Biochemical and genetic evidence for participation of DevR in a phosphorelay signal transduction pathway essential for heterocyst maturation in Nostoc punctiforme ATCC 29133.
In a test of the hypothesis that DevR is a response regulator protein that functions in a phosphorelay signal transduction system involved in heterocyst development in Nostoc punctiforme ATCC 29133, purified affinity-tagged DevR was shown to be phosphorylated in vitro by the noncognate sensor kinase EnvZ. Site-directed mutagenesis was used to generate N. punctiforme mutants with single amino acid substitutions at the putative phosphorylation site of DevR. These mutants exhibited a Fox- phenotype like the original devR insertion mutant UCD 311, consistent with a phosphotransferase role for DevR.
Section of Microbiology, Division of Biological Sciences, University of California, Davis, California 95616, USA.
K D
KD
Hagen
J C
JC
Meeks
D000595:Amino Acid Sequence; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism*; D000458:Cyanobacteria / Q000235:genetics* / Q000254:growth & development*; D029968:Escherichia coli Proteins; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes; D010766:Phosphorylation; D017422:Sequence Analysis, DNA; D015398:Signal Transduction / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism*
D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; C098956:DevR protein, Nostoc; D029968:Escherichia coli Proteins; C113959:HepK protein, Anabaena; D009097:Multienzyme Complexes; D014157:Transcription Factors; C057843:envZ protein, E coli