>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=98.79 E-value=3e-07 Score=76.45 Aligned_cols=300 Identities=20% Similarity=0.289 Sum_probs=214.5 Q ss_pred CHHHHHHHHHHHHHHCCCCCCEEEEEECCCCCHHHHHHHHHHHHHHHHCCEEEEEHHHH-HHHHHHHHHHHHCCCCCCEE Q ss_conf 98899999999984100134307886214422369999997334443054588612799-99999986211014578658 Q gi|254780945|r 274 TKSQESAIKDILQDMSQKNRMLRILQGDVGSGKTLVALIAMAAAVEAGGQAVIMAPIGI-LAQQHYEFIKKYTQNTQIIV 352 (700) Q Consensus 274 T~~Q~~ai~eI~~Dl~~~~pM~RLLQGDVGSGKTiVA~~A~l~~~~~G~Q~alMaPTEI-LA~QH~~~~~~~~~~~~i~v 352 (700) T Consensus 15 R~gQe~II~~vL~g~~~l~vm------PTGGGKSlCYQ~PALll---~Glt~VISP-LIsLMkDQVd~L~~~----Gv~A 80 (607) T TIGR01389 15 RGGQEEIIEHVLDGRDVLVVM------PTGGGKSLCYQVPALLL---KGLTVVISP-LISLMKDQVDQLRAA----GVAA 80 (607) T ss_pred CCHHHHHHHHHHCCCCEEEEC------CCCCCHHHHHHHHHHHH---CCCEEEECC-HHHHHHHHHHHHHHC----CCEE T ss_conf 731589999984779858973------89985127772178872---898799842-363147799999860----7014 Q ss_pred EEEECCCCHHHHHHHHHHHCCCCCEEE-EEC----HHHCCCCCCCCCCCEEEECCCCC-------CCHHHHH--HHHHC- Q ss_conf 996246422566768776213475486-411----12013345544441788521013-------3568899--87402- Q gi|254780945|r 353 EIITGNMPQAHRRKALERIAHGQAHII-IGT----HALFQDSIQYYKLILVIVDEQHR-------FGVQQRL--KLTQK- 417 (700) Q Consensus 353 ~lLtg~~~~~er~~i~~~i~~G~~~ii-IGT----HAL~q~~v~F~~LgLvViDEQHR-------FGV~QR~--~L~~K- 417 (700) T Consensus 81 a~lNSt~s~~E~~~i~~~~~~G~~~LLYvAPERL~~~~Fl~~L~~~~i~L~AvDEAHCvSQWGHDFRPeY~~L~~l~~~f 160 (607) T TIGR01389 81 AYLNSTLSAKEQQEIEKALVNGELKLLYVAPERLEQDYFLNMLKRLTIALLAVDEAHCVSQWGHDFRPEYRRLGELAERF 160 (607) T ss_pred EEECCCCCHHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHC T ss_conf 52037788889999999984198157751671321189998873199308998325021668888756589999999867 Q ss_pred CCCCCCEEECHHHHHHHHHHHHHHCCCHHHHCCC--CCCCCCCEEEEEECC-CHHHHHHHHHHHHCCCCEEEEEECCCCC Q ss_conf 5677610101013227899997520101111023--557666207999702-0026899997631038738999712012 Q gi|254780945|r 418 ATAPHVLLMTATPIPRTLVLTSLGDIDISKITEK--PAGRKPIKTVIIPIN-RIDEVIERLKVVLSEGKKAYWICPQIEE 494 (700) Q Consensus 418 g~~ph~L~MtATPIPRTLal~~ygdldvS~i~e~--P~gR~~I~T~~~~~~-~~~~~~~~i~~~l~~g~q~y~VcPlIee 494 (700) T Consensus 161 p~~P~~iALTATAd~~t~~DI~-~~L~L~~~~~f~~SFdRpNl~~~v~~k~n~~~~l~~yl~~~~~--G~SGIIYa~--- 234 (607) T TIGR01389 161 PQVPTRIALTATADAETRQDIV-ELLRLKDANEFISSFDRPNLRFSVVKKNNKKKFLLEYLKKHRE--GQSGIIYAS--- 234 (607) T ss_pred CCCCEEEEEECCCCHHHHHHHH-HHCCCCCCCCCCCCCCCHHHHHHHHHHCCCCHHHHHHHHCCCC--CCCEEEECC--- T ss_conf 8986699872489987899999-9708898654125677511433431203781368999750799--953478767--- Q ss_pred CCCCCCCHHHHHHHHHHHHCCCCEECCCCCCCHHHHHHHHHHHHCCCEEEEEECHHHHCCCCCCCCCEEEEECHHHCCHH Q ss_conf 21112101466666668663710312014699899999999975598699998003410468887658998585254746 Q gi|254780945|r 495 KKESNFRSVVERFNSLHEHFTSSIAIIHGRMSDIDKESVMDSFKNGTCKLLIATTVIEVGIDVVDASIIIIENAEHFGLA 574 (700) Q Consensus 495 se~~~~~~~~~~~~~l~~~~~~~v~~lHGkm~~~ek~~~m~~F~~g~~~iLvaTtviEVGvdvpna~~mvI~~aerfGLs 574 (700) T Consensus 235 ----sR~~VE~~~~~L~s~-G~~A~~YHAGL~~~~R~e~Q~~Fl~d~~~vmVAT~AFGMGIdKpnVRFViH~d~P~-~~E 308 (607) T TIGR01389 235 ----SRKKVEELAERLESQ-GISALAYHAGLSNKVRAENQEDFLYDDVKVMVATNAFGMGIDKPNVRFVIHADMPK-NIE 308 (607) T ss_pred ----CHHHHHHHHHHHHHC-CCCEEECCCCCCHHHHHHHHHHHHHHCCEEEEEEECCCCCCCCCCCCEEEEECCCC-CHH T ss_conf ----704589999999747-96204036798776899997544462554888871235874787654888636874-211 Q ss_pred HHHHHHHCCCCCCCCEEEEEEECCC Q ss_conf 8877301166789835999970888 Q gi|254780945|r 575 QLHQLRGRVGRGEEISSCILLYHPP 599 (700) Q Consensus 575 qLHQLRGRVGRg~~~s~c~l~~~~~ 599 (700) T Consensus 309 sYYQE~GRAGRDGlpae~~lly~~~ 333 (607) T TIGR01389 309 SYYQEAGRAGRDGLPAEAILLYSLA 333 (607) T ss_pred HHHCCCCCCCCCCCHHHHHHHCCHH T ss_conf 1310355468875267786724777

HHsearch alignment for GI: 254780945 and conserved domain: TIGR01389