title: Site of phosphorylation of SpoIIAA, the anti-anti-sigma factor for sporulation-specific sigma F of Bacillus subtilis.
abstract: Sigma F is regulated by an anti-sigma factor, SpoIIAB, and an anti-anti-sigma factor, SpoIIAA. SpoIIAB also functions as a phosphokinase which transfers phosphate from ATP to SpoIIAA; this phosphorylation is thought to be involved in the regulatory mechanism. By using [gamma-32P]ATP to phosphorylate SpoIIAA, cleaving the protein proteolytically, and analyzing the one resulting radiolabelled peptide by the Edman degradation procedure, we show that the site of phosphorylation in SpoIIAA is Ser-58.
authors.affiliation: Department of Biochemistry, University of Oxford, United Kingdom.
authors.forename: S M
authors.initials: SM
authors.lastname: Najafi
authors.forename: A C
authors.initials: AC
authors.lastname: Willis
authors.forename: M D
authors.initials: MD
authors.lastname: Yudkin
mesh_terms: D000595:Amino Acid Sequence; D001412:Bacillus subtilis / Q000378:metabolism*; D001426:Bacterial Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D008969:Molecular Sequence Data; D010766:Phosphorylation; D017421:Sequence Analysis; D012808:Sigma Factor; D013171:Spores, Bacterial / Q000378:metabolism*; D014157:Transcription Factors
chemical_list: D001426:Bacterial Proteins; C064971:FliA protein, Bacteria; D012808:Sigma Factor; D014157:Transcription Factors; C092468:spoIIR protein, Bacillus subtilis; C030069:spore-specific proteins, Bacillus