On the early evolution of RNA polymerase - PubMed (original) (raw)

Comparative Study

doi: 10.1007/BF02101199.

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Comparative Study

On the early evolution of RNA polymerase

A Lazcano et al. J Mol Evol. 1988.

Abstract

The lines of evidence suggesting that RNA preceded double-stranded DNA as an informational macromolecule are briefly reviewed. RNA polymerase is hypothesized to have been one of the earliest proteins to appear. It is argued that an important vestige of the original enzyme is found in the contemporary eubacterial beta' subunit of DNA-dependent RNA polymerase and its homologues among the archaebacterial and eukaryotic enzymes. The evidence that supports a catalytic role in replicase activity of this polypeptide is reviewed. It is suggested that several characteristics of the Escherichia coli transcriptional apparatus are relatively recent evolutionary developments. The phylogenetic importance of the eubacterial beta' subunit from RNA polymerase and its homologues is emphasized, because it allows the study of the evolutionary relationships of the major cellular lines (eubacteria, archaebacteria, and eukaryotes) as well as of some viral lineages.

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References

    1. Nucleic Acids Res. 1984 Aug 10;12(15):6231-46 - PubMed
    1. Proc Natl Acad Sci U S A. 1981 Nov;78(11):6932-5 - PubMed
    1. Biochemistry. 1982 Sep 14;21(19):4651-6 - PubMed
    1. Proc Natl Acad Sci U S A. 1985 Dec;82(23):7934-8 - PubMed
    1. J Biol Chem. 1979 Nov 25;254(22):11282-7 - PubMed

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