Sulfated β-galactan from sea urchin 1 A UNIQUE 2-SULFATED Β-GALACTAN FROM THE EGG JELLY OF THE SEA URCHIN GLYPTOCIDARIS CRENULARIS: CONFORMATION FLEXIBILITY VERSUS INDUCTION OF THE SPERM ACROSOME REACTION
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1 A UNIQUE 2-SULFATED Β-GALACTAN FROM THE EGG JELLY OF THE SEA URCHIN GLYPTOCIDARIS CRENULARIS: CONFORMATION FLEXIBILITY VERSUS INDUCTION OF THE SPERM ACROSOME REACTION Michelle O. Castro, Vitor H. Pomin Livia L. Santos, Ana-Cristina E.S. Vilela-Silva, Noritaka Hirohashi, Laércio Pol-Fachin ,Hugo Verli, and Paulo A.S. Mourão From the Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho, Instituto de Bioquímica Médica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Caixa Postal 68041, Rio de Janeiro, RJ, 21941–590, Brazil, the Genetic Counseling Course, Graduate School of Humanities and Sciences, Ochanamizu University, Japan, the Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, and Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Caixa Postal 15005, Porto Alegre 91500-970, RS, Brazil. Running head: Sulfated β-galactan from sea urchin Address correspondence to: Paulo A.S. Mourão, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Caixa Postal 68041, Rio de Janeiro, RJ, 21941–590, BrazilPhone:+5521-25622093; email:[email protected]
منابع مشابه
A unique 2-sulfated {beta}-galactan from the egg jelly of the sea urchin Glyptocidaris crenularis: conformation flexibility versus induction of the sperm acrosome reaction.
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In the present review, we describe a systematic study of the sulfated polysaccharides from marine invertebrates, which led to the discovery of a carbohydrate-based mechanism of sperm-egg recognition during sea urchin fertilization. We have described unique polymers present in these organisms, especially sulfated fucose-rich compounds found in the egg jelly coat of sea urchins. The polysaccharid...
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Spawning marine invertebrates are excellent models for studying fertilization and reproductive isolating mechanisms. To identify variation in the major steps in sea urchin gamete recognition, we studied sperm activation in three closely related sympatric Strongylocentrotus species. Sperm undergo acrosomal exocytosis upon contact with sulfated polysaccharides in the egg-jelly coat. This acrosome...
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تاریخ انتشار 2009