Oct 1, 1989

(S)-3-hydroxy-3-methylglutaryl coenzyme A reductase, a product of the mva operon of Pseudomonas mevalonii, is regulated at the transcriptional level

Journal of Bacteriology
Y L WangV W Rodwell


We have cloned and sequenced a 505-base-pair (bp) segment of DNA situated upstream of mvaA, the structural gene for (S)-3-hydroxy-3-methylglutaryl coenzyme A reductase (EC of Pseudomonas mevalonii. The DNA segment that we characterized includes the promoter region for the mva operon. Nuclease S1 mapping and primer extension analysis showed that mvaA is the promoter-proximal gene of the mva operon. Transcription initiates at -56 bp relative to the first A (+1) of the translation start site. Transcription in vivo was induced by mevalonate. Structural features of the mva promoter region include an 80-bp A + T-rich region, and -12, -24 consensus sequences that resemble sequences of sigma 54 promoters in enteric organisms. The relative amplitudes of catalytic activity, enzyme protein, and mvaA mRNA are consistent with a model of regulation of this operon at the transcriptional level.

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Mentioned in this Paper

Gene Expression Regulation, Bacterial
Coenzyme A
Primer Extension
Transcription, Genetic
Hydroxymethylglutaryl-CoA reductase
Enzyme Activity
Genes, Bacterial
Structural gene

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