Acquisition, reorganization, and merger of genes: novel management of the β-ketoadipate pathway in Agrobacterium tumefaciens
- 1 January 1997
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 146 (1) , 3-12
- https://doi.org/10.1016/s0378-1097(96)00382-5
Abstract
Widely distributed among members of the Rhizobiaceae, the protocatechuate branch of the β-ketoadipate pathway is central to the catabolism of 4-hydroxybenzoate and certain other phenolic compounds. Genetic elements underlying 4-hydroxybenzoate dissimilation in Agrobacterium tumefaciens have been characterized. Eleven pob and pca genes are organized in a compact supraoperon. Evolutionary divergence of A. tumefaciens from Pseudomonas putida and Acinetobacter calcoaceticus , members of a different subdivision of proteobacteria, is reflected in the layout of the pob-pca supraoperon as well as in novel regulatory motifs that govern expression of the genes. At least some of these distinctive features are shared with rhizobial relatives of Agrobacterium .Keywords
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