title: A novel gene: sawD related to the differentiation of streptomyces ansochromogenes.
abstract: A 1.3 kb DNA fragment was cloned from a total DNA library of Streptomyces ansochromogenes using Southern hybridization. Nucleotide sequencing analysis indicated that the 1320 bp DNA fragment contained a complete open reading frame (ORF). In search of databases, the deduced product of ORF containing 213 amino acids is homologous to the serine protease of Caulobacter cresceatus, and a conserved serine-catalytic active site (GPSAG) exists. The gene was designated as sawD. The function of this gene was studied with the strategy of gene disruption, and the result showed that the sawD may be related to sporulation and especially to the spore septation in Streptomyces ansochromogenes. The preliminary result indicated that sawD mutant could produce abundant pigment in contrast with the wild type, it seems that sawD gene may be involved in pigment biosynthesis, and this gene is also dispensable for biosynthesis of nikkomycin in Streptomyces ansochromogenes.
authors.affiliation: Institute of Microbiology, The Chinese Academy of Sciences, Beijing.
authors.forename: L
authors.initials: L
authors.lastname: Gang
authors.forename: C
authors.initials: C
authors.lastname: Wei
authors.forename: T
authors.initials: T
authors.lastname: Yuqing
authors.forename: T
authors.initials: T
authors.lastname: Huarong
authors.forename: K F
authors.initials: KF
authors.lastname: Chater
authors.forename: M J
authors.initials: MJ
authors.lastname: Buttner
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D002454:Cell Differentiation; D003001:Cloning, Molecular; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D016296:Mutagenesis; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012697:Serine Endopeptidases; D013171:Spores, Bacterial; D013302:Streptomyces / Q000166:cytology* / Q000201:enzymology / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D012697:Serine Endopeptidases; C417065:sawD protein, Streptomyces ansochromogenes