✦ LIBER ✦

Evolution of therecAgene and the molecular phylogeny of bacteria

✍ Scribed by Andrew T. Lloyd; Paul M. Sharp

Publisher: Springer
Year: 1993
Tongue: English
Weight: 888 KB
Volume: 37
Category: Article
ISSN: 0022-2844
DOI: 10.1007/bf00178869

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✦ Synopsis

The DNA sequences of the recA gene from 25 strains of bacteria are known. The evolution of these recA gene sequences, and of the derived RecA protein sequences, is examined, with special reference to the effect of variations in genomic G + C content. From the aligned RecA protein sequences, phylogenetic trees have been drawn using both distance matrix and maximum parsimony methods. There is a broad concordance between these trees and those derived from other data (largely 16S ribosomal RNA sequences). There is a fair degree of certainty in the relationships among the "Purple" or Proteobacteria, but the branching pattern between higher taxa within the eubacteria cannot be reliably resolved with these data.

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