Primary structural comparison of RNA-dependent polymerases from plant, animal and bacterial viruses
- 1 January 1984
- journal article
- research article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 12 (18), 7269-7282
- https://doi.org/10.1093/nar/12.18.7269
Abstract
Possible alignments for portions of the genomic codons in eight different plant and animal viruses are presented: tobacco mosaic, brome mosaic, alfalfa mosaic, sindbis, foot-and-mouth disease, polio, encephalomyocarditis, and cowpea mosaic viruses. Since in one of the viruses (polio) the aligned sequence has been identified as an RNA-dependent polymerase, this would imply the identification of the polymerases in the other viruses. A conserved fourteen-residue segment consisting of an Asp-Asp sequence flanked by hydrophobic residues has also been found in retroviral reverse transcriptases, a bacteriophage, influenza virus, cauliflower mosaic virus and hepatitis B virus, suggesting this span as a possible active site or nucleic acid recognition region for the polymerases. Evolutionary implications are discussed.Keywords
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