title: Proteomics-driven identification of SCO4677-dependent proteins in Streptomyces lividans and Streptomyces coelicolor.
abstract: AfsR2 is a global regulatory protein which stimulates antibiotic biosynthesis in both Streptomyces lividans and S. coelicolor. Previously, various afsR2-dependent genes including a putative abaA-like regulatory gene, SCO4677, were identified through comparative DNA microarray analysis. To further identify the putative SCO4677-dependent proteins, the comparative proteomics-driven approach was applied to the SCO4677-overexpressing strains of S. lividans and S. coelicolor along with the wild-type strains. The 2D gel-electrophoresis gave approximately 277 protein spots for S. lividans and 207 protein spots for S. coelicolor, showing different protein expression patterns between the SCO4677-overexpressing strains and the wild-type strains. Further MALDI-TOF analysis revealed that only 18 proteins exhibited similar expression patterns in both S. lividans and S. coelicolor, suggesting that the SCO4677 could encode an abaA-like regulator which controls a few cross-species proteins as well as many species-specific proteins in Streptomyces species.
authors.affiliation: Department of Biological Engineering, Inha University, Incheon, Korea.
authors.forename: Si-Sun
authors.initials: SS
authors.lastname: Choi
authors.forename: Seon-Hye
authors.initials: SH
authors.lastname: Kim
authors.forename: Eung-Soo
authors.initials: ES
authors.lastname: Kim
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D015180:Electrophoresis, Gel, Two-Dimensional; D015964:Gene Expression Regulation, Bacterial; D016133:Polymerase Chain Reaction; D040901:Proteomics / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D048372:Streptomyces coelicolor / Q000235:genetics* / Q000378:metabolism; D048170:Streptomyces lividans / Q000235:genetics* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial