>TIGR00462 genX lysyl-tRNA synthetase homolog GenX; InterPro: IPR004525 The aminoacyl-tRNA synthetases (6.1.1. from EC) catalyse the attachment of an amino acid to its cognate transfer RNA molecule in a highly specific two-step reaction. These proteins differ widely in size and oligomeric state, and have limited sequence homology . The 20 aminoacyl-tRNA synthetases are divided into two classes, I and II. Class I aminoacyl-tRNA synthetases contain a characteristic Rossman fold catalytic domain and are mostly monomeric . Class II aminoacyl-tRNA synthetases share an anti-parallel beta-sheet fold flanked by alpha-helices , and are mostly dimeric or multimeric, containing at least three conserved regions , , . However, tRNA binding involves an alpha-helical structure that is conserved between class I and class II synthetases. In reactions catalysed by the class I aminoacyl-tRNA synthetases, the aminoacyl group is coupled to the 2'-hydroxyl of the tRNA, while, in class II reactions, the 3'-hydroxyl site is preferred. The synthetases specific for arginine, cysteine, glutamic acid, glutamine, isoleucine, leucine, methionine, tyrosine, tryptophan and valine belong to class I synthetases; these synthetases are further divided into three subclasses, a, b and c, according to sequence homology. The synthetases specific for alanine, asparagine, aspartic acid, glycine, histidine, lysine, phenylalanine, proline, serine, and threonine belong to class-II synthetases . This entry represents lysyl-tRNA synthetases from bacteria, as well as other related proteins. Escherichia coli, Haemophilus influenzae, and Aquifex aeolicus each have a protein closely homologous to the C-terminal region of lysyl-tRNA synthetase (LysS). Multiple sequence alignment of these proteins with the homologous regions of collected LysS proteins shows that these proteins form a distinct set rather than just similar truncations of LysS, so they appear to be orthologous. The protein is termed PoxA or GenX after its designation in E. coli. Its function is unknown.; GO: 0000166 nucleotide binding, 0004824 lysine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006430 lysyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=527.68 Aligned_cols=321 Identities=36% Similarity=0.593 Sum_probs=296.4 Q ss_pred CCCCCCCCHHHCCCHHHHHHHHHHHHHHHHHHHHHCCCEEEECCCEECCCCCCCCCCCEEEECCCCC-CCCCCCCCCCCH Q ss_conf 8987478831261548999999999999999999879889847821056898544541241024788-678320000285 Q gi|254781066|r 4 IPSQPWWNRDFHYRRRPFLLKRNMIQSSLREYFVENQFIEIDSMSLQYSPGNETHIRAFSTELIIQD-HIRKPLYLQTSP 82 (355) Q Consensus 4 ~p~~~~~~~~~~~r~R~~l~~Rs~i~~~iR~ff~~~gF~EV~TPiL~~~~~g~~~~~~f~t~~~~~~-~~~~~~yL~~SP 82 (355) T Consensus 6 M~~l~~W~Psa~i---~n~LkRa~~i~~iR~FF~e~G~~EV~TP~l~~~~~~D~~l~p~~~~~l~~g~~~~~~~WL~TSP 82 (330) T TIGR00462 6 MDLLDAWQPSADI---KNLLKRAKIIAEIRKFFKERGLLEVETPLLSDFPVTDLHLEPFKTEFLEPGGEQNKVLWLSTSP 82 (330) T ss_pred CHHHHCCCCCCCH---HHHHHHHHHHHHHHHHHHHCCCEEECCCCHHCCCCCCEEEEEEEEEEECCCCCCCCEECCCCCC T ss_conf 1033357865224---6778899999999998861784253263010156443022136888842665333312114587 Q ss_pred HHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCEEEECEEECCCCHHHHHHHHHHHHHHHHHHHCCCEECCCCCCCCCC Q ss_conf 89999898744688999886424567775448430020001157765787775578887766641883000223433246 Q gi|254781066|r 83 EFSCKKLLAAGEEKIFCFAHAWRNGEQGCLHQPEFTMLEWYRAHESYEQLMKDCMNIIRCAAEVANQKIFSFQNVNCNPF 162 (355) Q Consensus 83 ql~lK~ll~~G~~rvyqig~~FRaE~~~~rHlpEFtmLE~e~af~d~~dlm~~~E~li~~~~~~~~~~~~~~~~~~~~~~ 162 (355) T Consensus 83 EY~MK~LL~~~~~~iFQi~k~FRN~E~G~~H~~EF~MLEWY~~~~d~~~Li~E~~~LL~~~ld----------------~ 146 (330) T TIGR00462 83 EYHMKRLLSAGKGPIFQITKVFRNEEAGRLHNPEFTMLEWYRPHYDMLRLINEVDDLLQQLLD----------------C 146 (330) T ss_pred CHHHHHHHHHCCCCEEEEEEHHHHCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHC----------------C T ss_conf 278999986217862310000100024675775310011121102389999999999999728----------------8 Q ss_pred CCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCHHHHHHHHHHCCCC--CCCCCCHHHHHHHHHHCEECCCCCCCCCCCCCC Q ss_conf 773207888865666087653234555623279999999976887--787653478987664300362237675443257 Q gi|254781066|r 163 SEPEYITVAEAFARYANIDLGTTLDNPDQPDRHLLYLQAQQAGIR--VAHDDTWSDIFSRILIEKIEPNLGINCCTILDR 240 (355) Q Consensus 163 ~~~~~i~~~e~~~~~~~~d~~~~~~~~~~~~~~~~~~~~~~~~~~--~~~~~~~~~~~~~l~~~~ie~~l~~~~pvfi~~ 240 (355) T Consensus 147 ~~~E~l~~~~~F~~y~g~d~l~-------~e~s~l~E~~~k~~~~~~~~~~ED~~TLl~~~F~~~VE~~~G~~rP~~~~~ 219 (330) T TIGR00462 147 PEAESLSYQEAFKRYLGLDPLS-------AEKSELKELAEKKDLDNVAEEDEDRDTLLQLLFIEVVEPQIGKERPTFVYH 219 (330) T ss_pred CCCCEECHHHHHHHHHCCCCCC-------HHHHHHHHHHHHCCCHHHHCCCCCHHHHHHHHHHHHHHHCCCCCCCEEEEE T ss_conf 6300001899999984479873-------025789999985473233203444799999999876401037778757880 Q ss_pred CCHHHHHHCCCCCCCCCCCCCCEEEECCEECCCCCHHCCCHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHC-CCCCC Q ss_conf 68888641367877836330220223671225640210699999999999999997288853010189999861-88963 Q gi|254781066|r 241 YPAPESALANIYPADPRFTKRFELYACNIELCNACDELLDPIEQRHRFEKEMQEKKKIYNETYPIDEDFLACLT-EMPQS 319 (355) Q Consensus 241 yP~~~~plak~~~~~~~va~rfdl~i~G~El~ng~~El~d~~~q~~rf~~q~~~k~~~~~e~~~~D~~fl~al~-G~PPh 319 (355) T Consensus 220 FP~~~aaLA~v~~eD~~~AERFE~y~KGiELANGf~E~t~a~E~r~R~E~~~~kR~~~~~P~~~~D~~~i~A~~~GMP~c 299 (330) T TIGR00462 220 FPERQAALAQVSTEDNRVAERFELYYKGIELANGFHELTDAEEQRKRFERDNKKRAKRELPTLPIDEDFIKALEDGMPDC 299 (330) T ss_pred CCHHHHHHHCCCCCCCCCCHHEEHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHCCCCCC T ss_conf 70455555204513363200100100100002775322584889988768877788625898514599999985478741 Q ss_pred CEEECCHHHHHHHHHCCCCHHHHCCCCCCCC Q ss_conf 2453159999899815597131115856487 Q gi|254781066|r 320 SGIAMGFDRLVMLVTGANNINEVIWTPFSQS 350 (355) Q Consensus 320 gG~glGidRLvm~l~g~~~Irdvi~FP~~r~ 350 (355) T Consensus 300 sGvaLGiDRL~~l~Lg~E~l~~~~~~avD~a 330 (330) T TIGR00462 300 SGVALGIDRLVMLALGKEELVEVIAFAVDRA 330 (330) T ss_pred CCHHHHHHHHHHHHHCCHHHHHHHHHHHCCC T ss_conf 4402557899998707326888998863159

HHsearch alignment for GI: 254781066 and conserved domain: TIGR00462