>TIGR00392 ileS isoleucyl-tRNA synthetase; InterPro: IPR002301 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 . Isoleucyl-tRNA synthetase (6.1.1.5 from EC) is an alpha monomer that belongs to class Ia. The enzyme, isoleucyl-transfer RNA synthetase, activates not only the cognate substrate L-isoleucine but also the minimally distinct L-valine in the first, aminoacylation step. Then, in a second, "editing" step, the synthetase itself rapidly hydrolyzes only the valylated products , as shown from the crystal structures. ; GO: 0000166 nucleotide binding, 0004822 isoleucine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006428 isoleucyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=2092.29 Aligned_cols=833 Identities=39% Similarity=0.690 Sum_probs=775.2 Q ss_pred CCCCCCCHHHHHHHHHHHHHHCCCCHHHHHCCCCCCCEEEECCCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCC Q ss_conf 99888996897799999998647614454056888848996282255889762157785668789987670898267888 Q gi|254780445|r 19 DFPMRAKLPQKESELITYWQKIRLFDKIRESAVGRKNFTLHDGPPYANGHIHIGHALNKILKDVIVRSFQMRNFNACFVP 98 (963) Q Consensus 19 ~Fp~r~~~~~~E~~~~~~W~~~~~f~~~~~~~~~~~~f~l~dgPPy~nG~lH~GH~~n~~~kDi~~Ry~rm~G~~Vl~~~ 98 (963) T Consensus 1 ~~~~~~nl~~~E~~~~~~W~~~dif~~~~~~~~~~~~F~lhDGPPYAnG~iHlGHalNKilKDii~Ryk~m~G~~v~~~p 80 (938) T TIGR00392 1 KFPMRGNLSKREEKILKFWQEKDIFEKVKKRNKDKPEFVLHDGPPYANGAIHLGHALNKILKDIILRYKTMQGYNVTYKP 80 (938) T ss_pred CCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCEEEECCCCCCCCCCCHHHHHHHHHHHHHHHHCCCCCEECCCCC T ss_conf 98877882125757776677899999999850899835874485876799740255666761123210112250032047 Q ss_pred CCCCCCCHHHHHHHHHHHHCCCCH-HHCC-HHHHHHHHHHHHHHHHHHHHHHHHHCCEEEECCCCEECCCHHHHHHHHHH Q ss_conf 824442089999999876559983-3489-99999999999999999999999970607763698115776798999999 Q gi|254780445|r 99 GWDCHGLPIEWKVENEYLAKGKKK-DDIP-VNEFRQACRDSASAWVKIQSKEFQRLGIVGDFENPYTTMTRESEAQIASE 176 (963) Q Consensus 99 GwD~hGLPiE~~vek~l~~~~~~~-~~~~-~~~~~~~c~~~a~~~i~~~~~~~~rlG~~~Dw~~~y~T~dp~y~~~~~~~ 176 (963) T Consensus 81 GWDtHGLPIE~~Vek~lg~~~~~~~~~~~g~E~fr~~Cr~~A~~~~~~q~~~F~rLG~w~Dwe~pY~T~d~~y~~~~w~~ 160 (938) T TIGR00392 81 GWDTHGLPIELKVEKKLGISGKKEIESLEGIEEFREKCREFALKQIEEQREQFQRLGVWGDWENPYKTMDPSYEESQWWL 160 (938) T ss_pred CCCCCCCCEEEEEECCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCEEECCCCCCCCCCCHHHHHHHHHH T ss_conf 86657870244564047876400022044389999999999999999999888853120225578506788999999999 Q ss_pred HHHHHHCCCEECCCCEEEECCCCCCCCCCHHHEEEE-----EECCEEEEEEEECCCCCCC------------CCCCCCHH Q ss_conf 999998796110343022057435736500210132-----1057799983303753112------------20011000 Q gi|254780445|r 177 LLKIAESDQIYRGIKPIMWSIAEQTTLAEAEIEYHD-----VDSDSILVGFPVKSSADYL------------IKSQIVIW 239 (963) Q Consensus 177 F~~l~~kGliyr~~~pV~w~p~~~T~La~~Evey~d-----~~~~s~~v~F~l~~~~~~~------------~~~~~~iw 239 (963) T Consensus 161 l~~~~eKGL~~~~~kpv~WSp~~~TaLAeaE~ey~~~Y~d~v~dpS~yv~F~~~~~~~~~rh~~~~~~~~n~~~~~l~iW 240 (938) T TIGR00392 161 LKELHEKGLLYRGLKPVYWSPRCETALAEAEVEYKEEYKDNVKDPSIYVKFPVKKDSKTERHAKVKLSGVNGLDISLVIW 240 (938) T ss_pred HHHHHHCCCEEECCEEECCCCCCCCHHHHHHHCCCCCCCCCCCCCEEEEEEEEECCCHHHHHHHHHCCCCCCCCCEEEEE T ss_conf 99997524202255221144144670247630588732157606228898753156125678874268757888689996 Q ss_pred CCHHHHHHHHHHHHCCCCCCEEEEEECCCCCCCCCCCCCEEEECCCHHHHHHHHCCC-----CEEEEEECCCCCCCCCEE Q ss_conf 000578865445322776745899830665311112374355121118888876098-----517841001111128575 Q gi|254780445|r 240 TTTPWTIPGNRAIAFSSNHQYGLYDVISCSGQHTFDTGKKLIISKNLAQSIANQTNV-----KIALVCDVKAEDLSKTMC 314 (963) Q Consensus 240 TTrP~Tl~~n~ai~v~p~~~Y~~~~~~~~~~~~~~~~~~~~i~a~~~~~~~~~~~~~-----~~~~~~~~~g~~l~g~~~ 314 (963) T Consensus 241 TTTPWTLPaN~Aiav~pd~eY~~~~~~~~y----~g~~~~~i~a~~L~e~l~~~~g~~h~~~~~e~~~~~kG~~Le~l~Y 316 (938) T TIGR00392 241 TTTPWTLPANLAIAVHPDFEYALVQLETDY----SGKEEYLILAKKLVEKLLNKLGVEHDITDYEIIKTFKGSDLEGLEY 316 (938) T ss_pred CCCCCHHHHHHHEEECCCEEEEEEEECCCC----CCCEEEEEEHHHHHHHHHHHCCCCCCCCCEEEEEEECCCCCCCCEE T ss_conf 688714466416011445068999866874----6631255512567898864215534531107865551644165246 Q ss_pred EECCCCCCCCEE-----------------EECCCCCCCCCCCCCCEEEEECCCCHHHHHHHHHCCCHHHHHCCCE--EEE Q ss_conf 431378665125-----------------5114432233224454056405789889899876052122100220--343 Q gi|254780445|r 315 SHPLKKLGYTFS-----------------VPLIDAEYVANDCGTGFVHVAPSHGVEDFTAWNEAKDILLNRSVDI--KVP 375 (963) Q Consensus 315 ~~Pl~~~~~~~~-----------------~pi~~~d~V~~~~GTG~Vh~aPahg~~Dy~~~~~~~~~~~~~~~~l--~~~ 375 (963) T Consensus 317 ~hpl~~~~~~~~~m~~~~L~~~~~~~e~~~~v~~gdhVT~~~GTG~VHtAPghG~eDy~---------~g~kygl~~e~~ 387 (938) T TIGR00392 317 EHPLYDKVSQLKGMVVEELIERVDEKEGAPVVIGGDHVTTEDGTGIVHTAPGHGEEDYE---------IGKKYGLPDEVL 387 (938) T ss_pred ECCCCCCCCCCCCCCHHHHHHHHCCCCCCEEEEECCEEECCCCCEEEECCCCCCHHHHH---------HHHHHCCCCCCC T ss_conf 52665322011563252322310689864489840045468897226878898732899---------999828986431 Q ss_pred ECCCCCCCCCCCCCCCCCCCCCCCCCC--CCC-----------CCHHHHHHHHHCCCCCCHHHHCCCCCCCCCCCCCEEE Q ss_conf 023445510243100178632113554--445-----------6754523566479821000000122113210132033 Q gi|254780445|r 376 SPVDGRGFYTTEAPGFSGARVLDDAGE--KGN-----------ANEVVIAALINACAILNRSIVKHSYPHSWRSKKPIIF 442 (963) Q Consensus 376 ~~vd~~G~~~~~~~~~~G~~v~~~~~~--~~~-----------a~~~ii~~L~e~g~l~~~~~~~H~yP~cwR~~~pii~ 442 (963) T Consensus 388 ~pvD~~G~y~~~~~~~~G~~v~~~d~~yi~~~~R~V~~Ayd~~An~~I~~~L~~~~~Ll~~e~i~H~YPhcWRtk~P~IY 467 (938) T TIGR00392 388 SPVDEKGVYTEEVADFKGRFVKDADKDYIIIKGRYVKDAYDDEANKIIIEQLKDKGLLLKAEKITHSYPHCWRTKTPVIY 467 (938) T ss_pred CCCCCCCEECCCCCCCCCCEEEECCCCEEEECCCEEECHHHHHHHHHHHHHHHHCCCEEEEEEEECCCCCCCCCCCCEEE T ss_conf 46687760336677744541664487224543741000433468999999984269778876655058770778984572 Q ss_pred EEEEEEEEEECCCCCCCHHHHHHHHHHHHCCCCCCCCC-CCCHHHHHHCCCCCCCCCCCCCCCCEEEEECCCC-CE-EEC Q ss_conf 33102366302245542368999987520000024443-4320244304320000112345672258982588-47-325 Q gi|254780445|r 443 RTTSQWFLHMDKKLGDGSTLRSRALSEVEKIRFFPSSG-KNRLRSMIENRPDWLLSRQRNWGVPICFFYNEKG-EI-LLD 519 (963) Q Consensus 443 r~~~QWFi~~d~~~~~~~~~k~~~l~~i~~v~~~P~~~-k~r~~~~i~~~~DW~ISRqR~WG~PIPi~~~e~~-~~-~~~ 519 (963) T Consensus 468 RAt~QWF~~~D~-----~~~k~~~L~~i~~v~W~P~~~k~~R~~~~~~n~~DWcISRQR~WG~PIP~w~~e~~~~~~l~~ 542 (938) T TIGR00392 468 RATEQWFIKIDE-----KKIKDQMLEEIKKVKWVPEWGKEGRFKNWLENRKDWCISRQRYWGVPIPVWYCEDTGEPVLIV 542 (938) T ss_pred ECCCCCEEECCH-----HHHHHHHHHHCCCEEECCCCCCCHHHHHHHHCCCCCEEECCCCCCCCCEEEEECCCCCEEEEE T ss_conf 047221466354-----777899998628327614632214678876116765263356258974068866788326776 Q ss_pred CCHHHHHHHHHH-HCCCCCCCCCCCHHCC-----CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC-----CCCCCCCC Q ss_conf 211244421222-1188743356401114-----688788755456642100003335454332222-----23334431 Q gi|254780445|r 520 KAINDRIIKTFK-DQGSDAWFSEGSRDFF-----LGDRASEPWIQSKDILDVWFDSACTHTILLGKD-----PKLAWPAD 588 (963) Q Consensus 520 ~~~~~~i~~~~~-~~g~d~~~~~~~~~~~-----~~~~~~~~~~r~~DvlDvWfDSg~s~~~~~~~~-----~~~~~PaD 588 (963) T Consensus 543 ~gsi~el~~~~~~~~G~~~w~~d~~~~~~d~~~~~~~~g~~~y~r~~DvlDVWFDSGs~~~A~~~~~~~~~~~~~~~pAD 622 (938) T TIGR00392 543 VGSIEELEELIEVEKGIDAWFEDLHKDLLDKITLESGSGGGEYRRVPDVLDVWFDSGSMPYAVLHYPFENEKFKEVFPAD 622 (938) T ss_pred ECCHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEECEEEEEECCCCHHHHHHHHCCCCCHHHCCCCCCE T ss_conf 04089999999987256632223444457741345889984258712155451140011799863232100103578302 Q ss_pred CCCCCCCCCCHHHHHHHHHHHHCC--CCCEEEEECCCCCEECCCCCCHHCCCCCCCCHHHHHC--------CCCHHHHHH Q ss_conf 002554442111245544433117--8400001303782621345300001234433366411--------367578878 Q gi|254780445|r 589 VYLEGSDQHRGWFQHSLLESCATR--GSTPFTSLITHGFSVDENGEKMSKSKGNVVFPEEIIS--------ESGADVLRY 658 (963) Q Consensus 589 ~~~eG~Dq~RgWF~s~ll~~~~~~--~~~Pfk~v~~hG~vld~~G~KMSKS~GNvi~p~~ii~--------~yGaD~lR~ 658 (963) T Consensus 623 ~i~EG~DQ~RGWFySsl~~~~~~~nv~~~PYK~Vi~hGF~LDe~G~KMSKSlGNvV~P~~v~~G~~N~~~P~yGAD~LRl 702 (938) T TIGR00392 623 FILEGSDQTRGWFYSSLLIGVALFNVGKAPYKNVITHGFTLDEKGRKMSKSLGNVVDPEKVINGDENLKLPKYGADILRL 702 (938) T ss_pred EEEECCCCCCHHHHHHHHHHHHHHCCCCCCCCEEEECCEEECCCCCCCCCCCCCCCCHHHHCCCCCCCCCCCCCCHHHHH T ss_conf 68603355532779999999998707885436345315488577854453258703859970884335887533048777 Q ss_pred HHHHC--CCCCCCCCCCHHHHHHHHHHHHHCC-CCCCCC--CCCCCCCCC--CCCHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 88717--8766554431025677764000001-100000--122444456--7310111278887543689999998898 Q gi|254780445|r 659 WAVNS--DYHDDQRLGKNIIQTNIDTYRKLRN-TIRWML--GMLAHDTGN--EPSLADMPALEQLMLHRLTELDQVVREA 731 (963) Q Consensus 659 ~~~~~--~~~~d~~~~~~~l~~~~~~~~kl~N-t~rf~l--~~l~~~~~~--~~~~~~l~~~DkwiLskl~~~i~~v~~~ 731 (963) T Consensus 703 yv~~~P~~~~~Dl~~~~~~~~~v~~~~~~~~~N~~~Fl~~YanL~~f~p~~~~~~~~~~~~~Drw~L~~l~~l~~~v~~~ 782 (938) T TIGR00392 703 YVASSPSDYWEDLRFSDEILKQVAEKYRKIRWNTYRFLLTYANLDKFDPEEKAVAVEKFRELDRWILSRLNSLVEEVNEA 782 (938) T ss_pred HHHHCCCCCHHCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCHHCCCHHHHHHHHHHHHHHHHHHHH T ss_conf 78846874000220066899999998768899999999998876077873002311203011399999999999999998 Q ss_pred HHHHHHHHHHHHHHHHHHHHCCCCHHHCCCHHHCCCCCCCHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHCCC-- Q ss_conf 765401226688998786302400101020122278998089999999999999999999700044899999986388-- Q gi|254780445|r 732 YDAFNFKEVVRQLTNFSNAELSSFYFDIRKDSLYCDSPSSLKRLSSIAVIRILCRHLIIWIAPILPFTAEEAWLSLNP-- 809 (963) Q Consensus 732 ~e~~~f~~a~~~i~~F~~~dLS~~Yld~~Kdrly~~~~~s~~R~s~~~~L~~il~~l~~lLaPi~P~~aEEiw~~l~~-- 809 (963) T Consensus 783 ~e~Y~f~~~~~~l~~F~~~~LS~wY~~~~rdr~y~~~~~~~~rr~~q~tL~~~l~~l~~~lAP~~Ph~ae~~y~~l~~~~ 862 (938) T TIGR00392 783 LEKYNFHKVLRALQDFIVEELSNWYIRIIRDRLYIEAKDNDKRRAAQTTLYYALLTLVKLLAPILPHTAEEIYQNLKGEK 862 (938) T ss_pred HHCCCHHHHHHHHHHHHHHHCCHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCHHH T ss_conf 62632467888898763120004566665434225789817899999999999999999870115799999986424010 Q ss_pred --------CCCCEEECCCCCCCHHHCCHHHHHH-------HHHHHHHHHHHHHHHHHHHHCCCCCCCCCEEEEEE Q ss_conf --------6773453358899835689899999-------99999999999999999997389997444038998 Q gi|254780445|r 810 --------EAVSVHLELFPIIPLEWQNACLSKK-------WGKILQLRKVVTSALEIERKAKHIGSSLETAPTLY 869 (963) Q Consensus 810 --------~~~SI~~~~wP~~~~~~~d~~le~~-------~~~l~~ir~~V~~~le~~R~~k~I~~slea~v~i~ 869 (963) T Consensus 863 ~~~l~~~~~~~sv~~~~~~~~~~e~~~~~l~~~~~~~~~~~~~~~~~R~~~~~~l~~p~~e~~I~~~~e~~~~~~ 937 (938) T TIGR00392 863 PELLKYEEDEESVHLNDWPEVDEEFIDEALEASMAIVREIVEAFLALRDAANKKLRQPLKELVIGKSLEAVLKAV 937 (938) T ss_pred HHHHCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCHHHHEEC T ss_conf 223002678775023667663145544788888999999999999988999999998874673034665342103

HHsearch alignment for GI: 254780445 and conserved domain: TIGR00392