title: DNA sequence and translational product of a new nodulation-regulatory locus: syrM has sequence similarity to NodD proteins.
abstract: Rhizobium meliloti nodulation (nod) genes are expressed when activated by trans-acting proteins in the NodD family. The nodD1 and nodD2 gene products activate nod promoters when cells are exposed to plant-synthesized signal molecules. Alternatively, the same nod promoters are activated by the nodD3 gene when nodD3 is carried in trans along with a closely linked global regulatory locus, syrM (symbiotic regulator) (J. T. Mulligan and S. R. Long, Genetics 122:7-18, 1989). In this article we report the nucleotide sequence of a 2.6-kilobase SphI fragment from R. meliloti SU47 containing syrM. Expression from this locus was confirmed by using in vitro transcription-translation assays. The open reading frame encoded a protein of either 33 or 36 kilodaltons whose sequence shows similarity to NodD regulatory proteins.
authors.affiliation: Department of Biological Sciences, Stanford University, California 94305-5020.
authors.forename: M J
authors.initials: MJ
authors.lastname: Barnett
authors.forename: S R
authors.initials: SR
authors.lastname: Long
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D004269:DNA, Bacterial / Q000235:genetics*; D004268:DNA-Binding Proteins; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009586:Nitrogen Fixation / Q000235:genetics*; D011401:Promoter Regions, Genetic; D014176:Protein Biosynthesis; D012231:Rhizobium / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D015534:Trans-Activators; D014157:Transcription Factors / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; C060773:NodD protein, Bacteria; C064814:SyrM protein, Rhizobium meliloti; D015534:Trans-Activators; D014157:Transcription Factors