>cd00670 Gly_His_Pro_Ser_Thr_tRS_core Gly_His_Pro_Ser_Thr_tRNA synthetase class II core domain. This domain is the core catalytic domain of tRNA synthetases of the subgroup containing glycyl, histidyl, prolyl, seryl and threonyl tRNA synthetases. It is primarily responsible for ATP-dependent formation of the enzyme bound aminoacyl-adenylate. These enzymes belong to class II aminoacyl-tRNA synthetases (aaRS) based upon their structure and the presence of three characteristic sequence motifs in the core domain. This domain is also found at the C-terminus of eukaryotic GCN2 protein kinase and at the N-terminus of the ATP phosphoribosyltransferase accessory subunit, HisZ and the accessory subunit of mitochondrial polymerase gamma (Pol gamma b) . Most class II tRNA synthetases are dimers, with this subgroup consisting of mostly homodimers. These enzymes attach a specific amino acid to the 3' OH group of ribose of the appropriate tRNA.

Probab=99.58 E-value=1.9e-14 Score=112.99 Aligned_cols=146 Identities=20% Similarity=0.301 Sum_probs=118.3 Q ss_pred HHHHHHHHHHHHHHHHHCCCEEEECCCHHHHHHHHCCCCCCCCCCCCEEEEECCC----CCEEEECCCCHHHHHHHHHHH Q ss_conf 9999999999999999859848016520228875202675543332216898699----988999888838999999951 Q gi|254780928|r 23 IRIRNRILDSIRNIYENYGFDPIETPLLEYSDSLGKFLPDEDRPNKGVFSLQDDD----GQWISLRYDLTAPLARYVAEN 98 (496) Q Consensus 23 ~~~~~~i~~~l~~~f~~~G~~~I~tP~lE~~~~~~~~~~~~~~~~k~~y~f~D~~----g~~l~LRpDlT~~~aR~~~~~ 98 (496) T Consensus 2 a~L~~aL~~~~~~~~~~~G~~~v~~P~l~~~~~~~~s-g~~~~f~~~~y~v~~~~~~~~~~~~~L~PTsE~~~~~~~~~~ 80 (235) T cd00670 2 TALWRALERFLDDRMAEYGYQEILFPFLAPTVLFFKG-GHLDGYRKEMYTFEDKGRELRDTDLVLRPAACEPIYQIFSGE 80 (235) T ss_pred HHHHHHHHHHHHHHHHHCCCEEEECCCCCCHHHHHHC-CCCCCCCCCEEEEECCCCCCCCCCEEEEECCCHHHHHHHHCC T ss_conf 8899999999999999869989989855789999223-867545205289823776667873899307869999999483 Q ss_pred HH-HCCCCHHHHHHHHHHCCCCC-CCC--CCCCCCCCCHHHHHCCCH--HHHHHHHHHHHHHHHHCCCCCCCCEEECCCC Q ss_conf 12-05541123310133302587-644--421111100012100002--4578899999999975188877711303660 Q gi|254780928|r 99 FD-TIVFPCRTYRIGPVFRNEKH-GPG--RFRQFIQCDVDNVGSSAE--TADAEMCMMMADTLEAVGIKRNDYHIGINNR 172 (496) Q Consensus 99 ~~-~~~~p~k~yy~g~vfR~e~p-~~G--r~REf~Q~g~eiiG~~~~--~~DaEii~l~~~~l~~lgl~~~~~~I~in~~ 172 (496) T Consensus 81 i~s~~dLPlr~~~~s~~fR~E~~~~~Gl~Rv~eF~k~E~~~~~~~e~~~~~~~~~~~~~~~i~~~L~l~---y~v~~~~~ 157 (235) T cd00670 81 ILSYRALPLRLDQIGPCFRHEPSGRRGLMRVREFRQVEYVVFGEPEEAEEERREWLELAEEIARELGLP---VRVVVADD 157 (235) T ss_pred CCCHHHCCEEEEEECCEECCCCCCCCCCEEEEEEEEEEEEEEECHHHHHHHHHHHHHHHHHHHHHCCCC---EEEEECCC T ss_conf 287687995454456533367899999836789998507999688999999999999999999986997---79997586

HHsearch alignment for GI: 254780928 and conserved domain: cd00670