>TIGR00456 argS arginyl-tRNA synthetase; InterPro: IPR001278 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 . Arginyl-tRNA synthetase (6.1.1.19 from EC) has been crystallized and preliminary X-ray crystallographic analysis of yeast arginyl-tRNA synthetase-yeast tRNAArg complexes is available . ; GO: 0000166 nucleotide binding, 0004814 arginine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006420 arginyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=98.60 E-value=2.4e-05 Score=58.51 Aligned_cols=273 Identities=16% Similarity=0.153 Sum_probs=163.7 Q ss_pred CCEEEEEEC---CCCEEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHHHHHCCCCCEEEEECCCCC-------------- Q ss_conf 826223304---798479996167888844411127999999999999970799845799605523-------------- Q gi|254780573|r 13 RKITEFQAI---DPSNIRMYVCGPTVYDFAHIGNARPMIVFDVLYRLLRYYYGEKCVTYVRNITDI-------------- 75 (461) Q Consensus 13 ~~~~~f~p~---~~~~v~~Y~CGpTvy~~~HiG~~r~~v~~D~l~R~L~~~~~~~~V~~v~niTDi-------------- 75 (461) T Consensus 104 ~~~e~yG~~~~~~~~ki~~EfsSaNp~gplH~GHlR~aiIGD~L~r~l~~~G~~--V~r~yyVND~G~Q~~~l~~~~~~~ 181 (600) T TIGR00456 104 EQKEKYGSKKLKESKKIIIEFSSANPAGPLHIGHLRNAIIGDSLARILEFLGYD--VIREYYVNDWGRQIGLLVLGVEKF 181 (600) T ss_pred HCCCCCCCCCCCCCEEEEEEEECCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCC--EEEEEEECCHHHHHHHHHHHHHHH T ss_conf 012024676657870799987658889761100002577788999999875970--798520054289999999999985 Q ss_pred ---------------CH--------------H------HHHHHHH-----CCCC--CCCCCCHHHHHHHHHHHHHHHHHH Q ss_conf ---------------38--------------8------8999987-----0898--644884899999999999998776 Q gi|254780573|r 76 ---------------DD--------------K------IIERARQ-----EHPS--IPINDAISIITSKNTQQFVKDTTR 113 (461) Q Consensus 76 ---------------dD--------------k------ii~~a~~-----~~~~--~~~~~~~~~~a~~~~~~f~~d~~~ 113 (461) T Consensus 182 ~~e~~~~~~~~~~~~~~~~y~~~~k~~~e~~~~~~~~s~~~~~~~~~~~~e~gdnNe~~~~~w~~~~~~~l~~~k~tl~~ 261 (600) T TIGR00456 182 GNEKETAVKKPDHGLEGFDYVEINKRLEENEEPINKQSLEEEARELFVKLESGDNNEKTIKLWKRLVEYALEGIKETLKR 261 (600) T ss_pred CCHHHCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 12132026687420123588898878861777653335457899999974324442899999999999999999999986 Q ss_pred HCCCCCCHH-HHHHHHHHHHHHHHHHHH-HCCCCCCCCCCEEECCHHCCCC---CCCCCCCHHHHHHHHHCCCCCCCCCC Q ss_conf 268541000-123567777899999874-1143201289287522002454---32246754666643210222210123 Q gi|254780573|r 114 LACLAPTHQ-PRATNHIPQMIYLIQNII-LHGHAYEANNEIIFDTSSIPNY---GSFSRRKIDEQKMGTRVPEKYHKKNP 188 (461) Q Consensus 114 L~v~~p~~~-pr~t~~i~~~i~~i~~L~-~~g~aY~~~g~VyFdv~~~~~Y---G~Ls~~~~~~~~~g~r~~~~~~K~~p 188 (461) T Consensus 262 lni~~D~~~~E~E~~~~~~~~~v~e~L~k~~gl~~ed~gA~~~~L~~f~d~kadG~-----------------------~ 318 (600) T TIGR00456 262 LNIHFDEFVWEGESVKNGKVPKVLEDLKKEKGLVVEDDGALWLDLTEFGDKKADGD-----------------------E 318 (600) T ss_pred HCCCEEEEEECCEEEECCCHHHHHHHHHHHCCCEEECCCEEEEECCCCCCCCCCCC-----------------------C T ss_conf 29650058854045774860789998631037806747348997577666212676-----------------------4 Q ss_pred CCEEEEECCCCCCCEEECCCCCCCCCCCCHHH-HHHHH--HCCC--CEEEEEECCCCCCCCCHHHHHHHHHHCC-CC--C Q ss_conf 51266633776663141467766764332047-77787--5298--4148741356666875136688886408-75--3 Q gi|254780573|r 189 ADFILWKRSTPMEPGWESPWGRGRPGWHIECS-AMSSH--YLGK--VFDIHGGGLDLIFPHHENEIAQSCCADR-IE--K 260 (461) Q Consensus 189 ~DFaLWK~~~~~e~~w~spwG~GRPGWHiECs-am~~~--~lg~--~~DIH~GG~DL~FPHHENEiAQs~a~~~-~~--~ 260 (461) T Consensus 319 k~~Vl~k~--DGt~~Y~T~-----------DiAyh~~k~~~~~~d~~i~V~gs-------dh~~h~~q~~~~~e~LG~~~ 378 (600) T TIGR00456 319 KDRVLIKS--DGTYLYLTR-----------DIAYHLDKLERLGFDKLIYVWGS-------DHKLHIAQVFAILEKLGYLS 378 (600) T ss_pred CCEEEEEE--CCCCCCHHH-----------HHHHHHHHHHHCCCEEEEEEEEC-------CHHHHHHHHHHHHHHCCCCC T ss_conf 56478850--895010598-----------99999998734397289987405-------18889999999999716537 Q ss_pred CHHHEECCCEEEEEE---CCCCCCCCCCCCHHHHHCCCCCC------C---------------CCCCHHHHHHHHHCCCC Q ss_conf 012100343257642---02233233214089985025334------5---------------57779999999842566 Q gi|254780573|r 261 TANIWIHNGFLNLEG---RKMSKSNGNFITINELLETKKFG------G---------------RSWPAPVIRLAMLMTHY 316 (461) Q Consensus 261 ~a~yWlH~G~l~i~g---eKMSKSlGN~iti~dlL~~~~~~------~---------------k~y~p~viR~~lLsshY 316 (461) T Consensus 379 ~~~~L~~~~f~~v~~~~GKkmkTR~G~~i~ld~ll~e~~~RA~~~~~~~~~~~~~~e~~e~~a~~vG~gAvry~~l~~~~ 458 (600) T TIGR00456 379 KKKELEHLEFGMVPLGSGKKMKTRRGNVISLDNLLDEASKRAGNVITKRNTDLEQDEAEEKVADAVGIGAVRYADLSKNR 458 (600) T ss_pred CCCCEEEEEEEEEECCCCCCCCCCCCCCEEHHHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHHHHHHHHCC T ss_conf 88616899876432578885434556602234468999999999996110135222037899999736799999997278 Q ss_pred CCCCCCCHH-HHHHH Q ss_conf 432114503-46877 Q gi|254780573|r 317 REPIDFTVQ-RLTEA 330 (461) Q Consensus 317 RspLdfS~e-~L~~A 330 (461) T Consensus 459 ~~~~~Fd~d~~~L~f 473 (600) T TIGR00456 459 ETHYVFDWDTAMLSF 473 (600) T ss_pred CCCCEEECCCHHHCC T ss_conf 988155012011115

HHsearch alignment for GI: 254780573 and conserved domain: TIGR00456