Journal article
An Essential Role for actA in Acid Tolerance of Rhizobium Melilotix
Microbiology, Vol.142(3), pp.601-610
1996
Abstract
The actA gene, which is disrupted by Tn5 in the acid-sensitive mutant of Rhizobium meliloti TG2-6, was cloned and sequenced. It encodes a protein of 541 amino acids with a calculated molecular mass of 57963 Da and an estimated pI of 9.0. The ActA protein sequence has 30% identity, and much higher similarity (69%), with the CutE protein of Escherichia coli. Like the cutE mutant of E. coli TG2-6 is sensitive to copper. The reconstructed wild-type actA gene complemented the low pH- and copper-sensitive phenotype of TG2-6. Studies with an actA-lacZ gene fusion showed that actA is constitutively expressed at pH 5.8 and 7.0. The actA gene appears to be chromosomal and is present in all seven strains of R. meliloti tested.
Details
- Title
- An Essential Role for actA in Acid Tolerance of Rhizobium Melilotix
- Authors/Creators
- R.P. Tiwari (Author/Creator)W.G. Reeve (Author/Creator)M.J. Dilworth (Author/Creator)A.R. Glenn (Author/Creator)
- Publication Details
- Microbiology, Vol.142(3), pp.601-610
- Publisher
- Society for General Microbiology
- Identifiers
- 991005543992907891
- Copyright
- © 1996 Society for General Microbiology.
- Murdoch Affiliation
- Centre for Rhizobium Studies
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.97 Plant Pathology
- 3.97.892 Rhizobium-Legume Symbiosis
- Web Of Science research areas
- Microbiology
- ESI research areas
- Microbiology