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. 1995 Nov;177(21):6077–6082. doi: 10.1128/jb.177.21.6077-6082.1995

Transcription of the archaeal trkA homolog in Methanosarcina mazei S-6.

E Conway de Macario 1, A J Macario 1
PMCID: PMC177445  PMID: 7592370

Abstract

Transcription of the archaeal trkA gene homolog in Methanosarcina mazei S-6 was studied at the optimal growth temperature of 37 degrees C and after heat shock at 45 degrees C. Northern (RNA) blotting results (transcript size) and data from primer extension experiments to map the transcription initiation site indicate that trkA is cotranscribed with another gene. The latter, orf11, encodes a protein of 94 amino acids (10,611 Da) and is located upstream of trkA, with which it overlaps: the translation stop codon of orf11, TGA, shares the bases T and G with the translation start codon of trkA, ATG. These genes' transcription was decreased by heat shock to the point of making the transcript undetectable by Northern or dot blotting procedures. orf11 and trkA differ in codon usage patterns, and the proteins coded by them, i.e., Orf11 and TrkA, are dissimilar in amino acid sequence and composition.

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Selected References

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