>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=98.28 E-value=6.4e-07 Score=70.25 Aligned_cols=278 Identities=18% Similarity=0.208 Sum_probs=143.6 Q ss_pred EEE-CCCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEECCCCCCCCHHHHHHHHHCCCCHH--HHHHHHHHHHHHHH Q ss_conf 997-888999988322247897899999999885898036236437022799999998399989--99999999999999 Q gi|255764461|r 8 YIS-TAIAYPNAQPHIGHAYEMIIADVLARFHRLDGLDVLFTTGTDEHGQKIAKAAQNAGVTTK--VFVDQNSRNFRDMA 84 (511) Q Consensus 8 ~vt-~~~Py~ng~lHlGH~~~~i~~D~~~R~~r~~G~~v~~~~g~D~hg~~i~~~A~~~g~~p~--e~~~~~~~~~~~~~ 84 (511) T Consensus 102 VV~RFa-PnPsGpLhiGhArAa~lN~~fa~~--Y~GklIlR~dDTd----------------P~tkr~~~Eayd~i~eDL 162 (600) T TIGR00463 102 VVMRFA-PNPSGPLHIGHARAAILNQYFAKK--YEGKLILRFDDTD----------------PRTKRVKPEAYDMILEDL 162 (600) T ss_pred EEEECC-CCCCCCCCHHHHHHHHHHHHHHHH--CCCCEEEEEECCC----------------CCCCCCCHHHHHHHHHHH T ss_conf 577318-545458752335422320466854--1881799975587----------------887888724665248778 Q ss_pred HHHCCCCCCCCCCCC--HHHHHHHHHHHHHHHHHHCCCCCCHHHHCCCCCCCCCCHHHHCCCCCCCCCCCCCCCEECCCC Q ss_conf 980889886747788--889999999988875431022110001011334301556672111222222223320000345 Q gi|255764461|r 85 DVLDISYDDFIRTTE--KRHHDTCRILWKKISDKGDIYKGCYSGWYSLRDEAYYNDDEVYKGADGQYYNAQHNPVQWMEE 162 (511) Q Consensus 85 ~~~~i~~D~~~rT~~--~~~~~~~~~~~~~l~~~G~iy~~~~~~~y~~~~~~~~~~~~v~~~~~~~~~~~~~~p~~~~~~ 162 (511) T Consensus 163 dwLG~k~Dev~y~Sdr~~~yYd----Y~~kLIe~G~AY~C~-----c~------~Eefre~r~~G~~c~~R~~sve--e- 224 (600) T TIGR00463 163 DWLGVKGDEVVYQSDRIEIYYD----YARKLIEMGKAYVCD-----CS------PEEFRELRNKGVACACRDRSVE--E- 224 (600) T ss_pred HHCCCCEEEEEEEECCHHHHHH----HHHHHHHCCCCEECC-----CC------CHHHHHHHCCCCCCCCCCCCHH--H- T ss_conf 7528420068983053015689----999998669834327-----98------4468886338887777875124--5- Q ss_pred CCCCCCCCCCCCCCCCC-CCCCCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHCC Q ss_conf 44344666444443444-33332100067654577541034567532343337776578642221464602444322001 Q gi|255764461|r 163 EGYFFRLSAYQDKLLSY-YESHPEFILPIERRNEVISFVKSGLKDLSLSRKTFDWGIKIPDDPQYIMYVWIDALTNYLTT 241 (511) Q Consensus 163 ~~~f~~l~~~~~~l~~~-~~~~~~~~~p~~~~~~~~~wl~~gl~Dw~ISR~~~~WGipiP~~~~~~~YVWfDa~~gY~s~ 241 (511) T Consensus 225 -----nL~~wte~M~~G~~E~~~~~v---R~KtD-~~h~npaiRD~v~fR~~-~~~HprtG~~-Y~vYP~~--------- 284 (600) T TIGR00463 225 -----NLEIWTEEMLEGEEEEGKVVV---RVKTD-LKHKNPAIRDWVIFRIV-KTPHPRTGDK-YKVYPTM--------- 284 (600) T ss_pred -----HHHHHHHHHCCCCCCCCCEEE---EEEEC-CCCCCCCCCCCCEEEEE-CCCCCCCCCC-EEECCCC--------- T ss_conf -----788999871577301660289---98713-67887863476135777-5788886882-2681222--------- Q ss_pred CCCCCCCCCCCCCCCCCCHHCC-------CCCCCCH--HCCHHHHHHHHHHHHCCCCCCCCCCEEECCC-CCCHH-HCCC Q ss_conf 2346765431000241100004-------5643210--0010247765433101232333430330586-01000-0022 Q gi|255764461|r 242 TGYLDNPDGSKAKFWPADLHVI-------GKDILRF--HAIYWPAFLLSANLPLPKKVFSHGFILHKGE-KISKS-LGNV 310 (511) Q Consensus 242 ~~~~~~~~~~~~~~w~~d~~~~-------G~Dii~F--h~i~~pa~l~~~~~~~p~~i~~~g~l~~~G~-KMSKS-~GN~ 310 (511) T Consensus 285 ---------dF~v--ai~DhllGvTH~LRgkd~~~n~~~q~Y---~Y~y~gw~~p~-~~hyg~~ki~~v~~Lsts~~~~~ 349 (600) T TIGR00463 285 ---------DFSV--AIDDHLLGVTHVLRGKDHIDNERKQQY---IYKYFGWELPE-FIHYGRLKINDVRTLSTSSIKKG 349 (600) T ss_pred ---------CCCC--HHHHHCCCCHHHHHHHHHHHHHHHHHH---HHHHHCCCCCC-EEEEEEEEHHHHHHHHHHHHHHH T ss_conf ---------6654--243210232032310245521267889---99983223880-23441155113323210345411 Q ss_pred CCCCCH--------------HH--HCCCCCCCHHHEEECCCCCCCEECCCCCCCCHHHHHHHHH Q ss_conf 111000--------------00--0221112111000024787301112221110013321102 Q gi|255764461|r 311 IDPIEV--------------IE--EVGVDALRYFLVREIACGKDGFYDKDGLKKRVNADLANGI 358 (511) Q Consensus 311 I~~~e~--------------l~--~~g~D~lR~~l~~~~~~~~D~~Fs~~~~~~~~n~~L~~~l 358 (511) T Consensus 350 i~~g~y~GnWDDpRLpTlRa~rRRG~~pEai~~~~~~~G~~~nd~~~sw~~lYA-~Nk~~id~~ 412 (600) T TIGR00463 350 IVRGDYSGNWDDPRLPTLRAVRRRGIKPEAIREFMLSIGVKRNDVKLSWKNLYA-LNKKIIDKK 412 (600) T ss_pred HHCCCCCCCCCCCCCCHHHHHHCCCCCHHHHHHHHHHCCCCEEEEEEEHHHHHH-HHHHHCCCC T ss_conf 012651246568886302332117881578999999719961244312567766-235540324

HHsearch alignment for GI: 255764461 and conserved domain: TIGR00463