>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=100.00 E-value=2.4e-43 Score=310.67 Aligned_cols=358 Identities=22% Similarity=0.328 Sum_probs=281.1 Q ss_pred HCCCCCCCHHHHHHHHHHHCCCCEEEECCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCEEEEECCCHHH-HHHHHHHHH Q ss_conf 7879878989999999997599699992898746899999999986104212255688279998499899-999999999 Q gi|254780601|r 17 ERGYVNLTSVQEAILNPDLREKDVLVSAQTGSGKTVAFGLALASTLLAENDRFSPASAPLALAIAPTREL-AVQVGRELE 95 (573) Q Consensus 17 ~~g~~~pt~iQ~~~ip~~l~g~d~i~~a~TGsGKT~af~lp~l~~l~~~~~~~~~~~~~~~lil~PTrEL-a~Qv~~~~~ 95 (573) T Consensus 8 ~FGY~~FR~gQe~II~~vL~g~~~l~vmPTGGGKSlCYQ~PALll--~G----------lt~VISPLIsLMkDQVd---- 71 (607) T TIGR01389 8 TFGYDDFRGGQEEIIEHVLDGRDVLVVMPTGGGKSLCYQVPALLL--KG----------LTVVISPLISLMKDQVD---- 71 (607) T ss_pred HCCCCCCCCHHHHHHHHHHCCCCEEEECCCCCCHHHHHHHHHHHH--CC----------CEEEECCHHHHHHHHHH---- T ss_conf 468776773158999998477985897389985127772178872--89----------87998423631477999---- Q ss_pred HHHHHCCCEEEEEECCCCHHHHHHH---HCC-CCEEEEECCCCHHHHHHCCCCCCCCCEEEEEECCCCCCCCH--HHHHH Q ss_conf 9854469879999889987999996---128-97599822310133210001224643189996131100100--12357 Q gi|254780601|r 96 WLYAKTGVVVAVCIGGVSVHRERRD---LQN-GAHIVVGTPGRLCDHIRGKGLNISHLKAVVLDEADEMLDLG--FRDDI 169 (573) Q Consensus 96 ~l~~~~~~~v~~~~gg~~~~~q~~~---l~~-~~~iiv~TPgrl~d~~~~~~l~l~~v~~lVlDEaD~ml~~g--f~~~i 169 (573) T Consensus 72 ~L-~~~Gv~Aa~lNSt~s~~E~~~i~~~~~~G~~~LLYvAPERL~~~~Fl~~L~~~~i~L~AvDEAHCvSQWGHDFRPeY 150 (607) T TIGR01389 72 QL-RAAGVAAAYLNSTLSAKEQQEIEKALVNGELKLLYVAPERLEQDYFLNMLKRLTIALLAVDEAHCVSQWGHDFRPEY 150 (607) T ss_pred HH-HHCCCEEEEECCCCCHHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCCCCCCHHH T ss_conf 99-86070145203778888999999998419815775167132118999887319930899832502166888875658 Q ss_pred HHH---HHHCCCCCCEEEEECCCCCCCHH-HHHHH-CCCCCCCCCCCCCCCCCCCCHHCCCCCCCHHHHHHHHCCCCCCC Q ss_conf 888---75214334225631111222001-11121-01233332333232566520000000000024554200102356 Q gi|254780601|r 170 EFI---LDSSPKKRRMLMFSATISPAITT-LAKNY-QKDAVRVNIASENRQHSDIDYRAVLVALSDRDNAIVNILRYHGA 244 (573) Q Consensus 170 ~~i---~~~~p~~~q~~l~SAT~~~~i~~-l~~~~-~~~p~~i~~~~~~~~~~~i~~~~~~v~~~~k~~~l~~ll~~~~~ 244 (573) T Consensus 151 ~~L~~l~~~fp~~P~~iALTATAd~~t~~DI~~~L~L~~~~~f~-~SFdR--pNl--~~~v~~k~n~~~~l~~yl~~~~~ 225 (607) T TIGR01389 151 RRLGELAERFPQVPTRIALTATADAETRQDIVELLRLKDANEFI-SSFDR--PNL--RFSVVKKNNKKKFLLEYLKKHRE 225 (607) T ss_pred HHHHHHHHHCCCCCEEEEEECCCCHHHHHHHHHHCCCCCCCCCC-CCCCC--HHH--HHHHHHHCCCCHHHHHHHHCCCC T ss_conf 99999998678986699872489987899999970889865412-56775--114--33431203781368999750799 Q ss_pred -CEEEEECCCHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHCCCEEEEEECCCCCCCCCCCCCCEEEEECCCC Q ss_conf -4167751302334565555542266630104899999999998665448814998538650014578873389705887 Q gi|254780601|r 245 -KNAIVFCSTRASVSRFTKVLAEHLFQVVALSGELSQQERSNALQMMRDGRARVCIATDVAARGIDLPDLELVIHAELSS 323 (573) Q Consensus 245 -~~~ivF~~t~~~~~~l~~~L~~~g~~~~~lhg~~~q~~R~~~~~~fr~g~~~vLV~TDvaaRGiDi~~v~~Vin~d~P~ 323 (573) T Consensus 226 G~SGIIYa~sR~~VE~~~~~L~s~G~~A~~YHAGL~~~~R~e~Q~~Fl~d~~~vmVAT~AFGMGIdKpnVRFViH~d~P~ 305 (607) T TIGR01389 226 GQSGIIYASSRKKVEELAERLESQGISALAYHAGLSNKVRAENQEDFLYDDVKVMVATNAFGMGIDKPNVRFVIHADMPK 305 (607) T ss_pred CCCEEEECCCHHHHHHHHHHHHHCCCCEEECCCCCCHHHHHHHHHHHHHHCCEEEEEEECCCCCCCCCCCCEEEEECCCC T ss_conf 95347876770458999999974796204036798776899997544462554888871235874787654888636874 Q ss_pred CHHHHHHHHCCCCCCCCCCEEEEEECHHHHHHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCCCHHHHHH Q ss_conf 47899986030103788860256405999999999999850664105689999988889986554431012220455776 Q gi|254780601|r 324 NPENLLHRSGRTGRAGRKGMSVFVIPQNMQRRAERLFREANVSVVWEPAPSVEAIRERDAQRILQDPLFLDSIQGDEKKM 403 (573) Q Consensus 324 ~~~~yvHR~GRtgRag~~G~ai~l~~~~e~~~~~~i~~~~~~~~~~~~~Ps~eeI~~~~~~~l~~~~~~~~~~~~~~~~~ 403 (573) T Consensus 306 ~~EsYYQE~GRAGRDGlpae~~lly~~~D~~l~~~~I~~s~~~~------~~K~~e~~KL~~m~~---y~~~~~Cr~~~~ 376 (607) T TIGR01389 306 NIESYYQEAGRAGRDGLPAEAILLYSLADIALLKRFIEQSEADE------DRKQIEREKLDAMLA---YCETQTCRRALI 376 (607) T ss_pred CHHHHHCCCCCCCCCCCHHHHHHHCCHHHHHHHHHHHHCCCCCH------HHHHHHHHHHHHHHH---HHHHHHHHHHHH T ss_conf 21113103554688752677867247778999999974158848------899999999999999---887899999998 Q ss_pred HH Q ss_conf 66 Q gi|254780601|r 404 VD 405 (573) Q Consensus 404 ~e 405 (573) T Consensus 377 l~ 378 (607) T TIGR01389 377 LR 378 (607) T ss_pred HH T ss_conf 86

HHsearch alignment for GI: 254780601 and conserved domain: TIGR01389