>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=99.59 E-value=3.9e-13 Score=116.89 Aligned_cols=319 Identities=17% Similarity=0.224 Sum_probs=214.7 Q ss_pred ECCCCCCCHHHHHHHHHHHHHCCCCEEEEEEECCCCHHHHHHHHHHH-CCCCEEEEECCHHHHHHHHHHHHHHCCCCEEE Q ss_conf 18888884389999999988739733799863376469999999997-19978999316346899999999867898389 Q gi|254780991|r 145 TDYHPSGDQPAAIAQLLKGIHSREKVQLLLGVTGSGKTFTMAKVIEA-MQRPAIVMAPNKILAAQLYSEFKNFFPHNAVE 223 (805) Q Consensus 145 ~~~~P~gdQ~~Ai~~L~~~l~~g~~~qlL~GVTGSGKTevya~lI~~-~gr~aLvLvPei~La~QL~~rfk~~Fp~n~V~ 223 (805) T Consensus 12 ~~FR~g--Qe~II~~vL~----g-~~~l~vmPTGGGKSlCY-Q~PALll~Glt~VISPLIsLMkDQVd~L~~-~Gv~A-a 81 (607) T TIGR01389 12 DDFRGG--QEEIIEHVLD----G-RDVLVVMPTGGGKSLCY-QVPALLLKGLTVVISPLISLMKDQVDQLRA-AGVAA-A 81 (607) T ss_pred CCCCCH--HHHHHHHHHC----C-CCEEEECCCCCCHHHHH-HHHHHHHCCCEEEECCHHHHHHHHHHHHHH-CCCEE-E T ss_conf 767731--5899999847----7-98589738998512777-217887289879984236314779999986-07014-5 Q ss_pred EEEECCCCCCCCCCCCCCCCCHHHHCCCCHHHHHHHHHHHHHHHCCCCEEE-ECC---HHHHCCCCCHHHHHCCEEEEEC Q ss_conf 986213444421015554321022103588999999999999854998499-827---7896168983477225799941 Q gi|254780991|r 224 YFVSYYDYYQPEAYVPRTDTYIEKESSINEQIDRMRHSATRSLLERNDCIV-VSS---VSCIYGIGSVESYSQMIVQLKI 299 (805) Q Consensus 224 ~f~S~~~~yqpEay~p~~d~~i~k~~s~n~~i~~~R~~a~~~l~~~~~~IV-Vgs---rSAIfgl~~P~~~lglIIvdEe 299 (805) T Consensus 82 ~l----------------------NSt~s---~~E~~~i~~~~~~G~~~LLYvAPERL~~~~Fl~~L~~~~i~L~AvDEA 136 (607) T TIGR01389 82 YL----------------------NSTLS---AKEQQEIEKALVNGELKLLYVAPERLEQDYFLNMLKRLTIALLAVDEA 136 (607) T ss_pred EE----------------------CCCCC---HHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHCCCCEEEEEECC T ss_conf 20----------------------37788---889999999984198157751671321189998873199308998325 Q ss_pred CCCCCHHHHHHHHHHCCCCCCHHHHHHHHHCCCCEEE-ECCCCCHHHHHHHHCCCCCCHHHHHCCCCCCCCHHHHCCCCC Q ss_conf 9811178753234311765633877545331872478-317888778887310444200222101666400111000010 Q gi|254780991|r 300 GDSVEQKELLSSLVKQQYKRQDIGIIRGTFRVCGDSI-EIFPSHLEDVAWRVSMFGNDIEEISEFYPLTGQKIRNVETIK 378 (805) Q Consensus 300 hd~~~~~~~~~~l~~~~Y~R~D~a~~RG~f~~rg~IL-dsatps~Es~~~Rie~f~deIe~I~~fDplT~~~~~~~~~~~ 378 (805) T Consensus 137 HCvSQWGHDFRPe----Y~~--L~~l~~~fp~~P~~iALTATAd~~t~~------------------------DI~~~L~ 186 (607) T TIGR01389 137 HCVSQWGHDFRPE----YRR--LGELAERFPQVPTRIALTATADAETRQ------------------------DIVELLR 186 (607) T ss_pred CCCCCCCCCCCHH----HHH--HHHHHHHCCCCCEEEEEECCCCHHHHH------------------------HHHHHCC T ss_conf 0216688887565----899--999998678986699872489987899------------------------9999708 Q ss_pred CHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCHHHHHHCCCCCCCCC Q ss_conf 00000002563678875455899899899887544332110012444477775332112014510113331144655562 Q gi|254780991|r 379 IYANSHYVTPRPTLNTAMKYIKEELKMRLIELEKEGRLLEAQRLEQRITYDLEMLETTGSCQSIENYSRYLTGRNPGEPP 458 (805) Q Consensus 379 i~Pa~~~v~~~e~l~~a~~~i~~el~~rl~~~~~~~~~~ea~rL~qR~~~dle~l~e~G~~~gienyS~~L~~r~~ge~P 458 (805) T Consensus 187 L~~~~~f~~SFdRpNl~~~v~----------------------------------------------------------- 207 (607) T TIGR01389 187 LKDANEFISSFDRPNLRFSVV----------------------------------------------------------- 207 (607) T ss_pred CCCCCCCCCCCCCHHHHHHHH----------------------------------------------------------- T ss_conf 898654125677511433431----------------------------------------------------------- Q ss_pred HHHHHCCCCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHCCCCCCCCCCCCCCCCH Q ss_conf 02330265442132101234475445432456541333235766554443222111010012155545444686754201 Q gi|254780991|r 459 PTLFEYIPEDSLLFVDESHVTIPQISGMYRGDFHRKATLAEYGFRLPSCMDNRPLRFEEWNCLRPTTIVVSATPGSWELE 538 (805) Q Consensus 459 ~tL~dY~p~d~ll~idesh~~~pqi~~~~~~d~~RK~~l~~~gfrlp~~~~n~pl~f~e~~~~~~~~~~~satPg~~e~e 538 (805) T Consensus 208 -------------------------------------------------------------------------------- 207 (607) T TIGR01389 208 -------------------------------------------------------------------------------- 207 (607) T ss_pred -------------------------------------------------------------------------------- T ss_conf -------------------------------------------------------------------------------- Q ss_pred HHHHHHHHHHHCCCCCCCCCCEECCCCCHHHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHHHCCCEEEECCCCCCH Q ss_conf 32200234320124467720000133101688999999863023212466214789999999986359668732576457 Q gi|254780991|r 539 QCQGIIVEQIIRPTGLVDPPVEIRSARTQVEDVYDEINLAAQQGLRILLTVLTKRMAEDLTEYLYERNIRVRYMHSEVKT 618 (805) Q Consensus 539 ~~~~~~~eqi~rptg~idp~ieir~~~~qvddl~~ei~~~~~~~~R~l~~~~tkr~~e~l~~~~~~~~i~~~~~h~~~~~ 618 (805) T Consensus 208 ------------------------~k~n~~~~l~~yl~~~~~-G~SGIIYa~sR~~VE~~~~~L~s~G~~A~~YHAGL~~ 262 (607) T TIGR01389 208 ------------------------KKNNKKKFLLEYLKKHRE-GQSGIIYASSRKKVEELAERLESQGISALAYHAGLSN 262 (607) T ss_pred ------------------------HHCCCCHHHHHHHHCCCC-CCCEEEECCCHHHHHHHHHHHHHCCCCEEECCCCCCH T ss_conf ------------------------203781368999750799-9534787677045899999997479620403679877 Q ss_pred HHHHHHHHHHHCCCCCEEEEHHHHHCCCCCCCCCEEEEECCCCCCCCCCHHHHHHHHHHHCC-CCCCEEEEEECCCCHHH Q ss_conf 89999999973189869998458753578777117999628856744460137766543127-99866999824898899 Q gi|254780991|r 619 LERIEIIRDLRLGKFDVLVGINLLREGLDIPECGLVAILDADKEGFLRSKTSLIQTIGRAAR-NVNSKVILYADTITKSI 697 (805) Q Consensus 619 ~~r~~il~~~~~g~~diLvgt~~~akGlD~p~v~lV~i~dAD~~~f~~~~~~~~q~~GRagR-~~~G~~il~ad~~t~~~ 697 (805) T Consensus 263 ~~R~e~Q~~Fl~d~~~vmVAT~AFGMGIdKpnVRFViH~d-----~P~~~EsYYQE~GRAGRDGlpae~~lly~~~D~~l 337 (607) T TIGR01389 263 KVRAENQEDFLYDDVKVMVATNAFGMGIDKPNVRFVIHAD-----MPKNIESYYQEAGRAGRDGLPAEAILLYSLADIAL 337 (607) T ss_pred HHHHHHHHHHHHHCCEEEEEEECCCCCCCCCCCCEEEEEC-----CCCCHHHHHCCCCCCCCCCCHHHHHHHCCHHHHHH T ss_conf 6899997544462554888871235874787654888636-----87421113103554688752677867247778999

HHsearch alignment for GI: 254780991 and conserved domain: TIGR01389