Two mutations of phage mu transposase that affect strand transfer or interactions with B protein lie in distinct polypeptide domains.

Abstract excerpt

Two mutations within the transposase (the A protein) gene of phage Mu with distinct effects on DNA transposition have been studied. The first mutation maps to the central domain (domain II) of A, a protein consisting of three major structural domains. The variant protein is normal in synapsis and cleavage of Mu ends but is temperature-sensitive in the strand transfer reaction, joining the Mu ends to target DNA....

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