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Underrepresentation of short palindromes in Selenomonas ruminantium DNA: evidence for horizontal gene transfer of restriction and modification systems?
Pristas P, Piknova M.
Jazyk angličtina Země Kanada
NLK
ProQuest Central
od 1998-04-01 do 2007-05-31
Medline Complete (EBSCOhost)
od 2001-01-01
Nursing & Allied Health Database (ProQuest)
od 1998-04-01 do 2007-05-31
Health & Medicine (ProQuest)
od 1998-04-01 do 2007-05-31
- MeSH
- bachor mikrobiologie MeSH
- DNA bakterií genetika MeSH
- financování vládou MeSH
- Markovovy řetězce MeSH
- přenos genů horizontální MeSH
- restrikční endonukleasy typu II genetika MeSH
- Selenomonas genetika MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
Molecular analysis of isolates of the rumen bacterium Selenomonas ruminantium revealed a high variety and frequency of site-specific (restriction) endonucleases. While all known S. ruminantium restriction and modification systems recognize hexanucleotide sequences only, consistently low counts of both 6-bp and 4-bp palindromes were found in DNA sequences of S. ruminantium. Statistical analysis indicated that there is some correlation between the degree of underrepresentation of tetranucleotide words and the number of known restriction endonucleases for a given sequence. Control analysis showed the same correlation in lambda DNA but not in human adenovirus DNA. Based on the data presented, it could be proposed that there is a much higher historical occurrence of restriction and modification systems in S. ruminantium and (or) frequent horizontal gene transfer of restriction and modification gene complexes.
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- $a Molecular analysis of isolates of the rumen bacterium Selenomonas ruminantium revealed a high variety and frequency of site-specific (restriction) endonucleases. While all known S. ruminantium restriction and modification systems recognize hexanucleotide sequences only, consistently low counts of both 6-bp and 4-bp palindromes were found in DNA sequences of S. ruminantium. Statistical analysis indicated that there is some correlation between the degree of underrepresentation of tetranucleotide words and the number of known restriction endonucleases for a given sequence. Control analysis showed the same correlation in lambda DNA but not in human adenovirus DNA. Based on the data presented, it could be proposed that there is a much higher historical occurrence of restriction and modification systems in S. ruminantium and (or) frequent horizontal gene transfer of restriction and modification gene complexes.
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