A novel saccharide structure, Xyl 1----3 Gal 1----(SO3-)3,4 Fuc----, is present in acrosome reaction-inducing substance of the starfish, Asterias amurensis.

Abstract:

:The jelly coat of echinoderm eggs contains a glycoconjugate, acrosome reaction-inducing substance (ARIS), that is essential for triggering the acrosome reaction in homologous spermatozoa. In the starfish, Asterias amurensis, ARIS is a sulfated glycoprotein of an apparent molecular size of greater than 10(7). Since its biological activity is dependent mostly on its sugar moiety, oligosaccharides liberated by hydrolysis with 10 mM H2SO4 for 60 min at 100 degrees C from pronase digests of ARIS (P-ARIS) were chemically analyzed. The main oligosaccharide purified by high-performance anion-exchange chromatography was determined to be Xyl1----3Gal1----(SO3-)3,4Fuc by compositional analysis and FAB mass spectrometry. This structure indicates that ARIS possesses a novel saccharide chain having sulfated fucose as an internal residue.

authors

Okinaga T,Ohashi Y,Hoshi M

doi

10.1016/s0006-291x(05)80822-8

subject

Has Abstract

pub_date

1992-07-15 00:00:00

pages

405-10

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)80822-8

journal_volume

186

pub_type

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