Abstract:
:We have found that the bacterial transposon Tn7 can recognize and preferentially insert adjacent to triple-helical nucleic acid structures. Both synthetic intermolecular triplexes, formed through the pairing of a short triplex-forming oligonucleotide on a plasmid DNA, and naturally occurring mirror repeat sequences known to form intramolecular triplexes or H-form DNA are preferential targets for Tn7 insertion in vitro. This target site selectivity depends upon the recognition of the triplex region by a Tn7-encoded ATP-using protein, TnsC, which controls Tn7 target site selection: the interaction of TnsC with the triplex region results in recruitment and activation of the Tn7 transposase. Recognition of a nucleic acid structural motif provides both new information into the factors that influence Tn7's target site selection and broadens its targeting capabilities.
journal_name
Proc Natl Acad Sci U S Aauthors
Rao JE,Miller PS,Craig NLdoi
10.1073/pnas.080061497keywords:
subject
Has Abstractpub_date
2000-04-11 00:00:00pages
3936-41issue
8eissn
0027-8424issn
1091-6490pii
080061497journal_volume
97pub_type
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