The xylS gene positive regulator of TOL plasmid pWWO: identification, sequence analysis and overproduction leading to constitutive expression of meta cleavage operon.

Détails

ID Serval
serval:BIB_0933BCDF3B43
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The xylS gene positive regulator of TOL plasmid pWWO: identification, sequence analysis and overproduction leading to constitutive expression of meta cleavage operon.
Périodique
Molecular and General Genetics
Auteur(s)
Mermod N., Ramos J.L., Bairoch A., Timmis K.N.
ISSN
0026-8925[print], 0026-8925[linking]
Statut éditorial
Publié
Date de publication
05/1987
Volume
207
Numéro
2-3
Pages
349-354
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
The Pseudomonas putida TOL plasmid pWWO carries an operon that specifies a meta-cleavage pathway for the catabolism of benzoate and toluates whose transcription is positively regulated by the xylS gene product. Stimulation of transcription of the operon is thought to result from activation of this protein by pathway substrates/effectors. In the present study, overexpression of the xylS gene has led to identification of the regulator as a 33 kDa protein. Overexpression of xylS also resulted in partially constitutive, i.e. effector-independent expression of the meta-cleavage operon. Determination of the polynucleotide sequence of the xylS gene revealed amino acid sequence homology with several DNA binding proteins, particularly with the araC products of Escherichia coli and Salmonella typhimurium and with the nifA and ntrC products of Klebsiella pneumoniae. Homologous sequences were mainly located in an alpha-helix-turn-alpha-helix domain of the polypeptide. Interestingly, amino acid sequence homology was also found with sigma factors of E. coli (ntrA and htpR products) and Bacillus subtilis (spoIIG and phage SPOI Gp34 products) and other RNA polymerase core-interacting proteins, such as the E. coli nusA product.
Mots-clé
Amino Acid Sequence, Bacterial Proteins/genetics, Base Sequence, Genes, Genes, Bacterial, Genes, Regulator, Operon, Plasmids, Pseudomonas/genetics, Sequence Homology, Nucleic Acid, Transcription, Genetic
Pubmed
Web of science
Création de la notice
24/01/2008 11:41
Dernière modification de la notice
03/03/2018 13:31
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