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PMID: 2703463 Published · ppublish English Comparative Study Journal Article Research Support, Non-U.S. Gov't

Identification of a gene linked to Rhizobium meliloti ntrA whose product is homologous to a family to ATP-binding proteins.

Journal of bacteriology ·Vol. 171 ·No. 4 ·1989-04-00 ·Pages 1932-41

Albright LM, Ronson CW, Nixon BT, Ausubel FM

Abstract

The ntrA gene of Rhizobium meliloti has recently been identified and shown to be required for a diverse set of metabolic functions (C. W. Ronson, B. T. Nixon, L. M. Albright, and F. M. Ausubel, J. Bacteriol. 169:2424-2431, 1987). As a result of sequencing the ntrA gene and its flanking regions from R. meliloti, we identified an open reading frame directly upstream of ntrA, ORF1, whose predicted product is homologous to a superfamily of ATP-binding proteins involved in transport, cell division, nodulation, and DNA repair. The homology of ORF1 to this superfamily and its proximity to ntrA led us to investigate its role in symbiosis by mutagenesis and expression studies. We were unable to isolate an insertion mutation in ORF1, suggesting that ORF1 may code for an essential function. We identified the start of transcription for the ntrA gene in vegetative cells and bacteroids and showed that ORF1 and ntrA are transcriptionally unlinked. ORF1 appears to be in an operon with one or more upstream genes.

MeSH Terms
Amino Acid Sequence Bacterial Proteins/genetics Base Sequence Carrier Proteins/genetics Chromosome Mapping Codon DNA Mutational Analysis Molecular Sequence Data Multigene Family Peptide Chain Initiation, Translational Rhizobium/genetics Transcription, Genetic
Chemicals
Bacterial Proteins Carrier Proteins Codon
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Albright L M
Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115.
Ronson C W
Nixon B T
Ausubel F M
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41 references, click to expand
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Article Info
Journal
Journal of bacteriology
Abbr.
J Bacteriol
ISSN
0021-9193
Published
1989-04-00
Pages
1932-41
Language
English
Region
United States
NLM ID
2985120R
PMCID
PMC209842
Subset
IM
Databases
GENBANK
M24926
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