引:45
|
作者
Montalvao, Rinaldo W. [1 ,2 ]
Cavalli, Andrea [1 ]
Salvatella, Xavier [1 ]
Blundell, Tom L. [2 ]
Vendruscolo, Michele [1 ]
机构
[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
[2] Univ Cambridge, Dept Biochem, Cambridge CB2 1GA, England
关键词
D O I
10.1021/ja805258z
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nuclear magnetic resonance (NMR) spectroscopy provides a range of powerful techniques for determining the structures and the dynamics of proteins. The high-resolution determination of the structures of protein-protein complexes, however, is still a challenging problem for this approach, since it can normally provide only a limited amount of structural information at protein-protein interfaces. We present here the determination using NMR chemical shifts of the structure (PDB code 2K5X) of the cytotoxic endonuclease domain from bacterial toxin colicin (E9) in complex with its cognate immunity protein (Im9). In order to achieve this result, we introduce the CamDock method, which combines a flexible docking procedure with a refinement that exploits the structural information provided by chemical shifts. The results that we report thus indicate that chemical shifts can be used as structural restraints for the determination of the conformations of protein complexes that are difficult to obtain by more standard NMR approaches.
引用
收藏
页码:15990 / 15996
页数:7
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