Recombinant Human Helicase POLQ-like (HELQ), partial

QERKNLIYSLPTSGGKTLVAEILMLQELLCCRKDVLMILPYVAIVQEKISGLSSFGIELGFFVEEYAGSKGRFPPTKRREKKSLYIATIEKGHSLVNSLIETGRIDSLGLVVVDELHMIGEGSRGATLEMTLAKILYTSKTTQIIGMSATLNNVEDLQKFLQAEYYTSQFRPVELKEYLKINDTIYEVDSKAENGMTFSRLLNYKYSDTLKKMDPDHLVALVTEVIPNYSCLVFCPSKKNCENVAEMICKFLSKEYLKHKEKEKCEVIKNLKNIGNGNLCPVLKRTIPFGVAYHHSGLTSDERKLLEEAYSTGVLCLFTCTSTLAAGVNLPARRVILRAPYVAKEFLKRNQYKQMIGRAGRAGIDTIGESILILQEK

Single-stranded 3'-5' DNA helicase that plays a key role in homology-driven double-strand break (DSB) repair. Involved in different DSB repair mechanisms that are guided by annealing of extensive stretches of complementary bases at break ends, such as microhomology-mediated end-joining (MMEJ), single-strand annealing (SSA) or synthesis-dependent strand annealing (SDSA) . Possesses both DNA unwinding and annealing activities. Forms a complex with RAD51, stimulating HELQ DNA helicase activity and ability to unwing DNA. Efficiently unwinds substrates containing 3' overhangs or a D-loop. In contrast, interaction with the replication protein A (RPA/RP-A) complex inhibits DNA unwinding by HELQ but strongly stimulates DNA strand annealing. Triggers displacement of RPA from single-stranded DNA to facilitate annealing of complementary sequences.

If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.