Protein: DNA replication ATP-dependent helicase/nuclease DNA2 [Includes: DNA replication nuclease DNA2 (EC 3.1.-.-); DNA replication ATP-dependent helicase DNA2 (EC 3.6.4.12)] (P38859)
Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Function: Key enzyme involved in DNA replication and DNA repair. Involved in Okazaki fragments processing by cleaving long flaps that escape FEN1: flaps that are longer than 27 nucleotides are coated by replication protein A complex (RPA), leading to recruit DNA2 which cleaves the flap until it is too short to bind RPA and becomes a substrate for FEN1. Also involved in 5'-end resection of DNA during double-strand break (DSB) repair by mediating the cleavage of 5'-ssDNA. Possesses different enzymatic activities, such as single-stranded DNA (ssDNA)-dependent ATPase, 5'-3' helicase and endonuclease activities. While the ATPase and endonuclease activities are well-defined and play a key role in Okazaki fragments processing and DSB repair, the 5'-3' DNA helicase activity is atypical: it cannot load onto its tracking strand internally and has an absolute free 5'-end requirement. Helicase activity may promote the motion of DNA2 on the flap, helping the nuclease function.
Subcellular location: Nucleus. Chromosome. Note=Recruited to double-strand. break (DSB) sites following phosphorylation at Ser-17 and Ser-237.
Interaction partners:
- ATP-dependent helicase SGS1
- Replication factor A protein 1
- DNA topoisomerase 3
- DNA polymerase alpha-binding protein
- Exodeoxyribonuclease 1
- Flap endonuclease 1
- RecQ-mediated genome instability protein 1
- ATP-dependent DNA helicase PIF1
- DNA repair and recombination protein RAD52
- ATP-dependent DNA helicase II subunit 1
Sequence:
MPGTPQKNKRSASISVSPAKKTEEKEIIQNDSKAILSKQTKRKKKYAFAPINNLNGKNTKVSNASVLKSIAVSQVRNTSRTKDINKAVSKSVKQLPNSQVKPKREMSNLSRHHDFTQDEDGPMEEVIWKYSPLQRDMSDKTTSAAEYSDDYEDVQNPSSTPIVPNRLKTVLSFTNIQVPNADVNQLIQENGNEQVRPKPAEISTRESLRNIDDILDDIEGDLTIKPTITKFSDLPSSPIKAPNVEKKAEVNAEEVDKMDSTGDSNDGDDSLIDILTQKYVEKRKSESQITIQGNTNQKSGAQESCGKNDNTKSRGEIEDHENVDNQAKTGNAFYENEEDSNCQRIKKNEKIEYNSSDEFSDDSLIELLNETQTQVEPNTIEQDLDKVEKMVSDDLRIATDSTLSAYALRAKSGAPRDGVVRLVIVSLRSVELPKIGTQKILECIDGKGEQSSVVVRHPWVYLEFEVGDVIHIIEGKNIENKRLLSDDKNPKTQLANDNLLVLNPDVLFSATSVGSSVGCLRRSILQMQFQDPRGEPSLVMTLGNIVHELLQDSIKYKLSHNKISMEIIIQKLDSLLETYSFSIIICNEEIQYVKELVMKEHAENILYFVNKFVSKSNYGCYTSISGTRRTQPISISNVIDIEENIWSPIYGLKGFLDATVEANVENNKKHIVPLEVKTGKSRSVSYEVQGLIYTLLLNDRYEIPIEFFLLYFTRDKNMTKFPSVLHSIKHILMSRNRMSMNFKHQLQEVFGQAQSRFELPPLLRDSSCDSCFIKESCMVLNKLLEDGTPEESGLVEGEFEILTNHLSQNLANYKEFFTKYNDLITKEESSITCVNKELFLLDGSTRESRSGRCLSGLVVSEVVEHEKTEGAYIYCFSRRRNDNNSQSMLSSQIAANDFVIISDEEGHFCLCQGRVQFINPAKIGISVKRKLLNNRLLDKEKGVTTIQSVVESELEQSSLIATQNLVTYRIDKNDIQQSLSLARFNLLSLFLPAVSPGVDIVDERSKLCRKTKRSDGGNEILRSLLVDNRAPKFRDANDDPVIPYKLSKDTTLNLNQKEAIDKVMRAEDYALILGMPGTGKTTVIAEIIKILVSEGKRVLLTSYTHSAVDNILIKLRNTNISIMRLGMKHKVHPDTQKYVPNYASVKSYNDYLSKINSTSVVATTCLGINDILFTLNEKDFDYVILDEASQISMPVALGPLRYGNRFIMVGDHYQLPPLVKNDAARLGGLEESLFKTFCEKHPESVAELTLQYRMCGDIVTLSNFLIYDNKLKCGNNEVFAQSLELPMPEALSRYRNESANSKQWLEDILEPTRKVVFLNYDNCPDIIEQSEKDNITNHGEAELTLQCVEGMLLSGVPCEDIGVMTLYRAQLRLLKKIFNKNVYDGLEILTADQFQGRDKKCIIISMVRRNSQLNGGALLKELRRVNVAMTRAKSKLIIIGSKSTIGSVPEIKSFVNLLEERNWVYTMCKDALYKYKFPDRSNAIDEARKGCGKRTGAKPITSKSKFVSDKPIIKEILQEYES