The nucleotide sequence of the sigma factor gene ntrA (rpoN) of Azotobacter vinelandii: Analysis of conserved sequences in NtrA proteins
- 1 December 1987
- journal article
- research article
- Published by Springer Nature in Molecular Genetics and Genomics
- Vol. 210 (2), 323-330
- https://doi.org/10.1007/bf00325701
Abstract
The nucleotide sequence of the Azotobacter vinelandii ntrA gene has been determined. It encodes a 56916 Dalton acidic polypeptide (AvNtrA) with substantial homology to NtrA from Klebsiella pneumoniae (KpNtrA) and Rhizobium meliloti (RmNtrA). NtrA has been shown to act as a novel RNA polymerase sigma factor but the predicted sequence of AvNtrA substantiates our previous analysis of KpNtrA in showing no substantial homology to other known sigma factors. Alignment of the predicted amino acid sequences of AvNtrA, KpNtrA and RmNtrA identified three regions; two showing>50% homology and an intervening sequence of A. vinelandii, ntrA is followed by another open reading frame (ORF) which is highly homologous to a comparable ORF downstream of ntrA in K. pneumoniae and R. meliloti.This publication has 50 references indexed in Scilit:
- The genetic analysis of nitrogen fixation, oxygen tolerance and hydrogen uptake in azotobactersPhilosophical Transactions of the Royal Society of London. B, Biological Sciences, 1987
- Structure and Function in a Bacillus subtilis Sporulation-specific Sigma Factor: Molecular Nature of Mutations in spoIIACMicrobiology, 1987
- Two functional domains conserved in major and alternate bacterial sigma factorsFEBS Letters, 1985
- The Genetic Complexity of Nitrogen FixationMicrobiology, 1984
- PROTEIN-DNA RECOGNITIONAnnual Review of Biochemistry, 1984
- Regulation of nitrogen fixation(nif)genes ofAzospirillum brasilensebynifAandntr (gln)type gene productsFEMS Microbiology Letters, 1984
- Regulation of nitrogen fixation genesCell, 1984
- The nif promoters of Klebsiella pneumoniae have a characteristic primary structureCell, 1983
- Repressor structure and the mechanism of positive controlCell, 1983
- GENETIC CONTROL OF NITROGEN ASSIMILATION IN BACTERIAAnnual Review of Genetics, 1982