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. 1988 Apr 11;16(7):3075–3089. doi: 10.1093/nar/16.7.3075

Cloning and characterization of a gene from Rhizobium melilotii 2011 coding for ribosomal protein S1.

J Schnier 1, S Thamm 1, R Lurz 1, A Hussain 1, G Faist 1, B Dobrinski 1
PMCID: PMC336453  PMID: 3368316

Abstract

A 7 kb chromosomal DNA fragment from R. melilotii was cloned, which complemented temperature-sensitivity of an E. coli amber mutant in rpsA, the gene for ribosomal protein S1 (ES1). From complementation and maxicell analysis a 58 kd protein was identified as the homolog of protein S1 (RS1). DNA sequence analysis of the R. melilotii rpsA gene identified a protein of 568 amino acids, which showed 47% identical amino acid homology to protein S1 from E. coli. The RS1 protein lacked the two Cys residues which had been reported to play an important role for the function of ES1. Two repeats containing Shine-Dalgarno sequences were identified upstream of the structural gene. Binding studies with RNA polymerase from E. coli and Pseudomonas putida located one RNA-polymerase binding site close to the RS1 gene and another one several hundred basepairs upstream. One possible promoter was also identified by DNA sequence comparison with the corresponding E. coli promoter.

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Selected References

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