HHsearch alignment for GI: 254780285 and conserved domain: TIGR00463

>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=97.29  E-value=8.7e-05  Score=52.54  Aligned_cols=98  Identities=29%  Similarity=0.490  Sum_probs=63.3

Q ss_pred             CCEECCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCEEECCCCCCHHHHHHHHHHHHHHHHHCCCCCCCCCHHH
Q ss_conf             41000223443224411777778568999999998506664102014775314555678987532221024500066011
Q gi|254780285|r  121 TKVNIEFVSANPTGPMHVGHCRCAVVGDTLASLMAFSGYEVTREYYINDAGAQINTLALSVFWRYQQALYNNDSDLPEGY  200 (586)
Q Consensus       121 ~kVvVE~sSpNp~KplHVGHlRsaiIGdsi~ril~~~G~~V~r~nyvgD~G~Q~~~li~~~~~~~~~~~~~~~~~~~e~~  200 (586)
T Consensus       100 G~VV~RF-aPnPsGpLhiGhArAa~lN~~fa~~Y~-------------------GklI----------lR~dDTd-P~t-  147 (600)
T TIGR00463       100 GEVVMRF-APNPSGPLHIGHARAAILNQYFAKKYE-------------------GKLI----------LRFDDTD-PRT-  147 (600)
T ss_pred             CCEEEEC-CCCCCCCCCHHHHHHHHHHHHHHHHCC-------------------CCEE----------EEEECCC-CCC-
T ss_conf             7357731-854545875233542232046685418-------------------8179----------9975587-887-


Q ss_pred             CCCCCHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCEECHHHHHHCCHHHHHHHHHHH
Q ss_conf             02410000127888887576413430237999999978998875455588708752100015887301045799999999
Q gi|254780285|r  201 YPGVYLKHVGKELADKYSSELLNFPEEKWLPIVKDYSVQAMMKIIRDDLKALNIQHDIFISEDDFHRGDPSPIRDIIDNL  280 (586)
Q Consensus       201 ~~~~y~~~~~~e~~~~~~~~~~~~~e~~~~~~~~~~~~~~~~~~~~~~l~~l~i~fD~~~~Es~~~~~~~~~i~~~i~~l  280 (586)
T Consensus       148 --------------kr---~----~-----~Ea----y----d~i~eDLdwLG~k~Dev~y~Sdr~~----~yYdY~~kL  189 (600)
T TIGR00463       148 --------------KR---V----K-----PEA----Y----DMILEDLDWLGVKGDEVVYQSDRIE----IYYDYARKL  189 (600)
T ss_pred             --------------CC---C----C-----HHH----H----HHHHHHHHHCCCCEEEEEEEECCHH----HHHHHHHHH
T ss_conf             --------------88---8----7-----246----6----5248778752842006898305301----568999999


Q ss_pred             HHCCCCCC
Q ss_conf             97498511
Q gi|254780285|r  281 ARQGYVYE  288 (586)
Q Consensus       281 ~~~g~~~e  288 (586)
T Consensus       190 Ie~G~AY~  197 (600)
T TIGR00463       190 IEMGKAYV  197 (600)
T ss_pred             HHCCCCEE
T ss_conf             86698343