The measurement of binding affinities by NMR chemical shift perturbation.
The measurement of binding affinities by NMR chemical shift perturbation.
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DOI:
10.1007/s10858-022-00402-3
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发表时间:
2022-08
影响因子:
2.7
通讯作者:
Williamson, Mike P.
中科院分区:
文献类型:
--
作者:
Hobbs, Billy;Drant, Jack;Williamson, Mike P.
We have carried out chemical shift perturbation titrations on three contrasting proteins. The resulting chemical shifts have been analysed to determine the best way to fit the data, and it is concluded that a simultaneous fitting of all raw shift data to a single dissociation constant is both the most accurate and the most precise method. It is shown that the optimal weighting of 15N chemical shifts to 1H chemical shifts is protein dependent, but is around the consensus value of 0.14. We show that chemical shift changes of individual residues can be fit to give residue-specific affinities. Residues with affinities significantly stronger than average are found in close contact with the ligand and are suggested to form a rigid contact surface, but only when the binding involves little conformational change. This observation may be of value in analysing binding and conformational change. The online version contains supplementary material available at 10.1007/s10858-022-00402-3.
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