ISSN:
1573-4951
Keywords:
Prostacyclin
;
Platelet receptor
;
Active conformation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary To elucidate the conformation of receptor-associated prostacyclin (PGI2), we first performed structure-activity correlation analysis of over 200 PGI2 analogues and derived from this analysis several crucial features pertaining to structural requirements for PGI2 activity [Ah-lim Tsai and Kenneth K. Wu, Eicosanoids, 2 (1989) 131–143]. These structural features proved to be useful guidelines for selecting ‘model molecules’ for further investigations by molecular mechanics. By properly selecting four analogues with either rigid or uniquely oriented α-side chain structure for geometric fitting, we succeeded in maximally minimizing the degree of freedom of the carboxylate terminus of PGI2. We were able to define the spatial relationship among the four critical functional groups, i.e., C1-COOH, C6a-O, C11-OH and C15-OH. More information is needed, however, to define the geometry of the ω-side chain, particularly for the moiety beyond C15. Nevertheless, results from structure-activity correlation analysis and molecular modeling provide useful information regarding the conformation of receptor-associated PGI2, which assumes an ‘elongated’ conformation instead of the traditional ‘hairpin’ structure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00129752
Permalink
