>TIGR00457 asnS asparaginyl-tRNA synthetase; InterPro: IPR004522 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 . AsparaginyltRNA synthetase (6.1.1.22 from EC) is an alpha2 dimer that belongs to class IIb. There is a striking similarity between asparaginyl-tRNA synthetases and archaeal/eukaryotic type aspartyl-tRNA synthetases (IPR004523 from INTERPRO) and a striking divergence of bacterial type aspartyl-tRNA synthetases (IPR004524 from INTERPRO). This family, AsnS, represents asparaginyl-tRNA synthetases from the three domains of life. Some species lack this enzyme and charge tRNA(asn) by misacylation with Asp, followed by transamidation of Asp to Asn.; GO: 0000166 nucleotide binding, 0004816 asparagine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006421 asparaginyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=95.52 E-value=0.098 Score=31.80 Aligned_cols=255 Identities=15% Similarity=0.189 Sum_probs=129.9 Q ss_pred HHHHHHHHHHHHHHH-HCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCEEECCCCC-----C---CCCCEEEECC----C Q ss_conf 899999999999887-6896385554324431000112100125554201001456-----7---7782377434----3 Q gi|254781004|r 273 WKIFQTLISYMRRKI-KDDYEEINTPQVLDQHLWQQSGHWDSYRANMFAVKCADDT-----I---KDLRTFALKP----M 339 (652) Q Consensus 273 ~~i~~~ie~~ir~~~-~~G~~eV~tP~l~~~~Lw~~SGh~~~y~~~mf~~~~~~~~-----~---~~~~~~~LkP----m 339 (652) T Consensus 146 mrvR~~l~~ai~~yF~~~gF~~V~~PilT~~d~-------EG-AGElF~v~TLdl~~lp~~~g~~df~~~fFgk~ayLTV 217 (495) T TIGR00457 146 MRVRNALSQAIHEYFQKNGFVKVSPPILTSNDC-------EG-AGELFKVSTLDLEKLPRNDGKIDFSKDFFGKEAYLTV 217 (495) T ss_pred HHHHHHHHHHHHHHHHCCCCEEECCCEEECCCC-------CC-CCCCCEEEEHHHHCCCCCCCCCCCCCCCCCCEEEEEE T ss_conf 999999999999876047867868863113688-------88-7543322003242153326888763024886012330 Q ss_pred CHHHHHHHHHHCCCCHHHCCHHHHHHEEEECCCCCCCCEEEEECCCCCCCCCE-EECCHHHHHHHHHHHHHHHH-HHHHH Q ss_conf 12577776520122223104320001000127876452000105635334421-01053767887899999988-76655 Q gi|254781004|r 340 NCPGHVAVFNHGLKSYRELPVRLAEFGSVYRNEPSGSLHGLMRVRGFTQDDAH-VFCTKEQMFNECLKIHNLII-SIYKD 417 (652) Q Consensus 340 ncp~h~~i~~~~~~SYrdLPlrl~e~~~~~R~E~sg~l~GL~R~ReF~~~Dah-~F~~~eq~~~e~~~~~~~~~-~v~~~ 417 (652) T Consensus 218 SGQL~~E~~A~AL~-------kvyTfGPTFRAEkS~T~---RHLsEFWMiEPE~AF~~l~d~~~~~E~~~k~~~k~VL~~ 287 (495) T TIGR00457 218 SGQLYAEAYALALS-------KVYTFGPTFRAEKSNTS---RHLSEFWMIEPEMAFANLNDLLQLIETLIKYIIKAVLEN 287 (495) T ss_pred CCHHHHHHHHHHHC-------CCEECCCCEECCCCCCC---CCHHHHHHHHHHEEECCHHHHHHHHHHHHHHHHHHHHCC T ss_conf 22789999999747-------81445874004286487---011122101120000013333899999999999998305 Q ss_pred --------HCCCCC---EECCCCC--------CCCCCCCHHHH---HHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCC Q ss_conf --------213321---0001465--------31125860357---7899999999985021212566752055555545 Q gi|254781004|r 418 --------FGFEKI---MVKLSTR--------PEKRVGSDALW---DDAENIMKGVLDTIKNSSQDRINTGVLLGEGAFY 475 (652) Q Consensus 418 --------~g~~~~---~~~ls~~--------~~~~~g~~~~~---~~ae~~l~~~l~~~~~~~~~~~~~~~~~g~~afy 475 (652) T Consensus 288 ~qellPkqfi~~~enn~~~~L~~~~~~~~~~~l~~~i~~~F~~i~Y~~Ai~iL~~~~~~~------~~~Fe~~d~---~w 358 (495) T TIGR00457 288 QQELLPKQFICSQENNLLKFLEKNFDKDLIKKLENIINNKFARITYTDAIEILKESDNKE------KKNFEYEDF---EW 358 (495) T ss_pred HHHHCCHHHCCCCHHHHHHHHHHHCCHHHHHHHHHHHHCCCCEECHHHHHHHHHHHHHCC------CCCCCCCCC---CC T ss_conf 245042010377713799986641275677522566622676004789999987421114------643588861---34 Q ss_pred CCCCC----CCHHHHCCCCCCCCCCCHHHHCCCCCCCEEEEECCCEEEEEEEEECCCHHHHHHHHHHHHHHCCCCCCCCC Q ss_conf 54321----10021103310012110111022346741673179721379964034103789999999973870887337 Q gi|254781004|r 476 GPKFE----YILKDAIGRDWQCGTIQVDFNLPSRFNAFYVNSHSEKCHPVMIHRAVFGSIERFIGIMIENFKGNLPLWLS 551 (652) Q Consensus 476 gpkid----~~~~d~~gr~~~~~tiq~df~~p~~f~l~y~~~dg~~~~pvmihr~~~Gs~eR~ia~liE~~~g~~P~wLA 551 (652) T Consensus 359 G~DL~~eHER~LaE~~Fk~q--Pvf--V~~YPk~~KaFYMk~NS~D~~tV~----a~-------------------DlL~ 411 (495) T TIGR00457 359 GIDLQTEHERFLAEEYFKPQ--PVF--VTDYPKDIKAFYMKLNSDDGKTVA----AV-------------------DLLA 411 (495) T ss_pred CCCCCHHHHHHHHHCCCCCC--CEE--EECCCCCCCCHHCCCCCCCCCEEE----EE-------------------EEEC T ss_conf 88863368998763158988--889--973885558010536678887478----99-------------------9837 Q ss_pred CEEE-EEEECCHHHHHHHHHHHHHHHHCCCEE Q ss_conf 8089-998579668999999999999879889 Q gi|254781004|r 552 PIQA-IVTTITSSAVEYAQEIANLLKSHHLSI 582 (652) Q Consensus 552 P~QV-~Iipi~e~~~eya~~i~~~L~~~girV 582 (652) T Consensus 412 P~GiGEIiGGS~Re~d-ld~L~~r~k~~g~d~ 442 (495) T TIGR00457 412 PKGIGEIIGGSEREDD-LDKLEERMKEMGLDT 442 (495) T ss_pred CCCEEEEECCCCCHHH-HHHHHHHHHHCCCCC T ss_conf 8962665167543226-899999999648688

HHsearch alignment for GI: 254781004 and conserved domain: TIGR00457