>TIGR01069 mutS2 MutS2 family protein; InterPro: IPR005747 Mismatch repair contributes to the overall fidelity of DNA replication and is essential for combating the adverse effects of damage to the genome. It involves the correction of mismatched base pairs that have been missed by the proofreading element of the DNA polymerase complex. The post-replicative Mismatch Repair System (MMRS) of Escherichia coli involves MutS (Mutator S), MutL and MutH proteins, and acts to correct point mutations or small insertion/deletion loops produced during DNA replication . MutS and MutL are involved in preventing recombination between partially homologous DNA sequences. The assembly of MMRS is initiated by MutS, which recognises and binds to mispaired nucleotides and allows further action of MutL and MutH to eliminate a portion of newly synthesized DNA strand containing the mispaired base . MutS can also collaborate with methyltransferases in the repair of O(6)-methylguanine damage, which would otherwise pair with thymine during replication to create an O(6)mG:T mismatch . MutS exists as a dimer, where the two monomers have different conformations and form a heterodimer at the structural level . Only one monomer recognises the mismatch specifically and has ADP bound. Non-specific major groove DNA-binding domains from both monomers embrace the DNA in a clamp-like structure. Mismatch binding induces ATP uptake and a conformational change in the MutS protein, resulting in a clamp that translocates on DNA. MutS is a modular protein with a complex structure , and is composed of: N-terminal mismatch-recognition domain, which is similar in structure to tRNA endonuclease. Connector domain, which is similar in structure to Holliday junction resolvase ruvC. Core domain, which is composed of two separate subdomains that join together to form a helical bundle; from within the core domain, two helices act as levers that extend towards (but do not touch) the DNA. Clamp domain, which is inserted between the two subdomains of the core domain at the top of the lever helices; the clamp domain has a beta-sheet structure. ATPase domain (connected to the core domain), which has a classical Walker A motif. HTH (helix-turn-helix) domain, which is involved in dimer contacts. Homologues of MutS have been found in many species including eukaryotes (MSH 1, 2, 3, 4, 5, and 6 proteins), archaea and bacteria, and together these proteins have been grouped into the MutS family. Although many of these proteins have similar activities to the E. coli MutS, there is significant diversity of function among the MutS family members. This diversity is even seen within species, where many species encode multiple MutS homologues with distinct functions . Inter-species homologues may have arisen through frequent ancient horizontal gene transfer of MutS (and MutL) from bacteria to archaea and eukaryotes via endosymbiotic ancestors of mitochondria and chloroplasts . This entry represents a family of MutS proteins.; GO: 0003684 damaged DNA binding, 0005524 ATP binding, 0045005 maintenance of fidelity during DNA-dependent DNA replication.

Probab=100.00 E-value=0 Score=529.08 Aligned_cols=495 Identities=22% Similarity=0.320 Sum_probs=400.5 Q ss_pred HHHHHCCCCCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHCCCHH-HHHHHHHHHHHHCCHHHHHHHHHHHH-HCHHH- Q ss_conf 7876301234337899998631002345678989999997402212-58899999752048344445677521-00002- Q gi|254780750|r 314 LLKTIDYSITGAGGRLFAERIASPLTDSTKINTRLDSINFFIQNPI-LINPIQKILKSSPDVPRSLSRLKIGR-GEPKD- 390 (920) Q Consensus 314 L~~~Ln~t~T~~G~RlLr~wL~~PL~d~~~I~~R~daVe~l~~~~~-~~~~l~~~L~~i~DleRll~ri~~~~-~~p~d- 390 (920) T Consensus 15 ~e~~~~~t~t~l~~~~~~~--L~p~~~~~e~~~~l~~~~~~~~I~~s~~~--n~~f~g~~DIr~~L~rae~~~~~~~le~ 90 (834) T TIGR01069 15 KENLLKYTATPLGKEKALE--LKPPKSVEESKELLEKLKALVSIENSLRS--NVRFKGLADIREALKRAELGGIVVGLEE 90 (834) T ss_pred HHHHHHHHCCHHHHHHHHH--CCCCCCHHHHHHHHHHHHHHHHHHHCCCC--CCCCCCCCCHHHHHHHHHHHHHHHHHHH T ss_conf 9887575138045899860--87954078999999988777778732012--6554442144668744456435676899 Q ss_pred HHHHHHHHHHHHHHHH----HHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCEECCC-CCCHHHHHH Q ss_conf 1206899999865567----54302584577876765776789999999998543101221046010168-541145579 Q gi|254780750|r 391 IAVIRDGIRSGINILN----LFLKNDLPEELRGAVEKLKKLPQSLEKTLSSMLSDDLPTFKRDGGFLRDG-ADASLDETR 465 (920) Q Consensus 391 l~~L~~sl~~~~~i~~----~l~~~~~~~~l~~~~~~l~~l~~~l~~~l~~~i~~~~~~~~~~~~~ik~g-~d~eLD~lr 465 (920) T Consensus 91 ~l~I~~~l~~~~~lk~fit~~~~~~~~~~~L~~~~~~~~~L~-~L~n~i~~~iD~--------~G~v~~~GAs~~L~~ir 161 (834) T TIGR01069 91 ILKIQNLLKKVKELKRFITRLAEERLDLEILSKLLLKLITLS-PLENDIIECIDD--------DGKVKDEGASEELDEIR 161 (834) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHCCCCC-HHHHHHHHHCCC--------CCCHHHHHCCHHHHHHH T ss_conf 999999999989999999999731244268999998424484-689999974285--------41004222046789999 Q ss_pred HHHHHHHHHHHHHHHHHHHHCC-CCCC--CCCCCCCCEEEEEECCHHHHHCCCCCCCCCCEEEEEECCCCHHHHHHH-HH Q ss_conf 9886389999977687788738-8751--102558622376204114333441116876527985212000111345-66 Q gi|254780750|r 466 SLRDQSKRIIASLQLKYAEETK-IKNL--KIKHNNNLGYFIEVTSSSASVLKKDLESKDRFIHRQTMSNLTRFTTLE-LI 541 (920) Q Consensus 466 ~~~~~~~~~l~~l~~~~~~~~~-i~sL--ki~~n~~~gy~iEV~~~~~~~i~~~~~~~~~~i~~qt~~~~~Rf~t~e-L~ 541 (920) T Consensus 162 ~~l~~l~~~~~~~l~~~i~~~~~a~~L~d~~vt~r~~r~vlp~K~~~~~~i~-------GiV~~~SsSG~T~Y~EPq~iv 234 (834) T TIGR01069 162 ESLKALEERVKKRLKKIIRSKELAKYLSDTIVTIRNDRYVLPLKSGFKGKIK-------GIVHDTSSSGETLYVEPQAIV 234 (834) T ss_pred HHHHHHHHHHHHHHHHHHCCHHHHHHHHCCCEEEECCEEEEEEECCCCCCCC-------CEEEECCCCCCCCEECHHHHH T ss_conf 9999999999999998734433455440022265267389866615300147-------616520587750101628999 Q ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCEECCCC---CCEEECCCC Q ss_conf 64334643777776433447888765430112579888899986778877888775258851210478---714000046 Q gi|254780750|r 542 DLENRITNATNSALLIELESFEILSNAIIEQSESLDNASQVIAIIDISIALAILAKEQNYCRPIIDNS---TNFIVKDGR 618 (920) Q Consensus 542 ~l~~~i~~~~~~~~~~e~~~~~~l~~~i~~~~~~l~~~~~~ia~lD~l~SlA~~a~~~~y~rP~i~~~---~~l~i~~gR 618 (920) T Consensus 235 ~~nnkL~~~~~~~~~~i~~iLr~Ls~~~~~~~~~L~~l~~~~~~lD~~~Ar~ry~~~~~~~fP~~~~tGd~k~~~L~~ar 314 (834) T TIGR01069 235 KLNNKLAQLKNEEEEEIEKILRTLSEKVQEYLLELKELFKEFLELDSLQARARYAKAVKAEFPEISNTGDEKVIELEEAR 314 (834) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCEEEHHHCC T ss_conf 99889999877888999999998889999999999999999988658999988778734726778988863112450177 Q ss_pred CHHHHHHHHHCCCCCEEEEEEEECCCCCCCCCEEEEEECCCCCCHHHHHHHHHHHHHHHHCCCCCCHH-H-CCCCCCCEE Q ss_conf 80588763102877044434563587777664399996778440789999999999999719853035-3-206822105 Q gi|254780750|r 619 HPIVEKTLKQQSSKPFIANDCDLSCPNDKNSGKLWLLTGPNMGGKSTFLRQNALIVIMAQMGSYVPAS-Y-AHIGIVDKL 696 (920) Q Consensus 619 HPviE~~l~~~~~~~fVpNdi~l~~~~~~~~~~~~iiTGpNmgGKSt~lRqval~vilAQiG~fVPA~-~-a~i~~~D~I 696 (920) T Consensus 315 HPlL~~~kE~eGGPavv~~~~~l~-----~~~~~~~iTGPNtGGKTVtLKTLGL~~lm~q~gipi~~~e~hS~~p~F~~i 389 (834) T TIGR01069 315 HPLLKESKEDEGGPAVVPVTLELK-----SEKRVLIITGPNTGGKTVTLKTLGLLALMAQSGIPIPAKESHSELPLFEEI 389 (834) T ss_pred CCCCCCCCCCCCCCEEEECCCCCC-----CCCCEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCEECCCCCCCCHHHHHH T ss_conf 989887432257964664462316-----641178886779961789999999999998727833117862211101212 Q ss_pred EEEEECCCCCCCCCCHHHHHHHHHHHHHHHCCC------------------CCEEEEECCCCCCCHHHHHHHHHHHHHHH Q ss_conf 676523766113853289999999999995899------------------85699932588988056799999999999 Q gi|254780750|r 697 FSRVGSADNLASGRSTFMVEMIETASILNQATN------------------QSFVILDEIGRGTATLDGLSIAWATIEYL 758 (920) Q Consensus 697 ftRiGa~D~l~~g~STF~vEm~e~~~IL~~at~------------------~SLVllDElGrGTst~DG~aiA~aile~l 758 (920) T Consensus 390 faDIGDEQSi~qnLSTFS~Hm~~i~~iL~~~~eGvqdvldPeidsPnhPifnsLVl~DE~gaGTDp~EGsALai~iLe~L 469 (834) T TIGR01069 390 FADIGDEQSIEQNLSTFSSHMKNISEILKKVDEGVQDVLDPEIDSPNHPIFNSLVLFDELGAGTDPDEGSALAISILEYL 469 (834) T ss_pred CCCCCCCCCHHHHHHHHHHHHHHHHHHHHHCCHHHHHHCCCCCCCCCCCCCHHHHHHHHHCCCCCHHHHHHHHHHHHHHH T ss_conf 01358842424337789999999999972144013330265668889874202566633015788868999999999998 Q ss_pred HHHCCCEEEEECCCHHHHHHHHHCCCEEEEEEEEEEECCEEEEEEEEEECCCCCCHHHHHHHHCCCCHHHHHHHHHHH Q ss_conf 972698499974875797664306885899999996099277877774478988778999998299989999999999 Q gi|254780750|r 759 HETNRCRGLLATHFHELTDLSKSLKRFHNATLQVSDSNEGIIFLHKVIPGIADHSYGIQVGKLAGLPNTVISRAYDIL 836 (920) Q Consensus 759 ~~~~~~~~lfaTHy~eL~~l~~~~~~v~n~~~~~~~~~~~i~flykl~~G~~~~Sygi~vA~laG~p~~vi~~A~~~~ 836 (920) T Consensus 470 ~~~-n~~v~~TTHy~~LK~~~y~~~~v~nASv~fD~Etl--~PtY~ll~g~~G~S~AF~iA~r~G~P~~iie~AK~~~ 544 (834) T TIGR01069 470 LKQ-NALVLITTHYKELKAYAYNNEGVENASVLFDEETL--SPTYKLLFGVPGRSYAFEIAQRLGIPSEIIEQAKEKY 544 (834) T ss_pred HCC-CCEEEEECCCHHHHHHCCCCCCCCHHHHHHCHHHC--CCCCEEEECCCCCHHHHHHHHHHCCCHHHHHHHHHHH T ss_conf 538-98499973534652200246640037766233422--7431220037871068899998479888999986742

HHsearch alignment for GI: 254780750 and conserved domain: TIGR01069