>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=386.76 Aligned_cols=300 Identities=34% Similarity=0.551 Sum_probs=260.3 Q ss_pred HHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCC-CCCCCEEEEEC----CCCCCCCCCCHHHHHHHHHHHCCCCCHHHH Q ss_conf 5788999999998738553454311565323566-65542036412----222254321001223444421024302454 Q gi|254781118|r 175 RFQQRSLLISQIRHFMEKKGFMEVETPILQPIYG-GATADPFKTHH----NILKADMYLRIAPELYLKRVLISGLTDQVF 249 (502) Q Consensus 175 ~l~~Rs~i~~~iR~~l~~~gF~EveTP~L~~~~~-g~~~~~F~~~~----~~~~~~~yL~qSpql~~k~l~~~G~~drvf 249 (502) T Consensus 20 n~LkRa~~i~~iR~FF~e~G~~EV~TP~l~~~~~~D~~l~p~~~~~l~~g~~~~~~~WL~TSPEY~MK~LL~~~~-~~iF 98 (330) T TIGR00462 20 NLLKRAKIIAEIRKFFKERGLLEVETPLLSDFPVTDLHLEPFKTEFLEPGGEQNKVLWLSTSPEYHMKRLLSAGK-GPIF 98 (330) T ss_pred HHHHHHHHHHHHHHHHHHCCCEEECCCCHHCCCCCCEEEEEEEEEEECCCCCCCCEECCCCCCCHHHHHHHHHCC-CCEE T ss_conf 778899999999998861784253263010156443022136888842665333312114587278999986217-8623 Q ss_pred HHHHHHCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCCCCCEEECCCCCCCEEEEECCCCCC Q ss_conf 34532025423443245210001001100011124567899998899870886131175341133221000000023344 Q gi|254781118|r 250 ELNRNFRNEGVSSRHNPEFTMIEAYWAYTDYRDMMKLVEDLCHNLAKTLHGTTDIPFGEKVISFKAPFACKSMLQLVKEA 329 (502) Q Consensus 250 eI~~~FR~E~~~~~H~pEFt~lE~e~a~~d~~dim~l~E~li~~i~~~~~~~~~~~~~~~~~d~~~~f~~~~~~e~i~~~ 329 (502) T Consensus 99 Qi~k~FRN~E~G~~H~~EF~MLEWY~~~~d~~~Li~E~~~LL~~~ld----------------~-~~~E~l~~~~~F~~y 161 (330) T TIGR00462 99 QITKVFRNEEAGRLHNPEFTMLEWYRPHYDMLRLINEVDDLLQQLLD----------------C-PEAESLSYQEAFKRY 161 (330) T ss_pred EEEEHHHHCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHC----------------C-CCCCEECHHHHHHHH T ss_conf 10000100024675775310011121102389999999999999728----------------8-630000189999998 Q ss_pred CCCCCCCCCCHHHHHHHHHHHCCC--CCCCCCHHHHHHHHHHHCCCHHEE--CCEEEECCCHHHHHHHCCCCCCHHHEEE Q ss_conf 886215433216777656520235--433223189998876521301010--5435655800234530357967211011 Q gi|254781118|r 330 TGLDFMLLKSDQEARVAAQSIGIT--VENDALWGEVMMTIFEEKIEKNIV--NPTHITDFPKDISPFAKEVAGEKRLVER 405 (502) Q Consensus 330 ~g~~~~~~~~~e~~~~~~~~~g~~--~~~~~~~g~l~~~~~e~~ie~~~~--~p~fI~dfP~~~~Pf~~~~~~~~~~~~~ 405 (502) T Consensus 162 ~g~d~l~-~e~s~l~E~~~k~~~~~~~~~~ED~~TLl~~~F~~~VE~~~G~~rP~~~~~FP~~~aaLA~v~~eD~~~AER 240 (330) T TIGR00462 162 LGLDPLS-AEKSELKELAEKKDLDNVAEEDEDRDTLLQLLFIEVVEPQIGKERPTFVYHFPERQAALAQVSTEDNRVAER 240 (330) T ss_pred HCCCCCC-HHHHHHHHHHHHCCCHHHHCCCCCHHHHHHHHHHHHHHHCCCCCCCEEEEECCHHHHHHHCCCCCCCCCCHH T ss_conf 4479873-025789999985473233203444799999999876401037778757880704555552045133632001 Q ss_pred CCEEECCEEEEECHHEECCHHHHHHHHHHHHHHHHCCCC-CCCCCHHHHHHHHCCCCCCCCEECCHHHHHHHHCCCCCCE Q ss_conf 135555787200211005799999999999988730573-3545089999976086984613246899989982628840 Q gi|254781118|r 406 FETYCNGWEICNAFSELNDPVEQRIRMEQQVEQSHQRGE-HTILDEDFLDAMTYGMPPASGLGLGIDRLIMLLTNAPSIR 484 (502) Q Consensus 406 fdl~~~G~Ei~~G~~e~~dp~~q~~r~~~~~~~~~~~~~-~~~~~~~yl~a~~yG~PPhgG~glGldRL~m~l~g~~~IR 484 (502) T Consensus 241 FE~y~KGiELANGf~E~t~a~E~r~R~E~~~~kR~~~~~P~~~~D~~~i~A~~~GMP~csGvaLGiDRL~~l~Lg~E~l~ 320 (330) T TIGR00462 241 FELYYKGIELANGFHELTDAEEQRKRFERDNKKRAKRELPTLPIDEDFIKALEDGMPDCSGVALGIDRLVMLALGKEELV 320 (330) T ss_pred EEHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHCCCCCCCCHHHHHHHHHHHHHCCHHHH T ss_conf 00100100002775322584889988768877788625898514599999985478741440255789999870732688 Q ss_pred ECCCCCCCC Q ss_conf 412786757 Q gi|254781118|r 485 DVILFPAQR 493 (502) Q Consensus 485 dvi~FP~~k 493 (502) T Consensus 321 ~~~~~avD~ 329 (330) T TIGR00462 321 EVIAFAVDR 329 (330) T ss_pred HHHHHHHCC T ss_conf 899886315

HHsearch alignment for GI: 254781118 and conserved domain: TIGR00462