Transcription of the archaeal trkA homolog in Methanosarcina mazei S-6.
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.
Conway de Macario
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Wadsworth Center, Division of Molecular Medicine, New York State Department of Health, Albany 12201-0509, USA.
Macario
A J
AJ
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics; D001483:Base Sequence; D015152:Blotting, Northern; D002352:Carrier Proteins / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D005815:Genetic Code; D018869:Heat-Shock Response; D008565:Membrane Proteins / Q000235:genetics*; D017020:Methanosarcina / Q000235:genetics*; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D020917:Receptor, trkA; D017386:Sequence Homology, Amino Acid; D014158:Transcription, Genetic
D001426:Bacterial Proteins; D002352:Carrier Proteins; D008565:Membrane Proteins; D012333:RNA, Messenger; D020917:Receptor, trkA