Nucleic Acids Research, Vol 24, Issue 20 4096-4097, Copyright © 1996 by Oxford University Press
TL McMahon, Z Wilczynska, C Barth, DJ Fraser, L Pontes and PR Fisher
A novel cloning strategy, replicon rescue, was developed for cloning genes
disrupted by plasmid insertions. After ligation to a tetracycline
resistance cassette, fragments containing a bacterial origin of replication
from the insertion are recovered in Escherichia coli because they replicate
autonomously. Restriction enzymes for cloning are so chosen that the only
legitimate two fragment ligation yielding TetR clones involves a fragment
spanning the boundary of the insertion. Replicon rescue was used
successfully firstly in a test system to clone the chromosomal orl from a
Klebsiella aerogenes strain, and secondly to recover a disrupted gene from
a phototaxis-deficient mutant of Dictyostelium.
ARTICLES
Replicon rescue: a novel strategy to clone the genomic DNA flanking insertions of integrating shuttle vector DNA
School of Microbiology, La Trobe University, Melbourne, Victoria, Australia.
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