Affiliation:
1. Department of Biology, Emory University, Atlanta, GA 30322, USA
Abstract
Poly(A) polymerases (PAPs) and tRNA nucleotidyltransferases belong to a superfamily of nucleotidyltransferases and modify RNA 3′-ends. The product of the pcnB gene, PAP I, has been characterized in a few β-, γ- and δ-
Proteobacteria
. Using the PAP I signature sequence, putative PAPs were identified in bacterial species from the α- and ε-
Proteobacteria
and from four other bacterial phyla (
Firmicutes
,
Actinobacteria
,
Bacteroidetes
and
Aquificae
). Phylogenetic analysis, alien index and G+C content calculations strongly suggest that the PAPs in the species identified in this study arose by horizontal gene transfer from the β- and γ-
Proteobacteria
.
Cited by
4 articles.
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