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The sequence, and its evolutionary implications, of a Thermococcus celer protein associated with transcriptionThrough 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.
Document ID
20050000360
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kaine, B. P.
(University of Illinois Urbana 61801)
Mehr, I. J.
Woese, C. R.
Date Acquired
August 22, 2013
Publication Date
April 26, 1994
Publication Information
Publication: Proceedings of the National Academy of Sciences of the United States of America
Volume: 91
Issue: 9
ISSN: 0027-8424
Subject Category
Exobiology
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Exobiology

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