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  • Title: Cloning and characterization of a sigma 70 homologue gene, sigA from Corynebacterium ammoniagenes.
    Author: Lee BR, Kim JH.
    Journal: Biotechnol Lett; 2004 Apr; 26(7):589-94. PubMed ID: 15168860.
    Abstract:
    A sigma 70-like gene, sigA, has been identified from Corynebacterium ammoniagenes. The sigA gene encodes a polypeptide of 467 amino acids with a calculated molecular mass of 52036 Da. The deduced amino acid sequence preserves the common motifs of the primary sigma factors and shows very high similarity to those of SigA (sigmaA) homologues from high G+C Gram-positive bacteria, which suggest that the sigA gene encodes the primary sigma factor. The sigA gene is transcribed as a monocistronic mRNA of 2 kb and its mRNA occurs during the exponential growth phase and decays rapidly on entry into the stationary phase. The open reading frame encoding polyphosphate glucokinase-like protein is closely linked to the sigA gene.
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