Abstract:
:A widespread and highly conserved family of apparently inactivated derivatives of archaeal B-family DNA polymerases is described. Phylogenetic analysis shows that the inactivated forms comprise a distinct clade among archaeal B-family polymerases and that, within this clade, Euryarchaea and Crenarchaea are clearly separated from each other and from a small group of bacterial homologs. These findings are compatible with an ancient duplication of the DNA polymerase gene followed by inactivation and parallel loss in some of the lineages although contribution of horizontal gene transfer cannot be ruled out. The inactivated derivative of the archaeal DNA polymerase could form a complex with the active paralog and play a structural role in DNA replication.
journal_name
Biol Directjournal_title
Biology directauthors
Rogozin IB,Makarova KS,Pavlov YI,Koonin EVdoi
10.1186/1745-6150-3-32subject
Has Abstractpub_date
2008-08-06 00:00:00pages
32issn
1745-6150pii
1745-6150-3-32journal_volume
3pub_type
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