3'-5' DNA helicase that may play a role in the repair of DNA (PubMed:18419780, PubMed:19755539). Its DNA unwinding activity in vitro is dependent on magnesium, and ATP or dATP (PubMed:18419780, PubMed:19755539). Can use GTP/dGTP, CTP/dCTP or UTP/dUTP as nucleotide cofactors (PubMed:18419780, PubMed:19755539). Catalyzes Holliday junction branch migration and replication fork regression (PubMed:19755539, PubMed:23771268). Disrupts D-loop structures (PubMed:18419780). ATP + H2O = ADP + H(+) + phosphate Interacts with WEX. Expressed in shoots and flowers (PubMed:11058127, PubMed:12856935). Expressed in young leaves, inflorescences, roots, shoot apical meristem, young siliques, and mature green siliques (PubMed:12856935). Baeckstroem et al identified RECQL2 in a Mediator complex pull-down assay and suggested that RECQL2 could be a plant specific component of the Mediator complex (PubMed:17560376). However, no experimental evidence has been brought so far to confirm this hypothesis (Probable). Belongs to the helicase family. RecQ subfamily.