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Sperm and Egg Jelly Coat from Sea Urchin Lytechinus variegatus Collected in Rio de Janeiro Contain Distinct Sialic Acid-Rich Polysaccharides BABT
Valle,Gabrielle M.; Cinelli,Leonardo P.; Todeschini,Adriane R.; Brito-Gitirana,Lycia de; Vilela-Silva,Ana-Cristina E.S.; Mourão,Paulo A.S..
This work found the occurrence of a distinct sialic acid-rich polysaccharide in the sperm surface of the sea urchin Lytechinus variegatus, which differed significantly from a similar molecule found in the egg jelly. The sperm polysaccharide extracted by protease digestion was purified using anion exchange chromatography and characterized using agarose gel electrophoresis, gas chromatography/mass spectrometry and NMR spectroscopy. This polysaccharide was highly sulfated and composed almost exclusively of N-acetylneuraminic acid. In contrast, the sialic acid-rich polysaccharide from the egg jelly was composed of N-glycolylneuraminic acid and contains several other hexoses in its structure. This new molecule could help to characterize in further detail the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sea urchin; Sperm; Egg jelly coat; Fertilization; Sialic acid; Sulfated polysaccharide.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000400617
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