The role of the imidazolyl nitrogen atoms of histidine-12 in ribonuclease S.
作者信息
van Batenburg O D, Voskuyl-Holtkamp I, Schattenkerk C, Hoes K, Kerling K E, Havinga E
出版信息
Biochem J. 1977 May 1;163(2):385-7. doi: 10.1042/bj1630385.
Abstract
S-peptide (residues 1--14) analogues in which the active histidine-12 residue is replaced by Npi-methyl-L-histidine, Ntau-methyl-L-histidine and beta-(pyrid-3-yl)-L-alanine were synthesized and tested for their capacity to bind to S-protein and to activate it. The results show that both imidazolyl nitrogen atoms are required for optimal catalytic functioning, Ntau being essential to the catalytic reaction itself, Npi playing a role in keeping the imidazole ring in the correct position.
摘要
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