>TIGR00603 rad25 DNA repair helicase rad25; InterPro: IPR001161 Xeroderma pigmentosum (XP) is a human autosomal recessive disease, characterised by a high incidence of sunlight-induced skin cancer. People's skin cells with this condition are hypersensitive to ultraviolet light, due to defects in the incision step of DNA excision repair. There are a minimum of seven genetic complementation groups involved in this pathway: XP-A to XP-G. XP-G is one of the most rare and phenotypically heterogeneous of XP, showing anything from slight to extreme dysfunction in DNA excision repair , . XP-G can be corrected by a 133 Kd nuclear protein, XPGC . XPGC is an acidic protein that confers normal UV resistance in expressing cells . It is a magnesium-dependent, single-strand DNA endonuclease that makes structure-specific endonucleolytic incisions in a DNA substrate containing a duplex region and single-stranded arms , . XPGC cleaves one strand of the duplex at the border with the single-stranded region . XPG belongs to a family of proteins that includes RAD2 from Saccharomyces cerevisiae (Baker's yeast) and rad13 from Schizosaccharomyces pombe (Fission yeast), which are single-stranded DNA endonucleases , ; mouse and human FEN-1, a structure-specific endonuclease; RAD2 from fission yeast and RAD27 from budding yeast; fission yeast exo1, a 5'-3' double-stranded DNA exonuclease that may act in a pathway that corrects mismatched base pairs; yeast DHS1, and yeast DIN7. Sequence alignment of this family of proteins reveals that similarities are largely confined to two regions. The first is located at the N-terminal extremity (N-region) and corresponds to the first 95 to 105 amino acids. The second region is internal (I-region) and found towards the C-terminus; it spans about 140 residues and contains a highly conserved core of 27 amino acids that includes a conserved pentapeptide (E-A-[DE]-A-[QS]). It is possible that the conserved acidic residues are involved in the catalytic mechanism of DNA excision repair in XPG. The amino acids linking the N- and I-regions are not conserved. This entry represents XP group B (XP-B) give rise to both XP and Cockayne syndrome . The DNA/RNA helicase domain IPR001650 from INTERPRO is also present in this group of proteins.; GO: 0003677 DNA binding, 0004003 ATP-dependent DNA helicase activity, 0005524 ATP binding, 0006289 nucleotide-excision repair, 0005634 nucleus.

Probab=98.63 E-value=3.7e-07 Score=67.31 Aligned_cols=297 Identities=19% Similarity=0.243 Sum_probs=176.1 Q ss_pred CCCCHHHHHHHH-HHH-CCC--CEEEECCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCEEEEECCCHHHHHHHHHHHHH Q ss_conf 878989999999-997-599--6999928987468999999999861042122556882799984998999999999999 Q gi|254780601|r 21 VNLTSVQEAILN-PDL-REK--DVLVSAQTGSGKTVAFGLALASTLLAENDRFSPASAPLALAIAPTRELAVQVGRELEW 96 (573) Q Consensus 21 ~~pt~iQ~~~ip-~~l-~g~--d~i~~a~TGsGKT~af~lp~l~~l~~~~~~~~~~~~~~~lil~PTrELa~Qv~~~~~~ 96 (573) T Consensus 268 t~~RPYQEKSLrsKMFGNGRARSGiIVLPCGAGKsLV-GvTAACTvk-----------Ks~lVLctS~VSV~QW~~QFk~ 335 (756) T TIGR00603 268 TVLRPYQEKSLRSKMFGNGRARSGIIVLPCGAGKSLV-GVTAACTVK-----------KSVLVLCTSAVSVEQWKQQFKL 335 (756) T ss_pred CCCCCCHHHHCCCCCCCCCCCCCCCEECCCCCCCCHH-HHHHHEEEE-----------EEEEEEECCCHHHHHHHHHHHH T ss_conf 7889751110444566786110551776778883112-254420231-----------0078972671008899988752 Q ss_pred HHHHCCCEEEEEECCCCHHHHHHHHCCCCEEEEECCC-------------CHHHHHHCCCCCCCCCEEEEEECCCCCCCC Q ss_conf 8544698799998899879999961289759982231-------------013321000122464318999613110010 Q gi|254780601|r 97 LYAKTGVVVAVCIGGVSVHRERRDLQNGAHIVVGTPG-------------RLCDHIRGKGLNISHLKAVVLDEADEMLDL 163 (573) Q Consensus 97 l~~~~~~~v~~~~gg~~~~~q~~~l~~~~~iiv~TPg-------------rl~d~~~~~~l~l~~v~~lVlDEaD~ml~~ 163 (573) T Consensus 336 WSti~d~~IcrFT---S--D~Ke~~~~~~gv~vsTYsMva~t~kRS~es~k~m~~l-----~~rEWGl~~LDEVHvvPA~ 405 (756) T TIGR00603 336 WSTIDDSQICRFT---S--DAKEKFHGEAGVVVSTYSMVAHTGKRSYESEKVMEWL-----TNREWGLILLDEVHVVPAA 405 (756) T ss_pred CCCCCCCCCCCCC---C--CCCCCCCCCCCEEEECCCCCCCCCCCHHHHHHHHHHH-----HCCCCEEEEECCCCCCCCC T ss_conf 2688735511025---2--1357626653358873300024754318899999997-----0687317986110103500 Q ss_pred HHHHHHHHHHHHCCCCCCEEEEECCCC---CCCHHHHHHHCCCCCC-----CCCCCCC----------CC---------- Q ss_conf 012357888752143342256311112---2200111121012333-----3233323----------25---------- Q gi|254780601|r 164 GFRDDIEFILDSSPKKRRMLMFSATIS---PAITTLAKNYQKDAVR-----VNIASEN----------RQ---------- 215 (573) Q Consensus 164 gf~~~i~~i~~~~p~~~q~~l~SAT~~---~~i~~l~~~~~~~p~~-----i~~~~~~----------~~---------- 215 (573) T Consensus 406 mFRrVlt~~~aH-----cKLGLTATLvREDdKI~DLN--FLIGPKLYEANWleL~~~GfIA~VqCAEVWCPMt~EFY~EY 478 (756) T TIGR00603 406 MFRRVLTIVQAH-----CKLGLTATLVREDDKIQDLN--FLIGPKLYEANWLELQKKGFIANVQCAEVWCPMTPEFYREY 478 (756) T ss_pred CCCCHHHHHHHH-----HCCCCCEEEECCCCCCCCCC--CCCCCHHHHHHHHHHHCCCEEEEEEECCCCCCCCHHHHHHH T ss_conf 166010144332-----00143211001114303122--13572134532698820883688741210178877789999 Q ss_pred --CCCC-CHHCCCCCCCHHHHHHHHCCCCCC---CCEEEEECCCHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHH Q ss_conf --6652-000000000002455420010235---6416775130233456555554226663010489999999999866 Q gi|254780601|r 216 --HSDI-DYRAVLVALSDRDNAIVNILRYHG---AKNAIVFCSTRASVSRFTKVLAEHLFQVVALSGELSQQERSNALQM 289 (573) Q Consensus 216 --~~~i-~~~~~~v~~~~k~~~l~~ll~~~~---~~~~ivF~~t~~~~~~l~~~L~~~g~~~~~lhg~~~q~~R~~~~~~ 289 (573) T Consensus 479 L~~~~~~Kr~LLY~MNP~KFrACqFLI~fHE~~RgDKIIVFsD---NVfAL~~YA~kl~--KpfIYGpTsq~ER~~IL~n 553 (756) T TIGR00603 479 LREKSRKKRMLLYVMNPNKFRACQFLIRFHERQRGDKIIVFSD---NVFALKEYAIKLG--KPFIYGPTSQQERMQILQN 553 (756) T ss_pred HHHHCCCCCEEEEECCCCHHHHHHHHHHHHHHCCCCEEEEECC---HHHHHHHHHHHCC--CCEEECCCCHHHHHHHHHH T ss_conf 8551124430312038644357789888854148885899424---4789999998738--9654079871379999862 Q ss_pred HHC-CCEEEEEECCCCCCCCCCCCCCEEEEECCCC-CHHHHHHHHCCCCCC----------CCCCEE---EEEECHH Q ss_conf 544-8814998538650014578873389705887-478999860301037----------888602---5640599 Q gi|254780601|r 290 MRD-GRARVCIATDVAARGIDLPDLELVIHAELSS-NPENLLHRSGRTGRA----------GRKGMS---VFVIPQN 351 (573) Q Consensus 290 fr~-g~~~vLV~TDvaaRGiDi~~v~~Vin~d~P~-~~~~yvHR~GRtgRa----------g~~G~a---i~l~~~~ 351 (573) T Consensus 554 F~~n~~vnTIF~SKVGDtSiDlPEAnvlIQiSSH~GSRRQEAQRLGRILRAK~~~~~r~aggkE~YNAFFYSLVS~D 630 (756) T TIGR00603 554 FKHNPKVNTIFLSKVGDTSIDLPEANVLIQISSHYGSRRQEAQRLGRILRAKKKSDARMAGGKEEYNAFFYSLVSKD 630 (756) T ss_pred CCCCCCCCEEEEEEECCCCCCCCCCCEEEEEEECCCCHHHHHHHCCCCCCCCCCCHHHHCCCCCCCCEEEEECCCCC T ss_conf 15588645689843027751422142677653267740368764132016787513331377644220121013445

HHsearch alignment for GI: 254780601 and conserved domain: TIGR00603