>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=98.73 E-value=2.8e-06 Score=67.16 Aligned_cols=336 Identities=19% Similarity=0.292 Sum_probs=204.1 Q ss_pred CCHHHHHHHHHHHHHHCCCCCEEEEECCCCHHHHHHHHHHHHHHHHCCCCEEEEECCCHHHHHHHHHHHCCCCCEEEEEE Q ss_conf 88378999999987520489619984475315799999999998514684799715210013445554303897689962 Q gi|254780619|r 199 LDKNQQDVVEQVVPLCTKGFAVSLISGVTGSGKTEVYLEIVAAVLHLGKQVLILLPEISLTSAILERFQKRFGVKPAEWH 278 (731) Q Consensus 199 Lt~eQ~~a~~~i~~~~~~~f~~~LL~GvTGSGKTEVYl~li~~~L~~GkqvLiLvPEI~Lt~Q~~~rl~~rF~~~v~v~H 278 (731) T Consensus 14 FR~gQe~II~~vL~g~~---~l~vmP--TGGGKSlCY-Q~--PALll~Glt~VISPLIsLMkDQVd~L~~~-Gv~Aa~lN 84 (607) T TIGR01389 14 FRGGQEEIIEHVLDGRD---VLVVMP--TGGGKSLCY-QV--PALLLKGLTVVISPLISLMKDQVDQLRAA-GVAAAYLN 84 (607) T ss_pred CCCHHHHHHHHHHCCCC---EEEECC--CCCCHHHHH-HH--HHHHHCCCEEEECCHHHHHHHHHHHHHHC-CCEEEEEC T ss_conf 77315899999847798---589738--998512777-21--78872898799842363147799999860-70145203 Q ss_pred CCCCCHHHHHHHHHHHCCCCEEE-EEC-C--HHHHH---HHCCCEEEEEEECCCCCCHHCCC-CCCCHHHHHHHHHHHCC Q ss_conf 35572356678999971997399-940-0--12110---01000136774055321000024-43224899999751103 Q gi|254780619|r 279 SSLSTSMREKIWRQVARGAISVI-VGV-R--SALFL---PFKKLGLIVIDEEHDISYKQEEG-ILYNARDMSIVRGKIES 350 (731) Q Consensus 279 S~ls~~eR~~~w~~i~~G~~~IV-IGt-R--SAif~---P~~nLglIIvDEEHd~sykq~~~-pry~aRdvA~~Ra~~~~ 350 (731) T Consensus 85 St~s~~E~~~i~~~~~~G~~~LLYvAPERL~~~~Fl~~L~~~~i~L~AvDEAHCvS--QWGHDFRPeY~~L~~l~~~fp~ 162 (607) T TIGR01389 85 STLSAKEQQEIEKALVNGELKLLYVAPERLEQDYFLNMLKRLTIALLAVDEAHCVS--QWGHDFRPEYRRLGELAERFPQ 162 (607) T ss_pred CCCCHHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHCCCCEEEEEECCCCCC--CCCCCCCHHHHHHHHHHHHCCC T ss_conf 77888899999999841981577516713211899988731993089983250216--6888875658999999986789 Q ss_pred CCEECC-CCCCCHHHHHHHHHHHHHHHCCCCC---CCCCCCCCCEECCCCCCCCCCCCCCCHHHHHHHHHHHCCCCEEEE Q ss_conf 210000-2454324677532123444124322---367654332110222233222454798999999886226551799 Q gi|254780619|r 351 FPVVLV-SATPSIESRVNGISRRYHSVHLSTR---YRNSALPHLQVIDMRGQTIAQGKSLSPEMIDGIRHTLARNEQTLL 426 (731) Q Consensus 351 ~~lilg-SATPSles~~~~~~g~~~~~~l~~R---~~~~~~P~i~ivDm~~~~~~~~~~lS~~l~~~i~~~l~~g~qvll 426 (731) T Consensus 163 ~P~~iALTATAd~~t~~DI~----~~L~L~~~~~f~~SFdRpNl~~~v~~k~n------~~~~l~~yl~----------- 221 (607) T TIGR01389 163 VPTRIALTATADAETRQDIV----ELLRLKDANEFISSFDRPNLRFSVVKKNN------KKKFLLEYLK----------- 221 (607) T ss_pred CCEEEEEECCCCHHHHHHHH----HHCCCCCCCCCCCCCCCHHHHHHHHHHCC------CCHHHHHHHH----------- T ss_conf 86699872489987899999----97088986541256775114334312037------8136899975----------- Q ss_pred EECCCCEEHHCCCCCCCCCCCCCCCCCEEEEECCCCCCEECHHHCCCCCCCCCCCCCCCCEECCCCCCHHHHHHHHHHCC Q ss_conf 74222000000235654343101465201211357832000021024465556667874110013542899888852048 Q gi|254780619|r 427 FLNRRGYAPLTLCQVCGNRLKCLHCSCWLVEHRSKKKLYCHQCGHSAIYSQSCVVCGSSGKMIACGFGIERIAEEVCEYF 506 (731) Q Consensus 427 ~lnRrGya~~~~C~~Cg~~~~C~~C~~~l~~h~~~~~l~Ch~Cg~~~~~~~~Cp~Cg~~~~l~~~G~Gte~~~e~l~~~f 506 (731) T Consensus 222 -~~~~G~SGIIYa-------------------------------------------~sR-------~~VE~~~~~L~s~- 249 (607) T TIGR01389 222 -KHREGQSGIIYA-------------------------------------------SSR-------KKVEELAERLESQ- 249 (607) T ss_pred -CCCCCCCEEEEC-------------------------------------------CCH-------HHHHHHHHHHHHC- T ss_conf -079995347876-------------------------------------------770-------4589999999747- Q ss_pred CCCHHHHCCCCCCCCHHHHHHHHHHHCCCCCCEEEEEHHHCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 52000102321135867899999862125765798704430231134520123300034431024557899999875431 Q gi|254780619|r 507 PLARISILSSDLEGGGGRLQLQLSAIAKGEIDIIIGTQLVAKGHNFPRMSLVGVVDGDLGLTNADLRSSERTFQLLSQVT 586 (731) Q Consensus 507 p~~~v~~~d~d~~~~~~~~~~~~~~~~~~~~~ilvgTq~i~kg~~fp~v~lv~il~aD~~l~~pd~ra~E~~~qll~qv~ 586 (731) T Consensus 250 -G~~A~~YHAGL--~~~~R~e~Q~~Fl~d~~~vmVAT~AFGMGIdKpnVRFViH~d~------P--~~~EsY----YQE~ 314 (607) T TIGR01389 250 -GISALAYHAGL--SNKVRAENQEDFLYDDVKVMVATNAFGMGIDKPNVRFVIHADM------P--KNIESY----YQEA 314 (607) T ss_pred -CCCEEECCCCC--CHHHHHHHHHHHHHHCCEEEEEEECCCCCCCCCCCCEEEEECC------C--CCHHHH----HCCC T ss_conf -96204036798--7768999975444625548888712358747876548886368------7--421113----1035 Q ss_pred HCCCCCCCCCEEEEEECCCC-CHHHHHHHHCCHHHHHHHHHHHHHHCCC Q ss_conf 10256678868999932986-4888999958979999999999998188 Q gi|254780619|r 587 GRAGRFGLKSLGLIQAYQPT-HPVMQALVSGDADSFYESEIRARESVNL 634 (731) Q Consensus 587 gRagr~~~~g~v~iQt~~p~-~~~~~~~~~~d~~~f~~~el~~R~~~~~ 634 (731) T Consensus 315 GRAGRDGlpae~~ll-y~~~D~~l~~~~I~~s~~~~~~K~~e~~KL~~m 362 (607) T TIGR01389 315 GRAGRDGLPAEAILL-YSLADIALLKRFIEQSEADEDRKQIEREKLDAM 362 (607) T ss_pred CCCCCCCCHHHHHHH-CCHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHH T ss_conf 546887526778672-477789999999741588488999999999999

HHsearch alignment for GI: 254780619 and conserved domain: TIGR01389