>TIGR01055 parE_Gneg DNA topoisomerase IV, B subunit; InterPro: IPR005737 DNA topoisomerases regulate the number of topological links between two DNA strands (i.e. change the number of superhelical turns) by catalysing transient single- or double-strand breaks, crossing the strands through one another, then resealing the breaks. These enzymes have several functions: to remove DNA supercoils during transcription and DNA replication; for strand breakage during recombination; for chromosome condensation; and to disentangle intertwined DNA during mitosis , . DNA topoisomerases are divided into two classes: type I enzymes (5.99.1.2 from EC; topoisomerases I, III and V) break single-strand DNA, and type II enzymes (5.99.1.3 from EC; topoisomerases II, IV and VI) break double-strand DNA . Type II topoisomerases are ATP-dependent enzymes, and can be subdivided according to their structure and reaction mechanisms: type IIA (topoisomerase II or gyrase, and topoisomerase IV) and type IIB (topoisomerase VI). These enzymes are responsible for relaxing supercoiled DNA as well as for introducing both negative and positive supercoils . This entry represents subunit B (parE) of topoisomerase IV from Gram negative bacteria. Topoisomerase IV primarily decatenates DNA and relaxes positive supercoils, which is important in bacteria, where the circular chromosome becomes catenated, or linked, during replication . Topoisomerase IV consists of two polypeptide subunits, parC (subunit A), which is homologous to gyrA of topoisomerase II, and parE (subunit B), which is homologous to gyrB of topoisomerase II. More information about this protein can be found at Protein of the Month: DNA Topoisomerase .; GO: 0003677 DNA binding, 0003918 DNA topoisomerase (ATP-hydrolyzing) activity, 0005524 ATP binding, 0006265 DNA topological change, 0005694 chromosome.

Probab=100.00 E-value=0 Score=1487.68 Aligned_cols=627 Identities=42% Similarity=0.688 Sum_probs=581.2 Q ss_pred CCCCHHHCEECCCCCHHCCCCCCEECCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEEEEECCCCEEEEEECCCCCCCCC Q ss_conf 36786551231354200045871543279963254456567555788686077975799983898399997684453640 Q gi|254780814|r 8 SSYDADSIQILKGLDAVKKRPSMYIGDTDGESGLHHMIYEVLDNAIDESLEGYADIITVTLNMDGSCTVSDNGRGIPTDL 87 (803) Q Consensus 8 ~~Y~~~~i~~L~gle~vrkRP~mYiG~t~~~~Gl~hlv~EiidNsvDe~~~g~~~~I~V~i~~dgsisV~dnGrGIPv~~ 87 (803) T Consensus 2 ~~YsA~~I~VL~gLEPVr~RPGMY~GGtD-~~~~~HL~~EV~DN~~DEA~AGfA~~i~v~lH~D~Si~v~D~GRG~PvD~ 80 (647) T TIGR01055 2 TNYSAKDIEVLDGLEPVRKRPGMYTGGTD-TTRPNHLVQEVIDNSVDEALAGFASKIEVILHQDQSIEVIDNGRGMPVDI 80 (647) T ss_pred CCCCCCHHHHHCCCCCCCCCCCCEECCCC-CCCCHHHHHHHHHHHHHHHHCCCCEEEEEEECCCCEEEEEECCCCCCCCC T ss_conf 87461013220168773428872017865-65301345554433355554065307889982896179988883034427 Q ss_pred CCCC-CCCEEEEEEEEECCCCCCCCCCCEEECCCCCCEEEEEEECCCEEEEEEEECCEEEEEEEECCEECCCCEEECCCC Q ss_conf 7778-850012564250113232898604831167520377863264499999978959999988983646313873277 Q gi|254780814|r 88 HKEE-GISAAEVIMTRLHAGGKFNQKSYKVSGGLHGVGVSVVNALSSWLKLRIKREGNIYEMSFINGILDNPLVVTGSAG 166 (803) Q Consensus 88 h~~~-~~~~~E~i~t~L~ag~kfd~~~yk~sgGlhGvG~s~vNalS~~~~v~v~rdgk~~~q~f~~g~~~~~l~~~~~~~ 166 (803) T Consensus 81 HP~~P~~sa~EvILt~LHaG~KFSN~~Y~~sGGLHGVGISVVNALS~~~~i~V~~~G~~Y~~af~~G~K~~dL~~~~~~G 160 (647) T TIGR01055 81 HPKEPGVSAVEVILTKLHAGGKFSNKNYEFSGGLHGVGISVVNALSKRVKIKVKRQGKLYSIAFENGAKVTDLEVVGTCG 160 (647) T ss_pred CCCCCCCCEEEEEEEECCCCCCCCCCCCCCCCCEECCHHHHEEECCCEEEEEEEECCEEEEHHHHCCCCHHHHHHHHCCC T ss_conf 88888886235564300578521144401368600214320220132367899746704320221575110233211267 Q ss_pred -CCCCEEEEEEECHHHHHH-HHCCHHHHHHHHHHHHCCCCEEEEEEEECCC---CCCCEEEECCCCCCHHHHHHHCCCCC Q ss_conf -888708999877888542-1000899999999731146416999996358---64210100126883577653003565 Q gi|254780814|r 167 -NDTGTEVTFLPSSDIFSV-QDFNYDTLQHRLRELSFLNSSVQISLIDKRS---PEPREITMFYKGGIEAFVSYLDRHKK 241 (803) Q Consensus 167 -~~~GT~I~F~PD~~iF~~-~~~~~d~l~~R~~~~A~Ln~gl~i~l~Der~---~~~~~~~f~~~~Gi~~fv~~l~~~~~ 241 (803) T Consensus 161 kR~~GT~v~F~Pd~~~F~~k~~F~~~~l~~~~raKA~L~~Gv~I~f~~~v~~PsdiP~~~~~~y~~GL~DYL~~~v~~~~ 240 (647) T TIGR01055 161 KRLTGTSVHFTPDPEIFDSKLKFSVSRLYHILRAKAVLCRGVEIEFEDEVNNPSDIPTKALWNYEDGLKDYLSEAVNGLN 240 (647) T ss_pred CCCCCCEEEECCCCCHHCCCCCCCHHHHHHHHHHHHHCCCCCEEEEEEEECCCCCCCHHHHHHCCCCHHHHHHHHHCCCC T ss_conf 76556357731682010312255789999998632420267207897510686557545543110331368887631232 Q ss_pred CCCCCCEEE--EEEEEEEEEEEEEEECCCCCCEE-EEEECCCCCCCCCCEEHHHHHHHHHHHHHHHHHCCCCCCCCCCCC Q ss_conf 568852036--42003699973345317754121-222246216667721035688899999999986242000123576 Q gi|254780814|r 242 PLMQSPIRI--QGSRDNISIDLAMRWNDGYHENV-LCFTNNIPQKDGGTHLSGLRSALTRQITSYVEKSFGSKKDKRSVI 318 (803) Q Consensus 242 ~~~~~~i~~--~~~~~~~~veval~~~~~~~e~i-~SfvN~I~T~~GGtHv~gf~~al~~~i~~y~~~~~~~Kk~k~~~~ 318 (803) T Consensus 241 ~~~~~~F~G~~~~tvd~~~~~WAl~W~~~~~~~~~~SY~N~iPT~QGGTH~~GL~~~lL~a~~~f~E~~~~~P~~-~~Lt 319 (647) T TIGR01055 241 TLPKKPFVGNFEGTVDDEAVEWALLWLPEGGELLMESYVNLIPTIQGGTHVNGLRQGLLDALREFCEMRNLLPRG-VKLT 319 (647) T ss_pred CCCCCCEECCCCCCHHHHHCCEEEEECCCCCHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCE-EECC T ss_conf 234553002321101111002446632788400320411015789887104578999999999988875188640-2210 Q ss_pred HHHHHCCCEEEEEEECCCCCCCCCCHHHHCCCCCCHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 13430572156665213763357210020261111032111026899998740035799987789998877554553211 Q gi|254780814|r 319 GDDCREGFTSVLSIKMPDPRFSSQTKEKLVSSEVRSVVESFVNDGLSAWLEEHPLEAKIIVKKVLDASMVRDAARRARDL 398 (803) Q Consensus 319 ~~Diregl~~visvki~nP~F~gQTK~kL~s~~v~~~v~~~v~~~l~~~l~~n~~~ak~i~~k~~~a~~ar~~a~kar~~ 398 (803) T Consensus 320 ~eDI~~~~s~vLS~~~~~p~F~GQTKE~L~S~~~a~~V~~v~KD~F~~~L~~~~~~A~~L~E~~I~~A~~Rrn~~~~~~v 399 (647) T TIGR01055 320 AEDILDRCSYVLSIKMQDPQFAGQTKERLSSRQVAKLVSGVIKDAFDLWLNQNVQLAEKLAEIAISSAQRRRNKRAAKKV 399 (647) T ss_pred HHHHHHHHHEEEEEEEECCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCC T ss_conf 88887311101455665566577531233131357887777877888874110788999999998888877654553142 Q ss_pred CCCCCCCCCCCCCCCCCCCCCCCCCCEEEEEEECCCCCCCCCCCCCCCCEEEEECCCCCCCHHHCCHHHHHCCHHHHHHH Q ss_conf 00110012467667666655555552179998255754322334654430233005620334430587663236678888 Q gi|254780814|r 399 TRRKGVLDIASLPGKLADCSERDPKKSELFLVEGDSAGGSAKQGRSRENQAILPLRGKILNVERARFDKMLSSQEIGTLI 478 (803) Q Consensus 399 ~rrK~~~~~~~lpgKL~Dc~~k~~~~~eL~ivEGDSAggsak~gRdr~~qai~PLrGKilNv~~a~~~~i~~n~Ei~~l~ 478 (803) T Consensus 400 ~-RK~~~~~~~LPGKLADCt~~~~e~TELFlVEGDSAGGSAKQAR~RE~QAilPL~GKiLN~~~~~~~~vl~~~~i~D~~ 478 (647) T TIGR01055 400 V-RKKLTSGPALPGKLADCTRQDLEKTELFLVEGDSAGGSAKQARDREYQAILPLKGKILNTWEVSLDKVLNSQEIHDIE 478 (647) T ss_pred C-HHHHCCCCCCCCCCCCCCCCCCCCCEEEEEECCCCCCCHHHHCCCCCEEECCCCCCEEEEECCCHHHHHCCCCCCEEE T ss_conf 0-012104678897211334311126427898325677521343053201214456647763214644553124200021 Q ss_pred HHHCCCCCCCCCCCCCCCCCCEEEEECCCCCCCCHHHHHHHHHHHHHHHHHHCCEEEEECCCEEEEEECCCEEEEECHHH Q ss_conf 76257877533212356737389985088885328999999999630778748959994383378872671799814578 Q gi|254780814|r 479 TALGTGIGQDSFDINKLRYHKIIIMTDADVDGAHIRTLLLTFFFRQMPSLIHNGFLYIIKPPLYGITRGKSLQYVKDEES 558 (803) Q Consensus 479 ~~lG~~~g~~~~~~~~lrY~kiiimtDaD~DG~HI~~Llltff~~~~~~li~~g~~yia~ppl~~~~~~K~E~YikDD~E 558 (803) T Consensus 479 vAl~~~~~~~-~k~~~LRY~Ki~Il~DAD~DG~HIA~LL~~lF~~~~p~LV~~GH~Y~A~PPLYR~~~~~~vyYA~dEeE 557 (647) T TIGR01055 479 VALGIDPDSN-DKLSQLRYGKIIILADADSDGLHIATLLCALFLKHFPKLVEEGHVYVAKPPLYRIDLSKEVYYALDEEE 557 (647) T ss_pred EEEECCCCCH-HHHHHCCCCCEEEEECCCCCCHHHHHHHHHHHHHHHHHHHHCCCEEEECCCCEEEECCCEEEEECCHHH T ss_conf 0222487200-036426722288984178880789999999999988888753907871787202106870688528466 Q ss_pred HHHHHHHHCCCCHHCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHH Q ss_conf 98999850011000014577654354689999999999999998643445799999887421135112357789999999 Q gi|254780814|r 559 LEDYLINQSLSEEIELFCDSKGVISKNDLRNFIDDALKIDKLIKDFYPNHDKTFIEQAVISGVFNCESDQEINVSLASKL 638 (803) Q Consensus 559 L~~~Ll~~gl~~~~l~~~~~~~~l~ge~L~~li~~~~~~~~~l~~l~~~~~~~lle~l~~~~~l~~~~d~~~~~~~~~~l 638 (803) T Consensus 558 K~~~~~~L------------------------------------------------------------------------ 565 (647) T TIGR01055 558 KEKLLEKL------------------------------------------------------------------------ 565 (647) T ss_pred HHHHHHHH------------------------------------------------------------------------ T ss_conf 89999999------------------------------------------------------------------------ Q ss_pred HHHHHHHHHHCCCCEECCCCCCCEEEEEEECCCCEEEEECHHHHCCCCHHHHHHHHHHHHHHCCCCEEEEECCCEEEECC Q ss_conf 98876531000011002445670599999518530266466774164278999988887751145502765582587399 Q gi|254780814|r 639 ANRLNFIAEKSEKSWHGSINNSDILVKRIARGVQEQFVLEGSSIFSFGSKYKRIFSNRIEENYLTILSLICNGDKIKITG 718 (803) Q Consensus 639 ~~~l~~~~~~~~~~~~~~~~~~~i~~~~~~~Gv~~~~~l~~~~~~s~~~~~~~~~~~~l~~~~~~~~~l~~~~~~~~i~s 718 (803) T Consensus 566 -------------------------------------------------------------------------------- 565 (647) T TIGR01055 566 -------------------------------------------------------------------------------- 565 (647) T ss_pred -------------------------------------------------------------------------------- T ss_conf -------------------------------------------------------------------------------- Q ss_pred HHHHHHHHHHHHHCCCEEEECCCCCCCCHHHHHHCCCCHHHCEEEEEEHHHHHH--HH--HHHHHHCCCC-CCCHHHHHH Q ss_conf 899999999863067628603777788955722303896134021236798898--88--7865641899-876289988 Q gi|254780814|r 719 PCSLLDTIFSIGRKGISMQRYKGLGEMNASQLWETTLNPDTRSLLRVKITDASQ--AD--DLFSRLMGDE-VEPRREFIQ 793 (803) Q Consensus 719 ~~el~~~i~~~gkKG~sIQRYKGLGEMNPeQLWETTMDP~tRtLLqV~IeDa~~--Ad--~iF~~LMGD~-VEPRReFIe 793 (803) T Consensus 566 --------~~~sK~K~~V~RFKGLGEM~P~QL~ETT~~P~~R~L~~~T~~~~~~q~~D~l~~~D~LlaKKR~E~R~~~l~ 637 (647) T TIGR01055 566 --------KKKSKGKPNVQRFKGLGEMNPAQLRETTMDPNTRRLVQLTLDDVQDQRVDTLKLVDMLLAKKRSEDRKNWLQ 637 (647) T ss_pred --------HHHCCCCCCCCCCCCCCCCCCCHHHCCCCCCCCCEEEEEEEECCCCCCCCHHHHHHHHHCCCCCHHHHHHHH T ss_conf --------763068854411025456782012103588876137887631255655327999998750688446899999 Q ss_pred HHHHH Q ss_conf 52441 Q gi|254780814|r 794 ENSLP 798 (803) Q Consensus 794 ~NAL~ 798 (803) T Consensus 638 ~qalv 642 (647) T TIGR01055 638 EQALV 642 (647) T ss_pred HHHHH T ss_conf 87754

HHsearch alignment for GI: 254780814 and conserved domain: TIGR01055