>TIGR00458 aspS_arch aspartyl-tRNA synthetase; InterPro: IPR004523 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 . Aspartyl tRNA synthetase 6.1.1.12 from EC is an alpha2 dimer that belongs to class IIb. Structural analysis combined with mutagenesis and enzymology data on the yeast enzyme point to a tRNA binding process that starts by a recognition event between the tRNA anticodon loop and the synthetase anticodon binding module . This family represents aspartyl-tRNA synthetases from the eukaryotic cytosol and from the archaea. In some species, this enzyme aminoacylates tRNA for both Asp and Asn; Asp-tRNA(asn) is subsequently transamidated to Asn-tRNA(asn). ; GO: 0000166 nucleotide binding, 0004815 aspartate-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006422 aspartyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=677.01 Aligned_cols=420 Identities=25% Similarity=0.454 Sum_probs=355.9 Q ss_pred CCCCCCCC-CEEEEEEEECCCCCCC---CEEEEECCCCEEEEEEECCC--C-CHHHHHHHHHCCCCEEEEEEEEEECCC- Q ss_conf 55564359-8899986881114877---21899779935999980542--7-967888874237431689965763056- Q gi|254781118|r 53 LQNDEKSQ-DMITVAGRVYSSRNSG---MFMDIHDASGKIQIFTHKDT--A-DQDSQNLLSMIDIGDIIGITGQVRRTK- 124 (502) Q Consensus 53 l~~~~~~~-~~V~i~Grv~~~R~~G---~Fi~LrD~~g~iQv~~~~~~--~-~~~~~~~~~~l~~gd~i~v~G~v~~~~- 124 (502) T Consensus 5 D~~~~~dgd~~V~~~g~VH~~R~lG~~l~F~~LRdr~g~~Qi~~~~~~eg~~~~~~~k~~~~l~~Esvv~v~G~V~~~de 84 (466) T TIGR00458 5 DIKPEMDGDQEVLLMGWVHEIRDLGGTLIFVLLRDREGLIQILVPKKKEGVISKELFKLIKKLKKESVVAVKGKVKKVDE 84 (466) T ss_pred CCCCCCCCCCEEEEEEEEECHHHCCCEEEEEEEECCCCEEEEEECCCCCCCHHHHHHHHHHHCCCCCEEEEEEEEEECCC T ss_conf 46510178845899865412421457389988735675267763111144024889999863375648897317875147 Q ss_pred ------CCCCCCCCCEEEEECCCCCCCCCCCCCC--------------CHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHH Q ss_conf ------6553421220122113555432221253--------------11445420110012344444335788999999 Q gi|254781118|r 125 ------RGELTVNAQKIIMLSKALNSIPETYYGL--------------SDVEIRYRKRYLDIISNSDSKIRFQQRSLLIS 184 (502) Q Consensus 125 ------~gelei~~~~~~~l~~~~~~lP~~~~~~--------------~d~e~rl~~R~LDl~~~~~~~~~l~~Rs~i~~ 184 (502) T Consensus 85 p~~~~a~~g~EI~~~~~~v~~~~~~pLPl~~~ea~k~~AE~daaglp~~~ldTRLd~R~~DLR~-~~~~AIF~I~~~~~~ 163 (466) T TIGR00458 85 PEKEKAPGGLEIIPTKLEVLNEAKEPLPLDLTEASKVEAELDAAGLPVVNLDTRLDARFLDLRR-PKVQAIFRIRSEVLE 163 (466) T ss_pred CHHCCCCCCEEEEEEHHHHHHCCCCCCCCCHHHCCCCHHHHHHCCCCEEEECCCHHHHHHHCCC-CCHHHHHHHHHHHHH T ss_conf 4100477752563100011122776788761110234033431375234300111000110256-540212556899999 Q ss_pred HHHHHHHHHHHHHHCCCCCCCCCCCCCCCEEEEECCCCCCCCCCCHHHHHHHHHHHCCCCCHHHHHHHHHHCCCCCCC-C Q ss_conf 998738553454311565323566655420364122222543210012234444210243024543453202542344-3 Q gi|254781118|r 185 QIRHFMEKKGFMEVETPILQPIYGGATADPFKTHHNILKADMYLRIAPELYLKRVLISGLTDQVFELNRNFRNEGVSS-R 263 (502) Q Consensus 185 ~iR~~l~~~gF~EveTP~L~~~~~g~~~~~F~~~~~~~~~~~yL~qSpql~~k~l~~~G~~drvfeI~~~FR~E~~~~-~ 263 (502) T Consensus 164 ~vR~~L~~~~F~Ev~TPKlv~~~tEGGt~lF~i~--YF~~~AfL~QSPQlyKQ~l~~~g~-~rVyEI~PiFRAE~~nT~R 240 (466) T TIGR00458 164 SVREFLAEEGFIEVHTPKLVASATEGGTELFPIT--YFEREAFLGQSPQLYKQVLMAAGL-ERVYEIGPIFRAEEHNTRR 240 (466) T ss_pred HHHHHHHHCCCEEEECCCEEECCCCCCCCCCEEE--EECCCCCCCCCCHHHHHHHHHCCC-CCEEEECCEEECCCCCCHH T ss_conf 9999873088256307621421668885332012--212300013570356687765265-2035505522056665214 Q ss_pred CCCCCCCCCCCCCCCCH-HHHHHHHHHHHHHHHHHHCCCCCCCCCCEEECCCCCCCEEEEECCCCCCCCCCCCCCCCHHH Q ss_conf 24521000100110001-11245678999988998708861311753411332210000000233448862154332167 Q gi|254781118|r 264 HNPEFTMIEAYWAYTDY-RDMMKLVEDLCHNLAKTLHGTTDIPFGEKVISFKAPFACKSMLQLVKEATGLDFMLLKSDQE 342 (502) Q Consensus 264 H~pEFt~lE~e~a~~d~-~dim~l~E~li~~i~~~~~~~~~~~~~~~~~d~~~~f~~~~~~e~i~~~~g~~~~~~~~~e~ 342 (502) T Consensus 241 Hl~E~~siDiE~~F~dhy~~v~d~L~~lv~~~~~dv~~~~~~e-----~el~r--~~~~~~~~~le~P~~~~~Rl~Y~Ea 313 (466) T TIGR00458 241 HLNEAISIDIEMAFEDHYEDVMDILEELVVRVFEDVAEKCAKE-----IELVR--KELETLEVKLEVPEEKFERLTYDEA 313 (466) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH-----HHHHH--HHHCCCCCEECCCCCCCCCCCCHHH T ss_conf 5544444224444275378999999999999999999887888-----99998--7521023132488875553220778 Q ss_pred HHHHHHHHCCCCCCCCCHHHHHHHHHHHCCC----HHEECCEEEEC-CCHHHHHHH-CC-CCCCHHHEEECCEEECCEEE Q ss_conf 7765652023543322318999887652130----10105435655-800234530-35-79672110111355557872 Q gi|254781118|r 343 ARVAAQSIGITVENDALWGEVMMTIFEEKIE----KNIVNPTHITD-FPKDISPFA-KE-VAGEKRLVERFETYCNGWEI 415 (502) Q Consensus 343 ~~~~~~~~g~~~~~~~~~g~l~~~~~e~~ie----~~~~~p~fI~d-fP~~~~Pf~-~~-~~~~~~~~~~fdl~~~G~Ei 415 (502) T Consensus 314 ~e~~-~~~G~ei~----~gEDLs~~a~K~~G~l~re~~~g~yfI~d~wP~ei~PFY~MPd~E~~P~~s~~fDl~~~~~Ei 388 (466) T TIGR00458 314 IEIA-NAKGKEIK----WGEDLSTEAEKALGKLVREEMDGLYFITDKWPTEIRPFYTMPDDEDNPEISKSFDLMYRDLEI 388 (466) T ss_pred HHHH-HHCCCCCC----CCCCCCHHHHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCCCCCCCCCCCHHHHHHHCCCHH T ss_conf 9999-86597155----546654357887647887742761687405876467621388865678600144433311011 Q ss_pred EECHHEECCHHHHHHHHHHHHHHHHCCCCCCC--CCHHHHHHHHCCCCCCCCEECCHHHHHHHHCCCCCCEECCCCCCCC Q ss_conf 00211005799999999999988730573354--5089999976086984613246899989982628840412786757 Q gi|254781118|r 416 CNAFSELNDPVEQRIRMEQQVEQSHQRGEHTI--LDEDFLDAMTYGMPPASGLGLGIDRLIMLLTNAPSIRDVILFPAQR 493 (502) Q Consensus 416 ~~G~~e~~dp~~q~~r~~~~~~~~~~~~~~~~--~~~~yl~a~~yG~PPhgG~glGldRL~m~l~g~~~IRdvi~FP~~k 493 (502) T Consensus 389 ~SGA~RiH~-------~dlL~E~iK~~Gl~P~dp~~~~Yl~aF~YG~PPHAGwGlG~eR~~M~~~~lkNiR~~~LFPRDr 461 (466) T TIGR00458 389 SSGAQRIHL-------YDLLVEKIKAKGLNPEDPGFKDYLEAFKYGMPPHAGWGLGAERLVMVLLGLKNIREAVLFPRDR 461 (466) T ss_pred CCHHHHHHH-------HHHHHHHHHHCCCCCCCCCHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHCCHHHHHHCCCCCCC T ss_conf 000345445-------8888999984588988533687873304784788876410678888774010112200488886 Q ss_pred CC Q ss_conf 66 Q gi|254781118|r 494 VK 495 (502) Q Consensus 494 ~~ 495 (502) T Consensus 462 ~R 463 (466) T TIGR00458 462 KR 463 (466) T ss_pred CC T ss_conf 56

HHsearch alignment for GI: 254781118 and conserved domain: TIGR00458