>TIGR00463 gltX_arch glutamyl-tRNA synthetase; InterPro: IPR004526 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 . Glutamyl-tRNA synthetase (6.1.1.17 from EC) is a class Ic synthetase and shows several similarities with glutaminyl-tRNA synthetase concerning structure and catalytic properties. It is an alpha2 dimer. To date one crystal structure of a glutamyl-tRNA synthetase (Thermus thermophilus) has been solved. The molecule has the form of a bent cylinder and consists of four domains. The N-terminal half (domains 1 and 2) contains the 'Rossman fold' typical for class I synthetases and resembles the corresponding part of E. coli GlnRS, whereas the C-terminal half exhibits a GluRS-specific structure . ; GO: 0000166 nucleotide binding, 0004818 glutamate-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006424 glutamyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=485.86 Aligned_cols=289 Identities=31% Similarity=0.513 Sum_probs=237.9 Q ss_pred CCEEEECCCCCCCCCCHHHHHHHHHHHHHHHHCCCEEEEEECCCCCC--CCCHHHHHHHHHHHHHCCCCCCCCCCCCCCC Q ss_conf 77056348433887850159999999999997188499997048666--3886799999999886589888676558876 Q gi|255764513|r 5 SKVRVRIAPSPTGEPHIGTAYTALFNYLIAKRTGGKFILRIEDTDSK--RSTLESENAVMQSLKWCGLNWDEGPDIGGAY 82 (492) Q Consensus 5 ~~v~~RfaPsPtG~lH~G~~rtal~n~l~a~~~~g~f~lRieDtd~~--R~~~~~~~~i~~~l~wlgl~~De~~~~~g~~ 82 (492) T Consensus 100 G~VV~RFaPnPsGpLhiGhArAa~lN~~fa~~Y~GklIlR~dDTdP~tkr~~~Eayd~i~eDLdwLG~k~Dev------- 172 (600) T TIGR00463 100 GEVVMRFAPNPSGPLHIGHARAAILNQYFAKKYEGKLILRFDDTDPRTKRVKPEAYDMILEDLDWLGVKGDEV------- 172 (600) T ss_pred CCEEEECCCCCCCCCCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCCCHHHHHHHHHHHHHCCCCEEEE------- T ss_conf 7357731854545875233542232046685418817999755878878887246652487787528420068------- Q ss_pred CCEECCCCHHHHHHHHHHHHHCCCEEECCCCHHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHH----H----CCCC Q ss_conf 7632326289999999999988982451488999776688766431000236655578833300112----0----2577 Q gi|255764513|r 83 GPYRQSERKNIYQPYVQNLLEKKLAFRCFCSTERLEEMRRAQRKRNIPSRYDGHCLKLSSQEIERLS----Q----EQKK 154 (492) Q Consensus 83 ~p~~QS~r~~~y~~~~~~L~~~g~aY~c~~t~eel~~~r~~~~~~~~~~~Y~~~~r~l~~~e~~~~~----~----~g~~ 154 (492) T Consensus 173 --~y~Sdr~~~yYdY~~kLIe~G~AY~C~c~~Eefre~r~~----G~----~c~~R~~sveenL~~wte~M~~G~~E~~~ 242 (600) T TIGR00463 173 --VYQSDRIEIYYDYARKLIEMGKAYVCDCSPEEFRELRNK----GV----ACACRDRSVEENLEIWTEEMLEGEEEEGK 242 (600) T ss_pred --EEEECCHHHHHHHHHHHHHCCCCEECCCCCHHHHHHHCC----CC----CCCCCCCCHHHHHHHHHHHHCCCCCCCCC T ss_conf --983053015689999998669834327984468886338----88----77778751245788999871577301660 Q ss_pred CEEEEEECCCCEEECCCCCCCCEECCCCCCCCCCEECCCC------------CHHHHHHHHHHHHHHHHHHHHCCCCCCC Q ss_conf 4078862243114304751340213643235641000453------------2489867887644444443112235430 Q gi|255764513|r 155 HVVRLTVPNQGSCVFQDKVYGEMEIPWNAVDMQVLLKSDG------------MPTYHLANVIDDHLMKITHVARGEEWIS 222 (492) Q Consensus 155 ~~iR~k~p~~~~~~~~D~i~G~~~~~~~~~~D~vi~r~dg------------~ptY~~a~vvDD~~m~ithviRg~d~~~ 222 (492) T Consensus 243 ~~vR~KtD~--------------~h~npaiRD~v~fR~~~~~HprtG~~Y~vYP~~dF~vai~DhllGvTH~LRgkd~~~ 308 (600) T TIGR00463 243 VVVRVKTDL--------------KHKNPAIRDWVIFRIVKTPHPRTGDKYKVYPTMDFSVAIDDHLLGVTHVLRGKDHID 308 (600) T ss_pred EEEEEEECC--------------CCCCCCCCCCCEEEEECCCCCCCCCCEEECCCCCCCCHHHHHCCCCHHHHHHHHHHH T ss_conf 289987136--------------788786347613577757888868822681222665424321023203231024552 Q ss_pred HHHHHHHHHHHHHHCCCHHHHHHHHHHHHCCCC--------------CC-CCCC--CCHHHHHHCCCCHHHHHHHHHHCC Q ss_conf 247889999985100000101455531101322--------------12-2343--302456662977377998998506 Q gi|255764513|r 223 SVPKHILLYQYFNFPIPEFIHLPLIKNPDKSKL--------------SK-RRNP--TSISYYSAMGYLPEALINFLALLF 285 (492) Q Consensus 223 ~t~~q~~l~~al~~~~p~f~H~pli~~~~g~kl--------------SK-R~~~--~~i~~~~~~GylPeAilNyLalLG 285 (492) T Consensus 309 n~~~q~Y~Y~y~gw~~p~~~hyg~~ki~~v~~Lsts~~~~~i~~g~y~GnWDDpRLpTlRa~rRRG~~pEai~~~~~~~G 388 (600) T TIGR00463 309 NERKQQYIYKYFGWELPEFIHYGRLKINDVRTLSTSSIKKGIVRGDYSGNWDDPRLPTLRAVRRRGIKPEAIREFMLSIG 388 (600) T ss_pred HHHHHHHHHHHHCCCCCCEEEEEEEEHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCHHHHHHCCCCCHHHHHHHHHHCC T ss_conf 12678899998322388023441155113323210345411012651246568886302332117881578999999719 Q ss_pred CCCCCCCHHHCCHHHHHHHHHHHHC----CCCCCCCHHHHHHHHHHH Q ss_conf 7666553011014677765202113----755442015655664355 Q gi|255764513|r 286 VHKSEDDDELMDMQQLIHHFDLHHL----SKAGAVFDKQKLDWLNGR 328 (492) Q Consensus 286 ws~~~~d~Eifsl~eli~~FdL~~I----~Ks~A~FD~eKL~wlN~q 328 (492) T Consensus 389 ~~~--nd~~-~sw~~lYA-~Nk~~id~~A~Ryffi~~PvKl~~~gse 431 (600) T TIGR00463 389 VKR--NDVK-LSWKNLYA-LNKKIIDKKARRYFFIWNPVKLEIEGSE 431 (600) T ss_pred CCE--EEEE-EEHHHHHH-HHHHHCCCCCCCEEEEECCEEEEEECCC T ss_conf 961--2443-12567766-2355403246803888888899985676

HHsearch alignment for GI: 255764513 and conserved domain: TIGR00463