>TIGR00464 gltX_bact glutamyl-tRNA synthetase; InterPro: IPR004527 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=99.10 E-value=7.4e-09 Score=84.57 Aligned_cols=270 Identities=20% Similarity=0.240 Sum_probs=147.4 Q ss_pred CCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEECCCCCCCCHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHCCCCCC Q ss_conf 99998832224789789999999988589803623643702279999999839998999999999999999980889886 Q gi|255764461|r 14 AYPNAQPHIGHAYEMIIADVLARFHRLDGLDVLFTTGTDEHGQKIAKAAQNAGVTTKVFVDQNSRNFRDMADVLDISYDD 93 (511) Q Consensus 14 Py~ng~lHlGH~~~~i~~D~~~R~~r~~G~~v~~~~g~D~hg~~i~~~A~~~g~~p~e~~~~~~~~~~~~~~~~~i~~D~ 93 (511) T Consensus 8 PSPTG~LHiGg~RTAlFNyLfAr~--~~G~F~lRiEDTD~----------------eR~~~e~~~~i~e~LkWlGi~wDE 69 (513) T TIGR00464 8 PSPTGYLHIGGARTALFNYLFARH--TGGKFILRIEDTDL----------------ERNIEEAEESILEGLKWLGISWDE 69 (513) T ss_pred CCCCCCCCHHHHHHHHHHHHHHHH--CCCCEEEEEEECCC----------------CCCCHHHHHHHHHHHHHCCCCCCC T ss_conf 888754353368999999999986--38937998753671----------------007244689999888745867466 Q ss_pred -------C---CCCCCHHHHHHHHHHHHHHHHHHCCCCCCHHHHCCCCCCC-CCC-HH-HHCCCCCCCCCCCCCCCEE-- Q ss_conf -------7---4778888999999998887543102211000101133430-155-66-7211122222222332000-- Q gi|255764461|r 94 -------F---IRTTEKRHHDTCRILWKKISDKGDIYKGCYSGWYSLRDEA-YYN-DD-EVYKGADGQYYNAQHNPVQ-- 158 (511) Q Consensus 94 -------~---~rT~~~~~~~~~~~~~~~l~~~G~iy~~~~~~~y~~~~~~-~~~-~~-~v~~~~~~~~~~~~~~p~~-- 158 (511) T Consensus 70 s~~~gG~Y~Py~QS~R---~~~Y~~~~~~Ll~~g~AYrC-----YCs~E~LE~~Rke~~q~~~~~~PrYd~~cr~l~~~~ 141 (513) T TIGR00464 70 SVYVGGNYGPYYQSQR---LDIYKKYIKELLEEGLAYRC-----YCSKEELERLRKEEIQKANKETPRYDGRCRNLHEEE 141 (513) T ss_pred CCCCCCCCEEEHHHHH---HHHHHHHHHHHHHCCCCEEE-----ECCHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCHH T ss_conf 7568986301110136---78999999999745993442-----278467889989999970885348375334787137 Q ss_pred ---CCCC-CCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHCCCCCC------CCCCCCCC----CCCCCCCCCCC Q ss_conf ---0345-4434466644444344433332100067654577541034567------53234333----77765786422 Q gi|255764461|r 159 ---WMEE-EGYFFRLSAYQDKLLSYYESHPEFILPIERRNEVISFVKSGLK------DLSLSRKT----FDWGIKIPDDP 224 (511) Q Consensus 159 ---~~~~-~~~f~~l~~~~~~l~~~~~~~~~~~~p~~~~~~~~~wl~~gl~------Dw~ISR~~----~~WGipiP~~~ 224 (511) T Consensus 142 ~~~~l~~~~~pvvRfK~P~~~---------~~~F~D~v~G~i~-~~~~~l~~dkrydD~vi~k~DenPeeafG~PTYNfA 211 (513) T TIGR00464 142 IENKLAKGIPPVVRFKIPQEA---------EISFNDQVRGEIT-FEGSELDNDKRYDDLVILKSDENPEEAFGSPTYNFA 211 (513) T ss_pred HHHHHHCCCCCEEEEECCCCC---------CEEECCEEEEEEE-ECCCCCCCCCCCCCEEEEECCCCHHHHCCCCCCCEE T ss_conf 887644379966887407998---------4245050221588-558667866441561264068883221488642506 Q ss_pred CCCCCCCHHHHHHHHCCCCCCCCCCCCCCCCCCCCHHCC-CCC---CCCHHCCHHHHHHHHHHHH-CCCCCCCCCCEE-E Q ss_conf 214646024443220012346765431000241100004-564---3210001024776543310-123233343033-0 Q gi|255764461|r 225 QYIMYVWIDALTNYLTTTGYLDNPDGSKAKFWPADLHVI-GKD---ILRFHAIYWPAFLLSANLP-LPKKVFSHGFIL-H 298 (511) Q Consensus 225 ~~~~YVWfDa~~gY~s~~~~~~~~~~~~~~~w~~d~~~~-G~D---ii~Fh~i~~pa~l~~~~~~-~p~~i~~~g~l~-~ 298 (511) T Consensus 212 v-vvD---D~lM~-I--------------------ThViRGedHisNTPkQ----I~iy~Alg~~~iP~f~H~p-~I~~~ 261 (513) T TIGR00464 212 V-VVD---DYLMK-I--------------------THVIRGEDHISNTPKQ----ILIYKALGWKRIPTFAHLP-LILNE 261 (513) T ss_pred E-EEE---CCCCC-C--------------------CEEEECCHHHCCCHHH----HHHHHHCCCCCCCCEEEEE-EEECC T ss_conf 7-885---33255-4--------------------5144120200671899----9999970889888155353-58569 Q ss_pred CCCCCCHHHC-CCCCCCCHHHH-CCCCCCCHHHEEECCCCC-------CCEECCCCCCCC Q ss_conf 5860100000-22111000000-221112111000024787-------301112221110 Q gi|255764461|r 299 KGEKISKSLG-NVIDPIEVIEE-VGVDALRYFLVREIACGK-------DGFYDKDGLKKR 349 (511) Q Consensus 299 ~G~KMSKS~G-N~I~~~e~l~~-~g~D~lR~~l~~~~~~~~-------D~~Fs~~~~~~~ 349 (511) T Consensus 262 ~gKKLSKRdg~~~~si~q~~~~GyLPEAl~Nyl~lLGW~~~~dlas~~~E~Fs~~elie~ 321 (513) T TIGR00464 262 DGKKLSKRDGKTATSIEQFKEQGYLPEALINYLALLGWSPPDDLASKDQEIFSLEELIEI 321 (513) T ss_pred CCCEEECCCCHHHHHHHHHHHCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCCHHHHHHC T ss_conf 884001206402576899986688778999999984689652334465663677999820

HHsearch alignment for GI: 255764461 and conserved domain: TIGR00464