>TIGR01389 recQ ATP-dependent DNA helicase RecQ; InterPro: IPR006293 The ATP-dependent DNA helicase RecQ (3.6.1 from EC) is involved in genome maintenance . All homologues tested to date unwind paired DNA, translocating in a 3' to 5' direction and several have a preference for forked or 4-way DNA structures (e.g. Holliday junctions) or for G-quartet DNA. The yeast protein, Sgs1, is present in numerous foci that coincide with sites of de novo synthesis DNA, such as the replication fork, and protein levels peak during S-phase. A model has been proposed for Sgs1p action in the S-phase checkpoint response, both as a 'sensor' for damage during replication and a 'resolvase' for structures that arise at paused forks, such as the four-way 'chickenfoot' structure. The action of Sgs1p may serve to maintain the proper amount and integrity of ss DNA that is necessary for the binding of RPA (replication protein A, the eukaryotic ss DNA-binding protein)DNA pol complexes. Sgs1p would thus function by detecting (or resolving) aberrant DNA structures, and would thus contribute to the full activation of the DNA-dependent protein kinase, Mec1p and the effector kinase, Rad53p. Its ability to bind both the large subunit of RPA and the RecA-like protein Rad51p, place it in a unique position to resolve inappropriate fork structures that can occur when either the leading or lagging strand synthesis is stalled. Thus, RecQ helicases integrate checkpoint activation and checkpoint response. ; GO: 0004003 ATP-dependent DNA helicase activity, 0006310 DNA recombination, 0009432 SOS response.

Probab=99.82 E-value=4.2e-18 Score=127.89 Aligned_cols=324 Identities=18% Similarity=0.242 Sum_probs=201.0 Q ss_pred CCCHHHHHHHHHHHHCCCEEEEECCCCCHHHHHHHHHHHHHHCCCCCEEEEECC-HHHHHHHHHHHHHHCCCCCCEEEEE Q ss_conf 874789999999996798099958899868999999999997599949999160-4656999999998558888159998 Q gi|255764515|r 2 NLAPHQTKIVDWILDHKRCAIWASMGSGKTVSVLTALSYIHLWGEKSVLVIAPL-RVAQSVWTSEVQRWSNFSHMNISVI 80 (458) Q Consensus 2 ~L~p~Q~~~v~~~~~~~~~ll~~~~G~GKT~~al~~~~~l~~~~~~~~LIv~P~-~l~~~~W~~Ei~kf~~~~~~~~~~~ 80 (458) T Consensus 13 ~FR~gQe~II~~vL~g~~~l~vmPTGGGKSlC--YQ~PALll~G--lt~VISPLIsLMkDQ-Vd~L~~----~Gv~Aa~l 83 (607) T TIGR01389 13 DFRGGQEEIIEHVLDGRDVLVVMPTGGGKSLC--YQVPALLLKG--LTVVISPLISLMKDQ-VDQLRA----AGVAAAYL 83 (607) T ss_pred CCCCHHHHHHHHHHCCCCEEEECCCCCCHHHH--HHHHHHHHCC--CEEEECCHHHHHHHH-HHHHHH----CCCEEEEE T ss_conf 67731589999984779858973899851277--7217887289--879984236314779-999986----07014520 Q ss_pred EC--CHHHHHHHHC----CCCCEEEECCCCHHH-HHHHCCCCCCCCEEECCCCCCCCCCC--CCCHHHHHHHHHHHHHCC Q ss_conf 58--9789888730----779869980642023-34420001132204404531002465--431156777766543059 Q gi|255764515|r 81 TG--TVKQRTKVLK----TPAVLYVINFENLGW-LVQELKGTWPFATIVVDESTKLKSFR--LRQGSKTARALAKPAWES 151 (458) Q Consensus 81 ~g--~~~~r~~~~~----~~~~i~i~s~e~~~~-~~~~~~~~~~~~~iIiDEaH~lkn~~--~~~~s~~~~~l~~~~~~~ 151 (458) T Consensus 84 NSt~s~~E~~~i~~~~~~G~~~LLYvAPERL~~~~Fl~~L~~~~i~L~AvDEAHCvSQWGHDFRPeY~~L~~l~~~fp~~ 163 (607) T TIGR01389 84 NSTLSAKEQQEIEKALVNGELKLLYVAPERLEQDYFLNMLKRLTIALLAVDEAHCVSQWGHDFRPEYRRLGELAERFPQV 163 (607) T ss_pred CCCCCHHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHCCCC T ss_conf 37788889999999984198157751671321189998873199308998325021668888756589999999867898 Q ss_pred CEEEEECCCCHHHHCCCHHHHHHHCCCCCCCCCCHHHHHHHHCCHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHC Q ss_conf 80799658402310010134677517888775327788777369564033000024555545589999974245433200 Q gi|255764515|r 152 ERFIELTGTPSPNGLIDLWGQIWFLDKGKRLGRVFQSFVARWFNTTQIGSHIGAVRYTAKETAQKEIEAQLSDCCLSLDI 231 (458) Q Consensus 152 ~~~l~LTgTPi~n~~~el~~ll~~l~~~~~l~~~~~~f~~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~~~~~~~ 231 (458) T Consensus 164 P~~iALTATAd~~t~~DI~~~L~L~~~~~--------f~~SF-------------------------------------- 197 (607) T TIGR01389 164 PTRIALTATADAETRQDIVELLRLKDANE--------FISSF-------------------------------------- 197 (607) T ss_pred CEEEEEECCCCHHHHHHHHHHCCCCCCCC--------CCCCC-------------------------------------- T ss_conf 66998724899878999999708898654--------12567-------------------------------------- Q ss_pred CCCCCCCCCCEEEEEEECCHHHHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHCCCCCCCC Q ss_conf 00100100110003452453689988899999985103345202234788887542035410002234300013433332 Q gi|255764515|r 232 ADYQNIDKPILITKKVPLPQPVMKQYHKFQRELYCDLQGENIEAFNSASKTVKCLQLANGAVYYDEEKHWKEVHDEKIKA 311 (458) Q Consensus 232 ~~~~~l~~~~~~~~~v~l~~~~~~~y~~~~~~~~~~~~~~~~~~~~~~~~~~~l~q~~~~~~~~~~~~~~~~~~~~k~~~ 311 (458) T Consensus 198 ------dRpNl-------------~~~-------------------------------------------v~~k~n~~~~ 215 (607) T TIGR01389 198 ------DRPNL-------------RFS-------------------------------------------VVKKNNKKKF 215 (607) T ss_pred ------CCHHH-------------HHH-------------------------------------------HHHHCCCCHH T ss_conf ------75114-------------334-------------------------------------------3120378136 Q ss_pred HHHHHHCC-CCCEEEEHHHHHHHHHHHHHC----------CCCCCCHHHHHHHHHHHCCCCCCEEEEEHHHCCCCCCCCC Q ss_conf 56654124-884034222367888664100----------0265334458998764245885589984422111622001 Q gi|255764515|r 312 LEVIIEKA-NAAPIIVAYHFNSDLARLQKA----------FPQGRTLDKDPCTIQEWNEGKIPLLFAHPASCGHGLNLQY 380 (458) Q Consensus 312 l~~il~~~-~~~kviif~~~~~~~~~i~~~----------~~~g~~~~~r~~~i~~f~~~~~~vli~s~~~~~~GlnL~~ 380 (458) T Consensus 216 l~~yl~~~~~G~SGIIYa~sR~~VE~~~~~L~s~G~~A~~YHAGL~~~~R~e~Q~~Fl~d~~~vmVAT-~AFGMGIdK-p 293 (607) T TIGR01389 216 LLEYLKKHREGQSGIIYASSRKKVEELAERLESQGISALAYHAGLSNKVRAENQEDFLYDDVKVMVAT-NAFGMGIDK-P 293 (607) T ss_pred HHHHHHCCCCCCCEEEECCCHHHHHHHHHHHHHCCCCEEECCCCCCHHHHHHHHHHHHHHCCEEEEEE-ECCCCCCCC-C T ss_conf 89997507999534787677045899999997479620403679877689999754446255488887-123587478-7 Q ss_pred CCCEEEEECCCCCHHHHHHHHHHHHCCCCHHCCCCCCEEEEE-E---------EECCCHHHHHHHHHHHHHHHHHHHHH Q ss_conf 785999908998986864456666202202037877528999-9---------85899689999999999999999985 Q gi|255764515|r 381 GGNILVFFSLWWDLEEHQQMIERIGVTRQRQAGFKRAVFVYY-L---------IAQNTIDELVLQRLRTKSTIQDLLLN 449 (458) Q Consensus 381 a~~~iI~~~~~wn~~~~~Q~~gRi~~~r~hR~Gq~~~v~v~~-l---------i~~~tide~i~~~~~~K~~~~~~~~~ 449 (458) T Consensus 294 nVRFViH~d~P~~~EsYYQE~GRA-----GRDGlpae~~lly~~~D~~l~~~~I~~s~~~~~~K~~e~~KL~~m~~y~~ 367 (607) T TIGR01389 294 NVRFVIHADMPKNIESYYQEAGRA-----GRDGLPAEAILLYSLADIALLKRFIEQSEADEDRKQIEREKLDAMLAYCE 367 (607) T ss_pred CCCEEEEECCCCCHHHHHCCCCCC-----CCCCCHHHHHHHCCHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHH T ss_conf 654888636874211131035546-----88752677867247778999999974158848899999999999999887

HHsearch alignment for GI: 255764515 and conserved domain: TIGR01389