Conformational structure of some beta 1-blockers, their partitioning in lipid and the role of parasubstituents.
Indian J Biochem Biophys
;
1995 Aug; 32(4): 207-12
Artigo
em Inglês
| IMSEAR
| ID: sea-26695
ABSTRACT
The conformational structure of beta1-blockers metoprolol, atenolol and practolol has been investigated by PCILO method. The aminoalkanol moiety adopts the same conformation in all these compounds. These beta-antagonists differ only in the conformation adopted by the substituent para to the aminoalkanol moiety. The graphical representation of the B1-antagonists for the final conformation reveals that only in the S-form, three interacting sites, namely, aromatic moiety, the beta-hydroxyl group and the -NH2(+) groups of aminoalkanol moiety are available for interactions with the receptor. The interaction of the aryloxy oxygen of the beta-antagonists with water molecule has also been taken into account. A linear relationship was obtained between log K (the partitioning of the beta-blocker in DMPC and also in octanol/water) and the potencies of these beta1-antagonists. Possibly, the role of para substituent is to act as an anchor by partitioning in the lipid bilayer so that the beta1-antagonist adopts the proper orientation for binding to the receptor.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Estrutura Molecular
/
Receptores Adrenérgicos beta 2
/
Antagonistas Adrenérgicos beta
/
Lipídeos
/
Conformação Molecular
Idioma:
Inglês
Revista:
Indian J Biochem Biophys
Ano de publicação:
1995
Tipo de documento:
Artigo
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