ATP-dependent RecD2 DNA helicase

UniProtKB accession:  Q9RT63

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UniProtKB description:  DNA-dependent ATPase (ssDNA stimulates the ATPase better than dsDNA) and ATP-dependent 5'-3' DNA helicase (PubMed:15466873, PubMed:19490894). Plays a role in an antioxidant pathway (PubMed:17419762). Involved in DNA damage repair and/or recombination (PubMed:17496087). Appears to move along DNA in single base steps, powered by hydrolysis of 1 molecule of ATP (PubMed:19490894). Has low processivity, unwinds about 15-20 base pairs/second (PubMed:15466873, PubMed:20360003). Short (20 bp) substrates with 5'-overhangs or forked ends are the best substrates, is much less efficient on 52 or 76 bp substrates with 5'-overhangs (PubMed:15466873). The presence of single-stranded DNA-binding protein (SSB) increases unwinding 4-5 fold (PubMed:15466873). Has no activity on blunt DNA or DNA with 3'-overhangs (PubMed:15466873). Requires at least 10 bases of 5'-ssDNA for helicase activity (PubMed:15466873).