Expression of CD4-like structure on murine egg vitelline membrane and its signal transductive roles through p56lck in fertilization.
Expression of CD4-like molecule on vitelline membrane of murine eggs was demonstrated by indirect immunofluorescence (IIF) test and immunoprecipitation corresponding to the expression of major histocompatibility complex (MHC) class II molecule on murine sperm detected by immunoblotting. This molecule showed slightly larger size than that of the authentic CD4 molecule from T-cells on SDS-PAGE. This molecule was suggested to bind to MHC class II structure on sperm during fertilization because anti-CD4 monoclonal antibody (mAb) blocked in vitro fertilization (IVF). In addition, src-related tyrosine protein kinase (p56lck) was demonstrated in the inner vitelline membrane of eggs by means of IIF with anti-p56lck mAb and immune-complex kinase assay. This molecule was suggested to be associated with CD4-like molecule.
Mori
T
T
Department of Immunology, University of Tokyo, Japan.
Wu
G M
GM
Mori
E
E
D000595:Amino Acid Sequence; D000818:Animals; D015704:CD4 Antigens; D005260:Female; D000949:Histocompatibility Antigens Class II / Q000032:analysis / Q000502:physiology*; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck); D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D010063:Ovum / Q000737:chemistry* / Q000502:physiology; D011505:Protein-Tyrosine Kinases / Q000502:physiology; D011518:Proto-Oncogene Proteins / Q000502:physiology*; D015398:Signal Transduction; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000276:immunology / Q000502:physiology; D013601:T-Lymphocytes / Q000737:chemistry; D014817:Vitelline Membrane / Q000737:chemistry*
D015704:CD4 Antigens; D000949:Histocompatibility Antigens Class II; D011518:Proto-Oncogene Proteins; D011505:Protein-Tyrosine Kinases; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck)