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Synergistic actions of disulfide-reducing agents on 1-methyladenine-induced oocyte maturation in starfish

Authors
Journal
Developmental Biology
0012-1606
Publisher
Elsevier
Publication Date
Volume
128
Issue
1
Identifiers
DOI: 10.1016/0012-1606(88)90285-0

Abstract

Abstract Several disulfide-reducing agents, such as dithiothreitol, 2,3-dimercapto-1-propanol, cysteine ethyl ester, and cysteine methyl ester enhanced the effectiveness of 1-methyladenine (1-MeAde) to induce oocyte maturation in the starfish Asterina pectinifera. This enhancement occurred at relatively low concentrations at which these agents by themselves were ineffective in inducing oocyte maturation. The agents caused a marked (about twofold) increase in specific [1- 3H]MeAde binding. The binding increased directly in relation to the potency of the agents in enhancing 1-MeAde action. Scatchard analysis indicated that dithiothreitol increased the B max without affecting the affinity of 1-MeAde binding. These results strongly suggest that disulfide-reducing agents enhance the maturational action of 1-MeAde by increasing the number of 1-MeAde binding sites in oocyte cortices.

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