Localization of a 25 kDa human sperm surface protein: its role in in-vitro human sperm capacitation.
A human endometrial sialic acid-binding glycoprotein (SABP) binds specifically to a 25 kDa protein on the plasma membranes of human non-capacitated sperm heads. In-vitro labelling of the sperm surface sialoglycoconjugates and subsequent incubation with SABP, suggests removal of some sialoglycoconjugate moieties from the sperm surface upon interaction with SABP. SABP also induces the exposure of mannose ligand receptors on the sperm surface and increases the production of superoxide anion (O2-).
Banerjee
M
M
Indian Institute of Chemical Biology, Calcutta, India.
Chowdhury
M
M
D001665:Binding Sites; D004717:Endometrium / Q000378:metabolism; D005260:Female; D006001:Glycoconjugates / Q000378:metabolism; D006023:Glycoproteins / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D037181:Lectins, C-Type; D008297:Male; D000090323:Mannose Receptor; D037241:Mannose-Binding Lectins; D008565:Membrane Proteins / Q000302:isolation & purification* / Q000502:physiology*; D008970:Molecular Weight; D019158:N-Acetylneuraminic Acid / Q000378:metabolism; D011485:Protein Binding; D011956:Receptors, Cell Surface / Q000378:metabolism; D013075:Sperm Capacitation / Q000502:physiology*; D013094:Spermatozoa / Q000737:chemistry* / Q000502:physiology*; D013481:Superoxides / Q000378:metabolism
D006001:Glycoconjugates; D006023:Glycoproteins; D037181:Lectins, C-Type; D000090323:Mannose Receptor; D037241:Mannose-Binding Lectins; D008565:Membrane Proteins; D011956:Receptors, Cell Surface; D013481:Superoxides; D019158:N-Acetylneuraminic Acid