>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=99.31 E-value=4.4e-10 Score=89.67 Aligned_cols=374 Identities=21% Similarity=0.254 Sum_probs=197.2 Q ss_pred CCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCEEECCCCCC--HHH----HHHHHHHHHHHHHHCCCCCCCCCHHHCC Q ss_conf 4432244117777785689999999985066641020147753--145----5567898753222102450006601102 Q gi|254780285|r 129 SANPTGPMHVGHCRCAVVGDTLASLMAFSGYEVTREYYINDAG--AQI----NTLALSVFWRYQQALYNNDSDLPEGYYP 202 (586) Q Consensus 129 SpNp~KplHVGHlRsaiIGdsi~ril~~~G~~V~r~nyvgD~G--~Q~----~~li~~~~~~~~~~~~~~~~~~~e~~~~ 202 (586) T Consensus 7 APSPTG~LHiGg~RTAlFNyLfAr~~--~G~F~lR---iEDTD~eR~~~e~~~~i~e~LkWlGi~--wDEs~~~gG~--Y 77 (513) T TIGR00464 7 APSPTGYLHIGGARTALFNYLFARHT--GGKFILR---IEDTDLERNIEEAEESILEGLKWLGIS--WDESVYVGGN--Y 77 (513) T ss_pred CCCCCCCCCHHHHHHHHHHHHHHHHC--CCCEEEE---EEECCCCCCCHHHHHHHHHHHHHCCCC--CCCCCCCCCC--C T ss_conf 38887543533689999999999863--8937998---753671007244689999888745867--4667568986--3 Q ss_pred CCCHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHH-HHHHHCCCCCCCEECHHHHHHCCHHHHHHHHHHHH Q ss_conf 41000012788888757641343023799999997899887545-55887087521000158873010457999999999 Q gi|254780285|r 203 GVYLKHVGKELADKYSSELLNFPEEKWLPIVKDYSVQAMMKIIR-DDLKALNIQHDIFISEDDFHRGDPSPIRDIIDNLA 281 (586) Q Consensus 203 ~~y~~~~~~e~~~~~~~~~~~~~e~~~~~~~~~~~~~~~~~~~~-~~l~~l~i~fD~~~~Es~~~~~~~~~i~~~i~~l~ 281 (586) T Consensus 78 ~Py~QS~R~~~Y~~~~~~Ll~~g~A-----YrCYCs~E~LE~~Rke~~q~~~~~~PrYd~~c------r~l~~~~~~~~l 146 (513) T TIGR00464 78 GPYYQSQRLDIYKKYIKELLEEGLA-----YRCYCSKEELERLRKEEIQKANKETPRYDGRC------RNLHEEEIENKL 146 (513) T ss_pred EEEHHHHHHHHHHHHHHHHHHCCCC-----EEEECCHHHHHHHHHHHHHHHCCCCCCCCCCC------CCCCCHHHHHHH T ss_conf 0111013678999999999745993-----44227846788998999997088534837533------478713788764 Q ss_pred HCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEHHHCCCC---CCCCCCCCC-------CCHHHHHHHHHHHHHHHHCCCCC Q ss_conf 74985113426755565420002478156510110222---222210246-------52135688899999975225554 Q gi|254780285|r 282 RQGYVYEGILPPPKSKTTQKCDMDRKQLLFRSTMVGDD---VDRPLLKSD-------GSYTYFAADLAYFKCKYERGFDN 351 (586) Q Consensus 282 ~~g~~~e~~~~~~~~~~~~~~~~~~~~~~~~~~~~g~~---~d~vl~rsD-------Gt~~Y~t~DiA~~~~k~e~~~d~ 351 (586) T Consensus 147 ~~~~~pvvRfK~P~~~~~~F~D~v~G~i~~~~~~l~~dkrydD~vi~k~DenPeeafG~PTY--------------NfAv 212 (513) T TIGR00464 147 AKGIPPVVRFKIPQEAEISFNDQVRGEITFEGSELDNDKRYDDLVILKSDENPEEAFGSPTY--------------NFAV 212 (513) T ss_pred HCCCCCEEEEECCCCCCEEECCEEEEEEEECCCCCCCCCCCCCEEEEECCCCHHHHCCCCCC--------------CEEE T ss_conf 43799668874079984245050221588558667866441561264068883221488642--------------5067 Q ss_pred CCC---------CCCCCH-HHHHHHHHHHHHHHCCC-CCCCEEEECCHHHCCCCCCCCCCCCCCC-CHHHHHHHHHH--- Q ss_conf 333---------677761-36899999999972266-3451153110110122110000012233-02456777776--- Q gi|254780285|r 352 MIY---------VMGSDH-SGYVKRLEAVAAAVSEK-KAQINVLLCELVRLYRDGMPIKMSKRAG-DFITLRHVVDE--- 416 (586) Q Consensus 352 ~iy---------Vv~~~Q-~~h~~~v~~~~~~lg~~-~~~~~~~~~~~v~l~~dg~~~kmstR~G-~~v~l~dll~e--- 416 (586) T Consensus 213 vvDD~lM~IThViRGedHisNTPkQI-~iy~Alg~~~iP~f~H~p~--I-~~~~gK--KLSKRdg~~~~si~q~~~~GyL 286 (513) T TIGR00464 213 VVDDYLMKITHVIRGEDHISNTPKQI-LIYKALGWKRIPTFAHLPL--I-LNEDGK--KLSKRDGKTATSIEQFKEQGYL 286 (513) T ss_pred EEECCCCCCCEEEECCHHHCCCHHHH-HHHHHCCCCCCCCEEEEEE--E-ECCCCC--EEECCCCHHHHHHHHHHHCCCC T ss_conf 88533255451441202006718999-9999708898881553535--8-569884--0012064025768999866887 Q ss_pred ------------------H---------HHHHHHHHHHHHCCHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHH Q ss_conf ------------------3---------2112345554200012333447776532024436788888888999987533 Q gi|254780285|r 417 ------------------V---------GSDSVRFMMLWRKNSELLDFDFCKVKEQSKENPVFYVQYAYARCRSIFRQAK 469 (586) Q Consensus 417 ------------------v---------g~~aiky~~L~~~~~~~~~Fd~d~~l~~~~~nt~~YiqYa~aR~~SIlrKa~ 469 (586) T Consensus 287 PEAl~Nyl~lLGW~~~~dlas~~~E~Fs~~elie~F~l~~~~kspA~Fd~~KL~w~N~~----Ylk---~riL~~~~l~~ 359 (513) T TIGR00464 287 PEALINYLALLGWSPPDDLASKDQEIFSLEELIEIFSLNRLSKSPAKFDIKKLKWLNAH----YLK---ERILPDEELLE 359 (513) T ss_pred HHHHHHHHHHHCCCCCCCCCCCCCCCCCHHHHHHCCCCCCCCCCCCCCCHHHHHHHHHH----HHH---HHCCCHHHHHH T ss_conf 78999999984689652334465663677999820681102221012444899999999----998---64489989998 Q ss_pred HHCCCCCCCCCCC-CCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCC Q ss_conf 2002468322342-235521149989999999984218999999985281279999999999889998706866666543 Q gi|254780285|r 470 DIFPDLDFDLFPR-NVIPQESEFDTSELQLIVHLAEYPRVIENATIAQEPYKLAFYLYDLASVFHGHWSHGRENPRLRFV 548 (586) Q Consensus 470 ~~~~~~~~~~~~~-~~~~~~~~~~~~E~~L~~~l~~f~~vi~~a~~~~~P~~l~~Yl~~La~~Fn~fY~~~~~~~~~~v~ 548 (586) T Consensus 360 ----ll~~~~~~~~~~~~~~~~~~~q~w-L~~l~~l~-------------~~~~~~l~e~~~~~~~ff~~~--------~ 413 (513) T TIGR00464 360 ----LLDPHLKKKESVVKTSTLNEEQEW-LKELLLLL-------------KERLKTLKELAELIRLFFEDK--------K 413 (513) T ss_pred ----HHHHHHHCCCCEECCCCCCCHHHH-HHHHHHHH-------------HHHHHHHHHHHHHHHHHHCCH--------H T ss_conf ----876775406831025566405789-99999986-------------566778999999999860343--------6 Q ss_pred CCCCHHHHHHHHHHHHHHHHHHHHHHHHC Q ss_conf 57878999999999999999999987315 Q gi|254780285|r 549 QANNRKLTMMRLQLVHAVASIINSGLNII 577 (586) Q Consensus 549 ~~~~~~~~~~RL~L~~a~~~vL~~~L~LL 577 (586) T Consensus 414 ~~~~~~~-~~~-~~~~~~~~~L~~~~~~L 440 (513) T TIGR00464 414 EVDEDAK-KKL-EKFKNVKEVLEALKKKL 440 (513) T ss_pred HHHHHHH-HHH-HHHHHHHHHHHHHHHHH T ss_conf 7656899-889-98898999999999997

HHsearch alignment for GI: 254780285 and conserved domain: TIGR00464