Binding of a tritiated pepstatin analog to human renin.
J Cardiovasc Pharmacol
; 10 Suppl 7: S102-4, 1987.
Article
em En
| MEDLINE
| ID: mdl-2485039
ABSTRACT
The interaction between human renin and a potent pepstatin analog, SR 42128, has been investigated using binding studies. Binding and enzymatic assays were performed at pH 5.7 and pH 7.4. We found one specific inhibitor binding site per molecule of renin at both pH's. The dissociation constant (KD) obtained at equilibrium was 14-fold lower at pH 5.7 than at pH 7.4, showing a pH effect on binding of [3H]SR 42128. A similar decrease was measured in enzymatic studies. In nonequilibrium conditions, we demonstrated that only association kinetic constants have been affected by pH variations. Radioligands provided interesting tools to investigate enzyme-inhibitor relationships.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oligopeptídeos
/
Renina
Limite:
Humans
Idioma:
En
Ano de publicação:
1987
Tipo de documento:
Article