Diversity of retron elements in a population of rhizobia and other gram-negative bacteria.
AUTOR(ES)
Rice, S A
RESUMO
Genetic elements called retrons reside on the chromosome of Escherichia coli and the myxobacteria and represent the first reverse transcriptase-encoding element to be found in a prokaryotic cell. All known retrons produce a functionally obscure RNA-DNA satellite molecule called multicopy single-stranded DNA (msDNA). We report here the presence of msDNA-producing retron elements in a number of new bacterial groups, including strains of the genera Proteus, Klebsiella, Salmonella, Nannocystis, Rhizobium, and Bradyrhizobium. Among a population of 63 rhizobia strains, only 16% contain a retron element. The rhizobia retrons appear to be heterogeneous in nucleotide sequence and show little similarity to previously studied retrons of E. coli and the myxobacteria.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=204857Documentos Relacionados
- Replication of plasmids in gram-negative bacteria.
- Electrochemical classification of gram-negative and gram-positive bacteria.
- Nisin treatment for inactivation of Salmonella species and other gram-negative bacteria.
- Multidrug efflux pumps of gram-negative bacteria.
- Phospholipase D activity of gram-negative bacteria.