title: Protein tyrosine phosphorylation in streptomycetes.
abstract: Using phosphotyrosine-specific antibodies, we demonstrate that in several Streptomyces spp. a variety of proteins are phosphorylated on tyrosine residues. Tyrosine phosphorylation was found in a number of Streptomyces species including Streptomyces lividans, Streptomyces hygroscopicus and Streptomyces lavendulae. Each species exhibited a unique pattern of protein tyrosine phosphorylation. Moreover, the patterns of tyrosine phosphorylation varied during the growth phase and were also influenced by culture conditions. We suggest that metabolic shifts during the complex growth cycle of these filamentous bacteria, and possibly secondary metabolic pathways, may be controlled by the action of protein tyrosine kinases and phosphatases, as has been demonstrated in signal transduction pathways in eukaryotic organisms.
authors.affiliation: Department of Microbiology and Immunology, University of British Columbia, University Blvd., Canada.
authors.forename: B
authors.initials: B
authors.lastname: Waters
authors.forename: D
authors.initials: D
authors.lastname: Vujaklija
authors.forename: M R
authors.initials: MR
authors.lastname: Gold
authors.forename: J
authors.initials: J
authors.lastname: Davies
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D010766:Phosphorylation; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D013045:Species Specificity; D013302:Streptomyces / Q000201:enzymology / Q000378:metabolism*; D048170:Streptomyces lividans / Q000201:enzymology / Q000378:metabolism; D014443:Tyrosine / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D014443:Tyrosine; D011505:Protein-Tyrosine Kinases