title: A complex of rab3A, SNAP-25, VAMP/synaptobrevin-2 and syntaxins in brain presynaptic terminals.
abstract: Two monoclonal antibodies (SPM-1 and SPM-2) immunoprecipitate brain N-type calcium channels. On immunoaffinity chromatography of digitonin extracts of bovine brain membranes on SPM-1- and SPM-2-Sepharose, proteins of 36 (syntaxins A and B), 28 and 19 kDa are specifically retained by both columns. Here we show that the 19 and 28 kDa bands contain VAMP/synaptobrevin-2, and rab3A/smg25A and SNAP-25, respectively. Since SPM-1 and SPM-2 recognize only syntaxins and the 28 kDa band (rab3A/sm25A and SNAP-25), respectively, the results indicate that all these proteins form a complex. Our results suggest tight linkage between the components involved in neurotransmitter release.
authors.affiliation: Department of Neurochemistry, Niigata University, Japan.
authors.forename: H P
authors.initials: HP
authors.lastname: Horikawa
authors.forename: H
authors.initials: H
authors.lastname: Saisu
authors.forename: T
authors.initials: T
authors.lastname: Ishizuka
authors.forename: Y
authors.initials: Y
authors.lastname: Sekine
authors.forename: A
authors.initials: A
authors.lastname: Tsugita
authors.forename: S
authors.initials: S
authors.lastname: Odani
authors.forename: T
authors.initials: T
authors.lastname: Abe
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000954:Antigens, Surface / Q000032:analysis* / Q000737:chemistry; D001923:Brain Chemistry; D002417:Cattle; D004591:Electrophoresis, Polyacrylamide Gel; D019204:GTP-Binding Proteins / Q000032:analysis* / Q000737:chemistry; D008565:Membrane Proteins / Q000032:analysis* / Q000737:chemistry; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000032:analysis* / Q000737:chemistry; D050683:R-SNARE Proteins; D013569:Synapses / Q000737:chemistry*; D050825:Synaptosomal-Associated Protein 25; D050827:Syntaxin 1; D020692:rab3 GTP-Binding Proteins
chemical_list: D000954:Antigens, Surface; D008565:Membrane Proteins; D009419:Nerve Tissue Proteins; D050683:R-SNARE Proteins; D050825:Synaptosomal-Associated Protein 25; D050827:Syntaxin 1; D019204:GTP-Binding Proteins; D020692:rab3 GTP-Binding Proteins