title: Identification and characterization of pltZ, a gene involved in the repression of pyoluteorin biosynthesis in Pseudomonas sp. M18.
abstract: A new regulator gene named pltZ, which is located downstream of the plt gene cluster in the genome of Pseudomonas sp. M18, was identified, sequenced and characterized in this report. The deduced amino acid sequence of PltZ shares significant homology with other bacterial regulators in the TetR family. The chromosomal pltZ disruption mutant gave rise to 4.4-fold enhancement of pyoluteorin biosynthesis but did not exert significant influence on the accumulation of phenazine-1-carboxylic acid compared with the wild-type M18. The negative regulation of pltZ on pyoluteorin biosynthesis was further confirmed by multiplied pltZ gene dosage experiments and pltA'-'lacZ translational fusion analyses.
authors.affiliation: School of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai 200240, PR China.
authors.forename: Xianqing
authors.initials: X
authors.lastname: Huang
authors.forename: Donghua
authors.initials: D
authors.lastname: Zhu
authors.forename: Yihe
authors.initials: Y
authors.lastname: Ge
authors.forename: Hongbo
authors.initials: H
authors.lastname: Hu
authors.forename: Xuehong
authors.initials: X
authors.lastname: Zhang
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Xu
mesh_terms: D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D015964:Gene Expression Regulation, Bacterial; D015723:Gene Library; D005798:Genes, Bacterial / Q000235:genetics*; D005809:Genes, Regulator / Q000235:genetics; D008969:Molecular Sequence Data; D005810:Multigene Family; D010619:Phenazines / Q000378:metabolism; D010636:Phenols; D011549:Pseudomonas / Q000235:genetics* / Q000378:metabolism*; D011758:Pyrroles
chemical_list: D000900:Anti-Bacterial Agents; D010619:Phenazines; D010636:Phenols; D011758:Pyrroles; C095503:pyoluteorin; C037165:1-phenazinecarboxylic acid