title: Analysis of phosphorylation of tau with antibodies specific for phosphorylation sites.
abstract: Previously, we determined sites of tau protein phosphorylation by tau protein kinase (TPK) I/glycogen synthase kinase 3 beta (GSK-3 beta) and TPKII/(cyclin-dependent kinase 5 (CDK5) + p23). We prepared antibodies specific for these sites of tau phosphorylated by TPKI and TPKII, using chemically synthesized phosphopeptides as antigens. Each antibody specifically reacts with each phosphorylation site. With these antibodies, it was confirmed that TPKI and TPKII are responsible for these phosphorylation sites, as reported previously, except that Ser404 is also weakly phosphorylated by TPKI alone. It was also observed that TPKII-phosphorylation enhances TPKI-phosphorylation. These results indicate that these antibodies are useful tools for investigation of the phosphorylation of tau by TPKI and TPKII.
authors.affiliation: Mitsubishi Kasei Institute of Life Sciences, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ishiguro
authors.forename: K
authors.initials: K
authors.lastname: Sato
authors.forename: M
authors.initials: M
authors.lastname: Takamatsu
authors.forename: J
authors.initials: J
authors.lastname: Park
authors.forename: T
authors.initials: T
authors.lastname: Uchida
authors.forename: K
authors.initials: K
authors.lastname: Imahori
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000918:Antibody Specificity; D001665:Binding Sites / Q000502:physiology; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000378:metabolism; D051360:Cyclin-Dependent Kinase 5; D018844:Cyclin-Dependent Kinases; D038362:Glycogen Synthase Kinase 3; D006241:Haptens / Q000276:immunology; D006433:Hemocyanins / Q000276:immunology; D006801:Humans; D015151:Immunoblotting; D002479:Inclusion Bodies / Q000201:enzymology / Q000276:immunology; D008969:Molecular Sequence Data; D010750:Phosphoproteins / Q000276:immunology; D010766:Phosphorylation; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D011817:Rabbits; D016875:tau Proteins / Q000276:immunology / Q000378:metabolism*
chemical_list: D006241:Haptens; D010750:Phosphoproteins; D016875:tau Proteins; D006433:Hemocyanins; D051360:Cyclin-Dependent Kinase 5; D017346:Protein Serine-Threonine Kinases; D017871:Calcium-Calmodulin-Dependent Protein Kinases; C495905:CDK5 protein, human; D018844:Cyclin-Dependent Kinases; D038362:Glycogen Synthase Kinase 3; C032808:keyhole-limpet hemocyanin