Abstract:
:An inhibitor against the egg beta-D-N-acetylglucosaminidase (GlcNAcase) was purified from the vitelline coat of eggs of the ascidian, Halocynthia roretzi. The purified inhibitor gave a single band with an apparent molecular mass of 70 kDa on SDS-PAGE under non-reducing conditions. The GlcNAcase inhibitor potently inhibited the ascidian egg GlcNAcase activity, and also substantially inhibited the GlcNAcase activity in the ascidian sperm extract, although to lesser extent. In contrast, it showed little inhibitory effect on the activity of GlcNAcase from Jack beans. This inhibitor was found to block the binding of sperm to the vitelline coat of the eggs in a concentration-dependent manner. These results strongly suggest that the GlcNAcase inhibitor isolated from the vitelline coat functions in the binding of sperm to the egg coat, as a possible sperm receptor.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Matsuura K,Sawada H,Yokosawa Hdoi
10.1006/bbrc.1995.2131subject
Has Abstractpub_date
1995-08-04 00:00:00pages
311-6issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(85)72131-6journal_volume
213pub_type
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