Article
Symbiotic nitrogen fixation by a nifA deletion mutant of Rhizobium meliloti: the role of an unusual ntrC allele.
Journal of bacteriology - 1 May 1993
Labes M, Rastogi V, Watson R, Finan T M
Abstract excerpt
In the N2-fixing alfalfa symbiont Rhizobium meliloti, the three sigma 54 (NTRA)-dependent positively acting regulatory proteins NIFA, NTRC, and DCTD are required for activation of promoters involved in N2 fixation (pnifHDKE and pfixABCX), nitrogen assimilation (pglnII), and C4-dicarboxylate transport (pdctA), respectively. Here, we describe an allele of ntrC which results in the constitutive activation of the...
Topics
- Alleles
- Amino Acid Sequence
- Bacterial Proteins
- Base Sequence
- Carrier Proteins
- DNA-Binding Proteins
- DNA-Directed RNA Polymerases
- Dicarboxylic Acid Transporters
- Gene Expression Regulation
- Histocytochemistry
- Medicago sativa
- Molecular Sequence Data
- Mutagenesis, Insertional