Renin inhibitors. Dipeptide analogs of angiotensinogen utilizing a structurally modified phenylalanine residue to impart proteolytic stability
作者:Jacob J. Plattner、Patrick A. Marcotte、Hollis D. Kleinert、Herman H. Stein、Jonathan Greer、Giorgio Bolis、Anthony K. L. Fung、Barbara A. Bopp、Jay R. Luly
DOI:10.1021/jm00120a006
日期:1988.12
A series of renin inhibitors have been prepared and evaluated for their susceptibility to cleavage by the serine protease chymotrypsin. The compounds were designed by consideration of the structural requirements in the active-site region of renin and chymotrypsin. By systematic alteration of the P3 phenylalanine residue, compounds with varying degrees of renin inhibitory potency and chymotrypsin susceptibility were obtained. Selected analogues from this group were examined in vivo for both their hypotensive effects and metabolic patterns.
The effects of N-methylation on the enantioselectivity of catalysis by cyclo[(R)-His-(R)-Phe]
作者:Jason C. Thoen、Mark A. Lipton
DOI:10.1016/s0957-4166(97)00573-9
日期:1997.12
The cyclic dipeptide cyclo[(R)-His-(R)-Phe] 1 has been known since 1981 to catalyze the enantioselective formation of cyanohydrins from aldehydes and HCN. Although 1 has proved to be very effective in the production of optically active cyanohydrins, the precise structure of its catalytically active form remains unresolved. Two derivatives, in which the two amides in 1 were independently N-methylated, were synthesized as probes of the structural and functional requirements for catalysis by 1. Both derivatives were far more soluble in organic solvents and were found to catalyze the formation of racemic cyanohydrin, but differed greatly in their turnover rates. Mixtures of the two derivatives with each other and with 1 were also examined as hydrocyanation catalysts. Only the mixtures containing 1 demonstrated any enantioselectivity, but did not appear any more competent as catalysts than reduced quantities of 1. From these data, it is concluded that both amide bonds are essential for effective catalysis by 1, but that the amide containing the His N-alpha appears to be involved in interactions with the substrate while the other amide plays a structural role, possibly for self-associative hydrogen bonding. (C) 1997 Published by Elsevier Science Ltd. All rights reserved.
Design and synthesis of a potent and specific renin inhibitor with a prolonged duration of action in vivo
作者:Suvit Thaisrivongs、Donald T. Pals、Douglas W. Harris、Warren M. Kati、Steve R. Turner
DOI:10.1021/jm00160a049
日期:1986.10
A structure-activity analysis of peptidescontaining backbone C alpha-methyl and N alpha-methyl modifications led to the discovery of potentrenininhibitors with high metabolic stability. In vitro, Boc-Pro-Phe-N alpha-MeHis-Leu psi-[CHOHCH2]Val-Ile-Amp (XII) is a potentinhibitor of human plasma renin with IC50 of 0.26 nM. It is a much weaker inhibitor of other aspartic proteases such as porcine pepsin