Synthesis and renin inhibitory activity of angiotensinogen analogues having dehydrostatine, Leu psi [CH2S]Val, or Leu psi [CH2SO]Val at the P1-P1' cleavage site.
The synthesis and in vitro renin inhibitory potencies of angiotensinogen (ANG) analogues having amide (CONH) bond replacements at P1-P1', the Leu-Val cleavage site, corresponding to Leu psi[CH2SO]Val, and the trans olefinic analogue of statine (Sta), 4(S)-amino-6-methyl-2(E)-heptenoic acid (dehydrostatine, Dhs), are reported. These are compared to P1-P1' Leu psi[CH2NH]Val-, Sta-, or Phe-Phe-substituted analogues of the same template. The Dhs pseudodipeptide was found to be an adequate mimic of a trans CONH bond and gave a peptide, H-Pro-His-Pro-Phe-His-Dhs-Ile-His-D-Lys-OH, approximately equal in potency to a Phe-Phe-containing inhibitor, but 200-fold less potent than its Sta-substituted congener. That the enhanced potency of the Sta-containing peptide most likely depends on hydrogen bonding as well as tetrahedral geometry is indicated by the 50-100-fold lower potency of the tetrahedral Leu psi[CH2S]Val and Leu psi[CH2SO]Val analogues as compared to the Leu psi[CH2NH]Val-containing congener.
Smith
C W
CW
Biopolymer Chemistry Unit, Upjohn Company, Kalamazoo, Michigan 49001.
Saneii
H H
HH
Sawyer
T K
TK
Pals
D T
DT
Scahill
T A
TA
Kamdar
B V
BV
Lawson
J A
JA
D000596:Amino Acids / Q000138:chemical synthesis*; D000808:Angiotensinogen / Q000031:analogs & derivatives*; D055598:Chemical Phenomena; D002621:Chemistry; D004151:Dipeptides / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D006801:Humans; D013329:Structure-Activity Relationship; D000092502:Renin Inhibitors
D000596:Amino Acids; D000808:Angiotensinogen; D004151:Dipeptides; D000092502:Renin Inhibitors; C013165:statine