>TIGR00234 tyrS tyrosyl-tRNA synthetase; InterPro: IPR002307 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 . Tyrosyl-tRNA synthetase (6.1.1.1 from EC) is an alpha2 dimer that belongs to class Ib. Studies on tyrosyl-tRNA synthetase provide the first kinetic evidence that the 'KMSKS' motif plays a role in the initial binding of tRNA(Tyr) to tyrosyl-tRNA synthetase .; GO: 0000166 nucleotide binding, 0004831 tyrosine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006437 tyrosyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=554.86 Aligned_cols=407 Identities=39% Similarity=0.658 Sum_probs=383.9 Q ss_pred HHHHHHHHHHCCCHHHCCC-HHHHHHHHH---CCCEEEEEEECCCCCCCCHHHHHHHHHHHHHHHCCCEEEEEEECHHHC Q ss_conf 6799999996892002299-899999851---498189998437876202434899999999998598499998260111 Q gi|254780949|r 5 KSDFLSILSERGFIHQISN-PRELDILCS---QGVVTAYIGYDLTASSLHAGHLTQLMLLFWLQKTGHKPISLMGGGTSI 80 (418) Q Consensus 5 ~~~~~~~L~~Rg~i~~~~~-~~~l~~~l~---~~~~~~y~G~DpT~~slH~G~l~~~~~l~~~q~~Gh~~i~liG~~T~~ 80 (418) T Consensus 3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~g~~p~~~~~h~g~~~~~~~~~~~~~~g~~~~~~~g~~~~~ 82 (422) T TIGR00234 3 LTNLLLLLKKRGLEEQLPEELEELLKLLKKYTNEPLKLYLGFDPTAPSLHLGHLVPLLKLRDFQEAGHEPVVLLGDATAL 82 (422) T ss_pred HHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHCCCCCEEEECCCCCCCCCCCCHHHHHHHHHHHHHCCCEEEEEEECCCCC T ss_conf 15678888753345531225788998864311455147850467776421113689999999986398079986042000 Q ss_pred CCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCEEEEHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 44889886210246889999999999999887653267776402330167523431346888752234478753478888 Q gi|254780949|r 81 IGDPSFRDESRRMMRSQEIQENIEKIKGIFSSFIKYGTGKTDALMLNNETWLCSIKYIDLLREIGSFFSVNRMLSFESVR 160 (418) Q Consensus 81 IGDPsgk~~~R~~l~~~~i~~n~~~~~~q~~~~~~~~~~~~~~~i~~N~~W~~~~~~~~~lr~~g~~~~v~~mL~rd~v~ 160 (418) T Consensus 83 ~g~p~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-~-~~~~~~~~~w~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 160 (422) T TIGR00234 83 LGDPSGKSELRKLLTREEVLENAETIKKQLARFLDFDV-P-KAKFVNNSEWLLKLNYLDFLRDLGKHFSVNRMLARDAFS 160 (422) T ss_pred CCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCC-C-CCEEEECCHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 26754045676443367787888888998876406554-4-303430511210230688999886545588877655677 Q ss_pred HHCCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCEECCCCHHHHHHHHHHHHHHHCCCC--CEEEEEECEEECCCCHHHH Q ss_conf 74035688315788989898999999985429702015412588998889999731679--7179831102368710223 Q gi|254780949|r 161 SRLKREQSLSFLEFNYMILQAYDFVELAKNYDCRLQMGGSDQWGNIICGIDLGERLKTP--KLFALTSPLLTTASGTKMG 238 (418) Q Consensus 161 ~Rl~~~~~is~~EF~Y~llQayD~~~L~~~~~~~iqiGGsDQwgNi~~G~eLir~~~~~--~~~glT~PLLt~~dG~Kmg 238 (418) T Consensus 161 ~~~~~~-~~~~~~~~y~~~~~~d~~~l~~~~~~~~~~gg~d~~~~~~~g~~l~~~~~~~~~~~~~~~~~~~~~~~g~~~g 239 (422) T TIGR00234 161 SRLEEN-GLSLSEFIYPLLQGYDFYYLGKDKNVDLQLGGSDQWGNILAGRDLARRKLPSLGEQFGLTVPLLTPADGEKMG 239 (422) T ss_pred HHHHCC-CCHHHHHHHHHHHHHHHHHHCCCCCCEEEECCCCCHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCCCCC T ss_conf 665216-7403567777887543443101335237755764102478889998863000121000011000155642024 Q ss_pred HHHHCCCCCCCCCCCHHHHHHHHHHHCHHHHHHHHHHHCCCCHHHHHHHHHHH---HCCCCHHHHHHHHHHHHHHHHHCH Q ss_conf 54310123334579979999988620788898799750688856755543332---102202688989999997300000 Q gi|254780949|r 239 KTLSGAIWLNKEMTSPYNFWQYWRNIDDADVVSFAKRLTTLPMSEIDRMAKLQ---GKEINEAKKIIATEITTMVHGREE 315 (418) Q Consensus 239 KS~~naIwLd~~~tSPy~fyQf~~n~~D~dV~kyLklfT~l~l~EI~~l~~~~---~~~pr~aKk~LA~EiT~lvHGe~~ 315 (418) T Consensus 240 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 319 (422) T TIGR00234 240 KSGGGAVGLDEGKTSPYDFYQFWLNTPDELLKKYLKLFTFLGLEEIEALKELKENGGPSPREAKELLALEITKLVHGPEA 319 (422) T ss_pred CCCCCCEECCCCCCCHHHHHHHHHCCCHHHHHHHHHHHHCCCHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHH T ss_conf 44455100254333134555654145367899999875035666888887554204554135677789999998630356 Q ss_pred HHHHHHHHHHHCCCCCCCCCCCCEECCHHHHCCCCCHHHHHHHCCCCCCHHHHHHHHHCCCEEECCEEECCCCCEECHHH Q ss_conf 46799986431025764225771030777821699889999984997886899999876987988798048000237777 Q gi|254780949|r 316 AEKAATAAMECFDMSIHSQHMPTISISKDEVSRGMGLLTLIVKAGFATSTNEARRHLKSNAIKINNSIISNEKLQIKLQD 395 (418) Q Consensus 316 a~~A~~~s~~lF~~~~~~~~lp~~~i~~~~i~~~~~l~dlL~~~gL~~SksEARRlI~qGgV~IN~~kI~d~~~~i~~~d 395 (418) T Consensus 320 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--~~~~~~~~~~~~~~~~~~~~~~~~~~~~g~~~~~~~~~~~~~~~~~~~~ 397 (422) T TIGR00234 320 ALAAEELSEALFSGNLLPDELPEFRLEKG--GGPLGLVDLLVDSGLVPSKSEARRDLKNGGVYINGEKVEDLEPILKKLD 397 (422) T ss_pred HHHHHHHHHHHHHCCCCCCCHHHHHHHCC--CCCHHHHHHHHHHHCCCCHHHHHHHHHCCCEEECHHHHHHHHHHHHHHH T ss_conf 67788888887630344210011111014--5413678888876302320222344410440330245545677765444 Q ss_pred HC---CCCEEEEEECCEEEEEEEE Q ss_conf 14---7976999777854899997 Q gi|254780949|r 396 FD---STGNIKLSFGKKNHIICHL 416 (418) Q Consensus 396 ~~---~~~~liLr~GKK~~~lI~i 416 (418) T Consensus 398 ~~~~~~~~~~~~~~g~~~~~~~~~ 421 (422) T TIGR00234 398 RNFLKDNGNLVLRVGKKKFLRLTL 421 (422) T ss_pred HHHHHHCCCCEEEECCCEEEEEEE T ss_conf 443320121000103110255440

HHsearch alignment for GI: 254780949 and conserved domain: TIGR00234