Medical Definition of Rec A protein
1.
A protein (40 kD) product of the rec (recombination) gene, that catalyses the pairing of a single stranded piece of DNA with its complementary sequence, displacing a loop of single stranded DNA (D loop).
It catalyses the ATP-driven exchange of DNA strands in genetic recombination. The product of the reaction consists of a duplex and a displaced single-stranded loop which has the shape of the letter d and is therefore called a d-loop structure.
ATP is hydrolyzed to ADP during the reaction; also has proteolytic activity.
(22 Sep 2002)
Lexicographical Neighbors of Rec A Protein
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