title: Isolation of point mutations in bacteriophage Mu attachment regions cloned in a lambda::mini-Mu phage.
abstract: Twenty-one derivatives of a lambda::mini-Mu phage containing point mutations in the Mu attachment regions were isolated after mutD mutagenesis and selection for relief from Mu-specific replicative interference of lambda growth. DNA sequence analysis revealed that the single left-end mutant had suffered a T----C transition at position 1 of the Mu sequence, while the remaining 20 right-end mutants contained single base-pair insertions or deletions within the terminal 19 base pairs. A genetic assay showed that the right-end mutations revealed by sequencing were necessary for relief of the replicative inhibition of lambda growth. The properties of these mutants suggest that the terminal 2-base-pair and subterminal 8-base-pair inverted repeats are important for Mu-specific replicative transposition.
mesh_terms: D010582:Bacteriophage lambda / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D003090:Coliphages / Q000235:genetics*; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000235:genetics*; D005838:Genotype; D009154:Mutation; D010957:Plasmids; D011991:Receptors, Virus / Q000235:genetics; D013045:Species Specificity
chemical_list: D011991:Receptors, Virus; D004262:DNA Restriction Enzymes