HHsearch alignment for GI: 254780794 and conserved domain: TIGR00464

>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=96.79  E-value=0.0064  Score=39.70  Aligned_cols=89  Identities=19%  Similarity=0.157  Sum_probs=54.5

Q ss_pred             CCCCCCHHHHHHHHHHHHHHHHHCCCCEEEE-EEEHHHHCCCCCHHHHHHHHHHHHHHHHH-CCCCCCCC-------EEE
Q ss_conf             8967810557988999999985059958999-73115730789858999999999999996-28681112-------365
Q gi|254780794|r   14 PTGVLHLGNYLGMIRNVIRRQETCNHLGMYF-IADLHAITNNIVQENLRYQSRLFVASFLA-AGVDPSRN-------IIF   84 (355)
Q Consensus        14 PtG~~HLG~y~g~i~~~i~lq~~~~~~~~~~-IAD~halt~~~~~~~~~~~~~~~~~~~lA-~Gldp~k~-------~if   84 (355)
T Consensus        10 PTG~LHiGg~RTAlFNyLfAr~~~G--~F~lRiED----TD---~eR~~~e~~~~i~e~LkWlGi~wDEs~~~gG~Y~Py   80 (513)
T TIGR00464        10 PTGYLHIGGARTALFNYLFARHTGG--KFILRIED----TD---LERNIEEAEESILEGLKWLGISWDESVYVGGNYGPY   80 (513)
T ss_pred             CCCCCCHHHHHHHHHHHHHHHHCCC--CEEEEEEE----CC---CCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCCEEE
T ss_conf             8754353368999999999986389--37998753----67---100724468999988874586746675689863011


Q ss_pred             ECCCHHHHHHHH-H-H------HHHCCCHHHHHHC
Q ss_conf             247407889999-9-9------8510536775201
Q gi|254780794|r   85 KQSDVGYHADLS-W-I------LSCVARMGWMNNM  111 (355)
Q Consensus        85 ~QS~v~e~~eL~-~-~------l~~~~~~~~l~r~  111 (355)
T Consensus        81 ~QS~R~~~Y~~~~~~Ll~~g~AYrCYCs~E~LE~~  115 (513)
T TIGR00464        81 YQSQRLDIYKKYIKELLEEGLAYRCYCSKEELERL  115 (513)
T ss_pred             HHHHHHHHHHHHHHHHHHCCCCEEEECCHHHHHHH
T ss_conf             10136789999999997459934422784678899