>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=100.00 E-value=1.6e-34 Score=227.34 Aligned_cols=335 Identities=19% Similarity=0.279 Sum_probs=236.7 Q ss_pred CCCHHHHHHHH-HHHHCCC---EEEEECCCCCHHHHHHHHHHHHHHCCCCCEEEEECCHHHHHHHHHHHHHHCCCCCCEE Q ss_conf 87478999999-9996798---0999588998689999999999975999499991604656999999998558888159 Q gi|255764515|r 2 NLAPHQTKIVD-WILDHKR---CAIWASMGSGKTVSVLTALSYIHLWGEKSVLVIAPLRVAQSVWTSEVQRWSNFSHMNI 77 (458) Q Consensus 2 ~L~p~Q~~~v~-~~~~~~~---~ll~~~~G~GKT~~al~~~~~l~~~~~~~~LIv~P~~l~~~~W~~Ei~kf~~~~~~~~ 77 (458) T Consensus 269 ~~RPYQEKSLrsKMFGNGRARSGiIVLPCGAGKsLVGvTAACTv----kKs~lVLctS~VSV~QW~~QFk~WSti~d~~I 344 (756) T TIGR00603 269 VLRPYQEKSLRSKMFGNGRARSGIIVLPCGAGKSLVGVTAACTV----KKSVLVLCTSAVSVEQWKQQFKLWSTIDDSQI 344 (756) T ss_pred CCCCCHHHHCCCCCCCCCCCCCCCEECCCCCCCCHHHHHHHEEE----EEEEEEEECCCHHHHHHHHHHHHCCCCCCCCC T ss_conf 88975111044456678611055177677888311225442023----10078972671008899988752268873551 Q ss_pred EEEECCHHHHHHHHCCCCCEEEECCCCHHHHH---------HHCCCCCCCCEEECCCCCCCCCCCCCCHHHHHHHHHHHH Q ss_conf 99858978988873077986998064202334---------420001132204404531002465431156777766543 Q gi|255764515|r 78 SVITGTVKQRTKVLKTPAVLYVINFENLGWLV---------QELKGTWPFATIVVDESTKLKSFRLRQGSKTARALAKPA 148 (458) Q Consensus 78 ~~~~g~~~~r~~~~~~~~~i~i~s~e~~~~~~---------~~~~~~~~~~~iIiDEaH~lkn~~~~~~s~~~~~l~~~~ 148 (458) T Consensus 345 crFTSD~Ke~---~~~~~gv~vsTYsMva~t~kRS~es~k~m~~l~~rEWGl~~LDEVHvv-------PA~mFRrVlt~~ 414 (756) T TIGR00603 345 CRFTSDAKEK---FHGEAGVVVSTYSMVAHTGKRSYESEKVMEWLTNREWGLILLDEVHVV-------PAAMFRRVLTIV 414 (756) T ss_pred CCCCCCCCCC---CCCCCCEEEECCCCCCCCCCCHHHHHHHHHHHHCCCCEEEEECCCCCC-------CCCCCCCHHHHH T ss_conf 1025213576---266533588733000247543188999999970687317986110103-------500166010144 Q ss_pred HCCCEEEEECCCCHH--HHCCCHHHHHHHCCCCCCCCCCHHHHHHHHCCHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 059807996584023--100101346775178887753277887773695640330000245555455899999742454 Q gi|255764515|r 149 WESERFIELTGTPSP--NGLIDLWGQIWFLDKGKRLGRVFQSFVARWFNTTQIGSHIGAVRYTAKETAQKEIEAQLSDCC 226 (458) Q Consensus 149 ~~~~~~l~LTgTPi~--n~~~el~~ll~~l~~~~~l~~~~~~f~~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~~ 226 (458) T Consensus 415 -~aHcKLGLTATLvREDdKI~D----LNFLIGP-------KLYEANWleL~~~Gf------------------------I 458 (756) T TIGR00603 415 -QAHCKLGLTATLVREDDKIQD----LNFLIGP-------KLYEANWLELQKKGF------------------------I 458 (756) T ss_pred -HHHHCCCCCEEEECCCCCCCC----CCCCCCC-------HHHHHHHHHHHCCCE------------------------E T ss_conf -332001432110011143031----2213572-------134532698820883------------------------6 Q ss_pred HHHHCCCCCCCCCCCEEEEEEECCHHHHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHCCC Q ss_conf 33200001001001100034524536899888999999851033452022347888875420354100022343000134 Q gi|255764515|r 227 LSLDIADYQNIDKPILITKKVPLPQPVMKQYHKFQRELYCDLQGENIEAFNSASKTVKCLQLANGAVYYDEEKHWKEVHD 306 (458) Q Consensus 227 ~~~~~~~~~~l~~~~~~~~~v~l~~~~~~~y~~~~~~~~~~~~~~~~~~~~~~~~~~~l~q~~~~~~~~~~~~~~~~~~~ 306 (458) T Consensus 459 A~V---qCA--------EVWCPMt~EFY~EYL~~~~------~~Kr~L-------------------LY-------~MNP 495 (756) T TIGR00603 459 ANV---QCA--------EVWCPMTPEFYREYLREKS------RKKRML-------------------LY-------VMNP 495 (756) T ss_pred EEE---EEC--------CCCCCCCHHHHHHHHHHHC------CCCCEE-------------------EE-------ECCC T ss_conf 887---412--------1017887778999985511------244303-------------------12-------0386 Q ss_pred CCCCCHHHHH---HCCCCCEEEEHHHHHHHHHHHH-----HCCCCCCCHHHHHHHHHHHC-CCCCCEEEEEHHHCCCCCC Q ss_conf 3333256654---1248840342223678886641-----00026533445899876424-5885589984422111622 Q gi|255764515|r 307 EKIKALEVII---EKANAAPIIVAYHFNSDLARLQ-----KAFPQGRTLDKDPCTIQEWN-EGKIPLLFAHPASCGHGLN 377 (458) Q Consensus 307 ~k~~~l~~il---~~~~~~kviif~~~~~~~~~i~-----~~~~~g~~~~~r~~~i~~f~-~~~~~vli~s~~~~~~Gln 377 (458) T Consensus 496 ~KFrACqFLI~fHE~~RgDKIIVFsDNVfAL~~YA~kl~KpfIYGpTsq~ER~~IL~nF~~n~~vnTIF~S-KVGDtSiD 574 (756) T TIGR00603 496 NKFRACQFLIRFHERQRGDKIIVFSDNVFALKEYAIKLGKPFIYGPTSQQERMQILQNFKHNPKVNTIFLS-KVGDTSID 574 (756) T ss_pred CHHHHHHHHHHHHHHCCCCEEEEECCHHHHHHHHHHHCCCCEEECCCCHHHHHHHHHHCCCCCCCCEEEEE-EECCCCCC T ss_conf 44357789888854148885899424478999999873896540798713799998621558864568984-30277514 Q ss_pred CCCCCCEEEEECCCC-CHHHHHHHHHHHHCCCCHHCC-----CC-CCEEEEEEEECCCHHH Q ss_conf 001785999908998-986864456666202202037-----87-7528999985899689 Q gi|255764515|r 378 LQYGGNILVFFSLWW-DLEEHQQMIERIGVTRQRQAG-----FK-RAVFVYYLIAQNTIDE 431 (458) Q Consensus 378 L~~a~~~iI~~~~~w-n~~~~~Q~~gRi~~~r~hR~G-----q~-~~v~v~~li~~~tide 431 (458) T Consensus 575 lPEA-nvlIQiSSH~GSRRQEAQRLGRILRAK~~~~~r~aggkE~YNAFFYSLVS~DTqEm 634 (756) T TIGR00603 575 LPEA-NVLIQISSHYGSRRQEAQRLGRILRAKKKSDARMAGGKEEYNAFFYSLVSKDTQEM 634 (756) T ss_pred CCCC-CEEEEEEECCCCHHHHHHHCCCCCCCCCCCHHHHCCCCCCCCEEEEECCCCCCEEE T ss_conf 2214-26776532677403687641320167875133313776442201210134451465

HHsearch alignment for GI: 255764515 and conserved domain: TIGR00603