>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=97.24 E-value=0.00073 Score=46.56 Aligned_cols=301 Identities=15% Similarity=0.146 Sum_probs=150.1 Q ss_pred CCEEEEC-CCCCCCCCCHHHHHHHHHHHHHHHHCC--CEEEEEECCCCCCCCCHHHHHHHHH---HHHHCCCCCCCCCCC Q ss_conf 7705634-843388785015999999999999718--8499997048666388679999999---988658988867655 Q gi|255764513|r 5 SKVRVRI-APSPTGEPHIGTAYTALFNYLIAKRTG--GKFILRIEDTDSKRSTLESENAVMQ---SLKWCGLNWDEGPDI 78 (492) Q Consensus 5 ~~v~~Rf-aPsPtG~lH~G~~rtal~n~l~a~~~~--g~f~lRieDtd~~R~~~~~~~~i~~---~l~wlgl~~De~~~~ 78 (492) T Consensus 118 ~ki~~EfsSaNp~gplH~GHlR~aiIGD~L~r~l~~~G~~V~r~y------yVND~G~Q~~~l~~~~~~~~~e~~-~~-- 188 (600) T TIGR00456 118 KKIIIEFSSANPAGPLHIGHLRNAIIGDSLARILEFLGYDVIREY------YVNDWGRQIGLLVLGVEKFGNEKE-TA-- 188 (600) T ss_pred EEEEEEEECCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEEEE------EECCHHHHHHHHHHHHHHHCCHHH-CC-- T ss_conf 079998765888976110000257778899999987597079852------005428999999999998512132-02-- Q ss_pred CCCCCCEECCCCHHH-HHHHHHHHHHCCCEEECCCCHHHHHHHHHHHHHHHC--C--CCCCCCCCCCCHHHHHHHHH--- Q ss_conf 887676323262899-999999999889824514889997766887664310--0--02366555788333001120--- Q gi|255764513|r 79 GGAYGPYRQSERKNI-YQPYVQNLLEKKLAFRCFCSTERLEEMRRAQRKRNI--P--SRYDGHCLKLSSQEIERLSQ--- 150 (492) Q Consensus 79 ~g~~~p~~QS~r~~~-y~~~~~~L~~~g~aY~c~~t~eel~~~r~~~~~~~~--~--~~Y~~~~r~l~~~e~~~~~~--- 150 (492) T Consensus 189 ----~~~~~~~~~~~~y~~~~k~~~e~~~~~~-~~s~~~~~~~~~~~~e~gdnNe~~~~~w~~~~~~~l~~~k~tl~~ln 263 (600) T TIGR00456 189 ----VKKPDHGLEGFDYVEINKRLEENEEPIN-KQSLEEEARELFVKLESGDNNEKTIKLWKRLVEYALEGIKETLKRLN 263 (600) T ss_pred ----CCCCCCCHHHHHHHHHHHHHHHCCCCCC-CCCHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHC T ss_conf ----6687420123588898878861777653-33545789999997432444289999999999999999999998629 Q ss_pred --------CCCCCEEEEEECC----------CCEEECCCCCCCCEECCCCCC---------CCCCEECCCCCHHHHHHHH Q ss_conf --------2577407886224----------311430475134021364323---------5641000453248986788 Q gi|255764513|r 151 --------EQKKHVVRLTVPN----------QGSCVFQDKVYGEMEIPWNAV---------DMQVLLKSDGMPTYHLANV 203 (492) Q Consensus 151 --------~g~~~~iR~k~p~----------~~~~~~~D~i~G~~~~~~~~~---------~D~vi~r~dg~ptY~~a~v 203 (492) T Consensus 264 i~~D~~~~E~E--~--~~~~~~~~v~e~L~k~~gl~~ed--~gA~~~~L~~f~d~kadG~~k~~Vl~k~DGt~~Y~T~Di 337 (600) T TIGR00456 264 IHFDEFVWEGE--S--VKNGKVPKVLEDLKKEKGLVVED--DGALWLDLTEFGDKKADGDEKDRVLIKSDGTYLYLTRDI 337 (600) T ss_pred CCEEEEEECCE--E--EECCCHHHHHHHHHHHCCCEEEC--CCEEEEECCCCCCCCCCCCCCCEEEEEECCCCCCHHHHH T ss_conf 65005885404--5--77486078999863103780674--734899757766621267645647885089501059899 Q ss_pred ---HHHHHH-HHH--HHHCCCCCCCHHHHHHHHHHHHH--HCCCHHHHHHH--HHHHHCCCCCCCCCC-CCHHHHHHCCC Q ss_conf ---764444-444--31122354302478899999851--00000101455--531101322122343-30245666297 Q gi|255764513|r 204 ---IDDHLM-KIT--HVARGEEWISSVPKHILLYQYFN--FPIPEFIHLPL--IKNPDKSKLSKRRNP-TSISYYSAMGY 272 (492) Q Consensus 204 ---vDD~~m-~it--hviRg~d~~~~t~~q~~l~~al~--~~~p~f~H~pl--i~~~~g~klSKR~~~-~~i~~~~~~Gy 272 (492) T Consensus 338 Ayh~~k~~~~~~d~~i~V~gsdh~~h~~q~~~~~e~LG~~~~~~~L~~~~f~~v~~~~GKkmkTR~G~~i~ld~ll~e~- 416 (600) T TIGR00456 338 AYHLDKLERLGFDKLIYVWGSDHKLHIAQVFAILEKLGYLSKKKELEHLEFGMVPLGSGKKMKTRRGNVISLDNLLDEA- 416 (600) T ss_pred HHHHHHHHHCCCEEEEEEEECCHHHHHHHHHHHHHHCCCCCCCCCEEEEEEEEEECCCCCCCCCCCCCCEEHHHHHHHH- T ss_conf 9999987343972899874051888999999999971653788616899876432578885434556602234468999- Q ss_pred CHHHHHHHHHHCCCCCCCCCH--HHCCH--HHHHHHHHHHHCCCCCCCCHHH-HHHHHHH Q ss_conf 737799899850676665530--11014--6777652021137554420156-5566435 Q gi|255764513|r 273 LPEALINFLALLFVHKSEDDD--ELMDM--QQLIHHFDLHHLSKAGAVFDKQ-KLDWLNG 327 (492) Q Consensus 273 lPeAilNyLalLGws~~~~d~--Eifsl--~eli~~FdL~~I~Ks~A~FD~e-KL~wlN~ 327 (492) T Consensus 417 -~~RA~~~~~~~~~~~~~~e~~e~~a~~vG~gAvry~~l~~~~~~~~~Fd~d~~~L~f~~ 475 (600) T TIGR00456 417 -SKRAGNVITKRNTDLEQDEAEEKVADAVGIGAVRYADLSKNRETHYVFDWDTAMLSFEG 475 (600) T ss_pred -HHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCEEECCCHHHCCCC T ss_conf -99999999611013522203789999973679999999727898815501201111578

HHsearch alignment for GI: 255764513 and conserved domain: TIGR00456