>TIGR00414 serS seryl-tRNA synthetase; InterPro: IPR002317 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 . Seryl-tRNA synthetase (6.1.1.11 from EC) exists as monomer and belongs to class IIa .; GO: 0000166 nucleotide binding, 0004828 serine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006434 seryl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=99.20 E-value=1.3e-10 Score=92.98 Aligned_cols=283 Identities=20% Similarity=0.356 Sum_probs=209.9 Q ss_pred CCHHHHHHHHH--HHHHHHHH--HHHHHHHHCCEEEECC----CCCCEEEEECCHHHHHHHHHHHHHH-HH-HCCCEEEE Q ss_conf 79889999999--99975320--0887541144044226----7874356501078999999999998-87-68963855 Q gi|254781004|r 226 NTQQELTQYLY--FLEESEKR--DHRKLAREMDLFHIAE----DGSGVIFWHRKGWKIFQTLISYMRR-KI-KDDYEEIN 295 (652) Q Consensus 226 ~~~~~l~~~~~--~~eea~~r--dHr~lg~~~~lf~~~~----~~~G~~~wlP~G~~i~~~ie~~ir~-~~-~~G~~eV~ 295 (652) T Consensus 147 ~~~~~~~~~~~~~~~~~~~~~~~~h~~~~~~~~~~d~~~~~~~~g~~~~~~~~~~~~~~~al~~~~l~~~~~~~g~~~~~ 226 (460) T TIGR00414 147 YDEEVKKWGTPPLPSFDFKPKDLPHWELGEKLGLLDFERAVKLAGSRFYYLKGDGAKLERALINFMLDLLREKNGYSELY 226 (460) T ss_pred HHHHHHHHHCCCCCCCCCCCCCCHHHHHHHHCCCCCHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEC T ss_conf 01356664100122001331112156788770651013333441010121321367899999999998644322640101 Q ss_pred CCCCCCCCCCCCCC---CCCCCCCCCCEEECCCCCCCCCCEEEECCCCHHHHHHHHHHCCCCH--HHCCHHHHHHEEEEC Q ss_conf 54324431000112---1001255542010014567778237743431257777652012222--310432000100012 Q gi|254781004|r 296 TPQVLDQHLWQQSG---HWDSYRANMFAVKCADDTIKDLRTFALKPMNCPGHVAVFNHGLKSY--RELPVRLAEFGSVYR 370 (652) Q Consensus 296 tP~l~~~~Lw~~SG---h~~~y~~~mf~~~~~~~~~~~~~~~~LkPmncp~h~~i~~~~~~SY--rdLPlrl~e~~~~~R 370 (652) T Consensus 227 ~p~~~~~~~~~~~g~~~~~~~~~~~~~~~~~-----~~~~~~~l~~t~e~~~~~~~~~~~~~~~~~~lp~~~~~~~~cfr 301 (460) T TIGR00414 227 PPYLVNEELLDGTGFNPQLPKFEEDLFKLED-----TDDEKLYLIPTAEVPLTNLHRDEILDLPSEELPIKYTGYSPCFR 301 (460) T ss_pred CCHHHHHHHHHHCCCCCCCCCHHHHHHHHCC-----CCCCEEEEEECCHHHHHHHHHHHHCCCCCCCCCEEHCCCCHHHH T ss_conf 4035423443102456556530234432126-----77750465201000122222000102652103400000220233 Q ss_pred CCCCC---CCEEEEECCCCCCCCCEEECCHHHHHHHHHHHHHHHHHHHHHHCCCCCEECCCCCCCCCCCC----HHHHHH Q ss_conf 78764---52000105635334421010537678878999999887665521332100014653112586----035778 Q gi|254781004|r 371 NEPSG---SLHGLMRVRGFTQDDAHVFCTKEQMFNECLKIHNLIISIYKDFGFEKIMVKLSTRPEKRVGS----DALWDD 443 (652) Q Consensus 371 ~E~sg---~l~GL~R~ReF~~~Dah~F~~~eq~~~e~~~~~~~~~~v~~~~g~~~~~~~ls~~~~~~~g~----~~~~~~ 443 (652) T Consensus 302 ~eag~~g~~~~g~~r~h~f~k~e~~~~~~p~~~~~~~~~~~~~~~~~~~~l~~p~~~~~~~~gd~g~~~~~~yd~e~W~p 381 (460) T TIGR00414 302 SEAGSYGKDTKGLIRVHQFNKVELVKFCKPEESWEELEELLSDAEKILQELELPYRVLNLCTGDLGFGAAKKYDLEVWLP 381 (460) T ss_pred HHCCCCCCCCHHHHHHHHCCCEEEEEEECCHHHHHHHHHHHHHHHHHHHHHCCCHHHHEECCCCCCCCCCCCEEEEEEEE T ss_conf 32134554100012111003102456635401489999998789999997437511100012434642011010013410 Q ss_pred HHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHCCCCCCCCCCCHHHHCCCCCCCEEEEECCCEEEEEEE Q ss_conf 99999999985021212566752055555545543211002110331001211011102234674167317972137996 Q gi|254781004|r 444 AENIMKGVLDTIKNSSQDRINTGVLLGEGAFYGPKFEYILKDAIGRDWQCGTIQVDFNLPSRFNAFYVNSHSEKCHPVMI 523 (652) Q Consensus 444 ae~~l~~~l~~~~~~~~~~~~~~~~~g~~afygpkid~~~~d~~gr~~~~~tiq~df~~p~~f~l~y~~~dg~~~~pvmi 523 (652) T Consensus 382 ~~~-----------------------g-g~y-------------~e~~~~~~-~~d~-~~~~~~~~~~~~~~~~~~~~~~ 422 (460) T TIGR00414 382 GQN-----------------------G-GTY-------------REISSCSN-CTDF-QARRLNIRYKDKGGGKRENEYV 422 (460) T ss_pred CCC-----------------------C-CCC-------------CEECCCCC-CHHH-HHHHHHHHHHHCCCCCCCCCEE T ss_conf 467-----------------------8-741-------------10001233-1145-6665443332203665321000 Q ss_pred EECCCH---HHHHHHHHHHHHHC---C--CCCCCCCCE Q ss_conf 403410---37899999999738---7--088733780 Q gi|254781004|r 524 HRAVFG---SIERFIGIMIENFK---G--NLPLWLSPI 553 (652) Q Consensus 524 hr~~~G---s~eR~ia~liE~~~---g--~~P~wLAP~ 553 (652) T Consensus 423 ~-~lng~~~~~~r~~~~~~en~~~~~g~~~~p~~l~~~ 459 (460) T TIGR00414 423 H-TLNGTALAVGRTLVAILENYQDEDGSVEVPEVLRKY 459 (460) T ss_pred E-ECCCCHHHHHHHHHHHHHHHCCCCCCEECHHHHHCC T ss_conf 1-003312345678887776410557745412554113

HHsearch alignment for GI: 254781004 and conserved domain: TIGR00414