Nucleotide sequence and functional analysis of the meta-cleavage pathway involved in biphenyl and polychlorinated biphenyl degradation in Pseudomonas sp. strain KKS102.
AUTOR(ES)
Kikuchi, Y
RESUMO
Pseudomonas sp. strain KKS102 is able to degrade biphenyl and polychlorinated biphenyls via the meta-cleavage pathway. We sequenced the upstream region of the bphA1A2A3BCD (open reading frame 1 [ORF1]) A4 and found four ORFs in this region. As the deduced amino acid sequences of the first, second, and third ORFs are homologous to the meta-cleavage enzymes from Pseudomonas sp. strain CF600 (V. Shingler, J. Powlowski, and U. Marklund, J. Bacteriol. 174:711-724, 1992), these ORFs have been named bphE, bphG, and bphF, respectively. The fourth ORF (ORF4) showed homology with ORF3 from Pseudomonas pseudoalcaligenes KF707 (K. Taira, J. Hirose, S. Hayashida, and K. Furukawa, J. Biol. Chem. 267:4844-4853, 1992), whose function is unknown. The functions of meta-cleavage enzymes (BphE, BphG, and BphF) were analyzed by using crude extracts of Escherichia coli which expressed the encoding genes. The results showed that bphE, bphG, and bphF encode 2-hydroxypenta-2,4-dienoate hydratase, acetaldehyde dehydrogenase (acylating), and 4-hydroxy-2-oxovalerate aldolase, respectively. The biphenyl and polychlorinated biphenyl degradation pathway of KKS102 is encoded by 12 genes in the order bphEGF (ORF4)A1A2A3BCD (ORF1)A4. The functions of ORF1 and ORF4 are unknown. The features of this bph gene cluster are discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=205638Documentos Relacionados
- Identification of the bphA4 gene encoding ferredoxin reductase involved in biphenyl and polychlorinated biphenyl degradation in Pseudomonas sp. strain KKS102.
- Cloning and sequencing of two tandem genes involved in degradation of 2,3-dihydroxybiphenyl to benzoic acid in the polychlorinated biphenyl-degrading soil bacterium Pseudomonas sp. strain KKS102.
- Molecular and biochemical characterization of two meta-cleavage dioxygenases involved in biphenyl and m-xylene degradation by Beijerinckia sp. strain B1.
- Cloning of genes involved in carbazole degradation of Pseudomonas sp. strain CA10: nucleotide sequences of genes and characterization of meta-cleavage enzymes and hydrolase.
- Control of meta-cleavage degradation of 4-hydroxyphenylacetate in Pseudomonas putida.