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. 1990 Sep;172(9):5470–5476. doi: 10.1128/jb.172.9.5470-5476.1990

Nucleotide sequence of the gene encoding the repressor for the histidine utilization genes of Pseudomonas putida.

S L Allison 1, A T Phillips 1
PMCID: PMC213214  PMID: 2203753

Abstract

The hutC gene of Pseudomonas putida encodes a repressor which, in combination with the inducer urocanate, regulates expression of the five structural genes necessary for conversion of histidine to glutamate, ammonia, and formate. The nucleotide sequence of the hutC region was determined and found to contain two open reading frames which overlapped by one nucleotide. The first open reading frame (ORF1) appeared to encode a 27,648-dalton protein of 248 amino acids whose sequence strongly resembled that of the hut repressor of Klebsiella aerogenes (A. Schwacha and R. A. Bender, J. Bacteriol. 172:5477-5481, 1990) and contained a helix-turn-helix motif that could be involved in operator binding. The gene was preceded by a sequence which was nearly identical to that of the operator site located upstream of hutU which controls transcription of the hutUHIG genes. The operator near hutC would presumably allow the hut repressor to regulate its own synthesis as well as the expression of the divergent hutF gene. A second open reading frame (ORF2) would encode a 21,155-dalton protein, but because this region could be deleted with only a slight effect on repressor activity, it is not likely to be involved in repressor function or structure.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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