title: The sequence, and its evolutionary implications, of a Thermococcus celer protein associated with transcription.
abstract: Through random search, a gene from Thermococcus celer has been identified and sequenced that appears to encode a transcription-associated protein (110 amino acid residues). The sequence has clear homology to approximately the last half of an open reading frame reported previously for Sulfolobus acidocaldarius [Langer, D. & Zillig, W. (1993) Nucleic Acids Res. 21, 2251]. The protein translations of these two archaeal genes in turn are homologs of a small subunit found in eukaryotic RNA polymerase I (A12.2) and the counterpart of this from RNA polymerase II (B12.6). Homology is also seen with the eukaryotic transcription factor TFIIS, but it involves only the terminal 45 amino acids of the archaeal proteins. Evolutionary implications of these homologies are discussed.
authors.affiliation: Department of Microbiology, University of Illinois, Urbana 61801.
authors.forename: B P
authors.initials: BP
authors.lastname: Kaine
authors.forename: I J
authors.initials: IJ
authors.lastname: Mehr
authors.forename: C R
authors.initials: CR
authors.lastname: Woese
mesh_terms: D000595:Amino Acid Sequence; D001105:Archaea / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics; D001483:Base Sequence; D005075:Biological Evolution; D003001:Cloning, Molecular; D017931:DNA Primers / Q000737:chemistry; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; D012321:DNA-Directed RNA Polymerases