>TIGR02225 recomb_XerD tyrosine recombinase XerD; InterPro: IPR011932 Proteins in this entry are part of the wider so-called "phage" integrase fmaily which describes a number of recombinases with tyrosine active sites that transiently bind covalently to DNA. Many are associated with mobile DNA elements, including phage, transposons, and phase variation loci. This entry represents the chromosomally-encoded polypeptide XerD, which is closely related to, and interacts with, another chromosomally-encoded polypeptide, XerC (IPR011931 from INTERPRO). These proteins are site-specific tyrosine recombinases, which act by catalyzing the cutting and rejoining of the recombining DNA molecules . They form a cyclic heterotetrameric complex composed of two molecules of XerC and two molecules of XerD. The XerC-XerD complex is essential to convert dimers of the bacterial chromosome into monomers to permit their segregation at cell division. It also contributes to the segregational stability of plasmids. XerD is composed of two domains, an N-terminal alpha-helical domain, and a C-terminal domain composed mostly of alpha helices, with a three-stranded antiprallel beta sheet along one edge . The active site is found at the extreme C-terminal end of the polypeptide. Most of the C-terminal domain is structurally homologous to that of other "phage" integrases, but the active site regions of these enzymes are stucturally distinct.; GO: 0003677 DNA binding, 0006310 DNA recombination, 0007049 cell cycle, 0007059 chromosome segregation, 0015074 DNA integration, 0051301 cell division.

Probab=100.00 E-value=0 Score=324.43 Aligned_cols=247 Identities=19% Similarity=0.263 Sum_probs=221.4 Q ss_pred CCCCHHHHHHHHHHHHHHHHHHC--CC-CHHHCCHHHHHHHHHHH---CCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 35697889999999999999956--99-95896999999988751---59978999999999999964455200105665 Q gi|254780134|r 85 GSLAVNSRISFESYFDQIIRKSG--DF-DYRKITTKHIRSGVESR---KHTPSSAIQFLTSMRVLFKWAVRQEYVAINPC 158 (348) Q Consensus 85 ~~l~~~T~~~~~~~~~~~~~~~g--~~-~l~~it~~~i~~~~~~~---~~~~~t~n~~~~~l~~~~~~a~~~~~i~~NP~ 158 (348) T Consensus 11 ~GLs~NT~~aYrrDL~~f~~~L~~~~~g~~~~~~~~~i~~fl~~l~~~g~~~~S~AR~lsalR~Fy~fL~~e~~~~~dP~ 90 (305) T TIGR02225 11 RGLSQNTLEAYRRDLEKFLEYLEESERGDLAEVDRGDIEDFLAELKEAGLSARSIARALSALRSFYRFLLREGLREDDPS 90 (305) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHCCCCCCHHHCCHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCCCH T ss_conf 63538889999999999999862224787641687899999999986687700288999999999999986887455733 Q ss_pred HC-CCCCCCCCCCCCCCCHHHHHHHHHHH-CC----C-----CHHHHHHHHHHHCCCCCCCCCCCCCCEEE--EEC-CCC Q ss_conf 10-34643244442116523445666640-37----8-----08999989898618873100256640144--302-332 Q gi|254780134|r 159 LS-VERPKRKTEGIRPWTKEDMQQFKSFW-SE----G-----SQPRLAFEFLLYSGLRCSDSCRAGVQHLQ--NNI-FSI 224 (348) Q Consensus 159 ~~-v~~~~~~~~~~~~~t~~ei~~~~~~~-~~----~-----~~~~~~~~l~~~TG~R~~Ei~~L~~~did--~~~-i~~ 224 (348) T Consensus 91 ~~~~~~PK~~~~LP~vLt~~EV~~LL~~p~~~~~~~g~kr~~lRDrAmLElLYATGlRVSELv~L~~~d~~l~~g~~~~~ 170 (305) T TIGR02225 91 ALRIETPKVARKLPKVLTVEEVEALLAAPIDVDTPLGGKRPALRDRAMLELLYATGLRVSELVGLRLEDVNLDEGVKVRK 170 (305) T ss_pred HHHHHCCCCCCCCCCCCCHHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHHHCCCCEEEEECCCHHHHHCCCCEEEEE T ss_conf 66420342245788837989999998500246776767640165479999998648835533056166520027737999 Q ss_pred CCCCCHHHHHHCCHHHHHHHHHHH------------CCCCCC---CCCCCC-CCCCCHHHHHHHHHHHHHHCCCCC--CC Q ss_conf 113310243311216899999642------------013322---112224-577587789999999999838899--81 Q gi|254780134|r 225 KTQKTGTIITVELPDGFMKLLAMT------------PIGKET---FFINND-KQKMNATQFSIWFKAKATKAGVNK--SA 286 (348) Q Consensus 225 ~~~Kt~~~~~vpl~~~l~~~l~~~------------~~~~~~---~~~~~~-g~~~~~~~~~~~~~~~~~~agi~~--~~ 286 (348) T Consensus 171 v~GKG~KERlVP~G~~A~~~l~~Yl~~~R~~~~~~~~~~~d~~~~LFln~~~G~~lsRQ~~W~~~K~~A~~aGI~k~isP 250 (305) T TIGR02225 171 VRGKGSKERLVPLGEEAIEALERYLKEARPLLLKKKKKSSDAKSALFLNRREGGPLSRQGFWKILKEYAKRAGIEKPISP 250 (305) T ss_pred EEECCCCEEECCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCCCCCCC T ss_conf 86168841202202899999999998740676417788875543112468888887889999999999998188989997 Q ss_pred CHHHHHHHHHHHHCCCCHHHHHHHHCCCCHHHHHHHHHHHHHHHHH Q ss_conf 4026999999998489988999996499989999999999899999 Q gi|254780134|r 287 HGVRKFSATISADAGATAHELMATYGWKTVDQAETYTKGADRIRLG 332 (348) Q Consensus 287 H~lRht~at~l~~~G~~~~~i~~~lGHss~~~t~~Y~~~~~~~r~a 332 (348) T Consensus 251 HtLRHSFATHLLenGADLR~VQeLLGHadisTTQIYTHV~-~~~L~ 295 (305) T TIGR02225 251 HTLRHSFATHLLENGADLRVVQELLGHADISTTQIYTHVA-RERLK 295 (305) T ss_pred CCCHHHHHHHHHHCCCCHHHHHHHHCCCHHHHHHHHHHHH-HHHHH T ss_conf 5104679999873688276887774322147889999987-99999

HHsearch alignment for GI: 254780134 and conserved domain: TIGR02225