>TIGR00233 trpS tryptophanyl-tRNA synthetase; InterPro: IPR002306 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 . Tryptophanyl-tRNA synthetase (6.1.1.2 from EC) is an alpha2 dimer that belongs to class Ib. The crystal structure of tryptophanyl-tRNA synthetase is known .; GO: 0000166 nucleotide binding, 0004830 tryptophan-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006436 tryptophanyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=752.07 Aligned_cols=330 Identities=42% Similarity=0.626 Sum_probs=299.0 Q ss_pred CCCEEEEEECCCC-CCCHHHHHHHHHHHHHH--HHHCCCCEEEEEEEHHHHCCCC---CHHHHHHHHHHHHHHHHHCCCC Q ss_conf 8887896015896-78105579889999999--8505995899973115730789---8589999999999999962868 Q gi|254780794|r 4 SDNLFVSGVQPTG-VLHLGNYLGMIRNVIRR--QETCNHLGMYFIADLHAITNNI---VQENLRYQSRLFVASFLAAGVD 77 (355) Q Consensus 4 ~~~~vltG~~PtG-~~HLG~y~g~i~~~i~l--q~~~~~~~~~~IAD~halt~~~---~~~~~~~~~~~~~~~~lA~Gld 77 (355) T Consensus 1 ~~~~~~tG~~PSGd~~HlGnylg~~~~~~~~~~q~--~~~~~~~~aD~ha~~~~~~l~~~~~~~~~~~e~~~~~lA~GlD 78 (366) T TIGR00233 1 KKFRVLTGIQPSGDKMHLGNYLGAIRLKVLQEEQE--GYELFFCIADLHAITVKQDLTDPDTLRKAREELVADYLAVGLD 78 (366) T ss_pred CCCEEEECCCCCCCCCCCCCHHHHHHHHHHHHHHC--CCCEEEEEECCHHHHCCCCCCHHHHHHHHHHHHHHHHHHHCCC T ss_conf 98478835457687644330066788887774316--8976899737256514678881778999999999999872647 Q ss_pred CCCCEEEECCCHH---HHHHHHHHHHHCCCHHHHHHCCCCHHHHHHCCCHH---------HHHHHHCCHHHHHHHHHHHC Q ss_conf 1112365247407---88999999851053677520122112332011101---------34664111146654356528 Q gi|254780794|r 78 PSRNIIFKQSDVG---YHADLSWILSCVARMGWMNNMIQFKEKSKENKEET---------ASLGLFMYPVLMAADILLYR 145 (355) Q Consensus 78 p~k~~if~QS~v~---e~~eL~~~l~~~~~~~~l~r~~~~k~~~~~~~~~~---------~~~g~~~YP~lqaADIl~~~ 145 (355) T Consensus 79 P~K~~~f~QS~~~G~~~~~~l~~~l~~~~~~g~l~r~~qFK~~~~~~~~~n~d~~~~~~~v~~Gl~~yP~lmAADIL~~~ 158 (366) T TIGR00233 79 PEKTTIFLQSEVPGGTEHYELAWLLSCVVTFGELKRMTQFKDKSDLKQAENEDPTVNLKEVSIGLLSYPVLMAADILLYQ 158 (366) T ss_pred HHHEEEEEECCCCCCHHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHCCCCCCEEECCCCEEEECCCHHHHHHHHCCC T ss_conf 31467875057665145789999998765167640100477412212214898611200111120126477763431356 Q ss_pred CC----------CEEHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 66----------01112121268999999999998761401100000123211134574314322347564303356774 Q gi|254780794|r 146 AT----------HVPVGEDQRQHLEITRLIAQRFNTEFERKIKEVAQKYAQEEQYSKGFFPIIEGLIDSSASRIRSLRDA 215 (355) Q Consensus 146 a~----------~VpVG~DQ~~HieltRdiA~rfN~~yg~~~~~~~~~~~~~~~~~~~~~~~p~~~i~~~~~ri~~L~~~ 215 (355) T Consensus 159 ~d~~~~~~~~~c~VPVG~DQ~qHleLTRD~A~Rf~~~f~------------------~~f~~P~~~~~~~~~~l~gl~~P 220 (366) T TIGR00233 159 ADEILGPEKKPCLVPVGIDQDQHLELTRDLAERFNKKFK------------------NFFKLPESLISKFGARLMGLQGP 220 (366) T ss_pred CHHHCCCCCCEEEEECCCCCCHHHHHHHHHHHHHHHHHC------------------CCCCCCCHHHHCCCCCCCCCCCC T ss_conf 601257999705850058885268898899999988713------------------32358602331013446687878 Q ss_pred CCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCHHHHCCCCCCCCH------HHHHH-HH Q ss_conf 111321345544520014538899999875200122334643455668763431331122222528------88999-86 Q gi|254780794|r 216 SKKMSKSDSSDFSRINLLDNPDIIAKKIQKAKTDGDVLPSEVSGLENRLEAKNLIEIFATMRQIKI------EEALK-QF 288 (355) Q Consensus 216 ~~KMSKS~~~~~s~I~l~D~~e~I~kKI~ka~TDs~~~~~~~~~~~~~~~v~~Ll~ifs~~~~~~~------~e~~~-~~ 288 (355) T Consensus 221 ~kKMSkS~p~~~~~IfL~D~p~~~~kKI~~~~tds~~P~~~~~~~~~~pGv~~~~~iy~~l~~~~~~dd~~l~~~~~~~~ 300 (366) T TIGR00233 221 KKKMSKSDPNQNSAIFLTDTPKQIKKKIKKAATDSGRPDVTLFEHREKPGVPNLLVIYSALSFFLINDDKKLEEDYEKYK 300 (366) T ss_pred CCCCCCCCCCCCCEECCCCCHHHHHHHHHHHCCCCCCCCHHHHHHCCCCCCCCHHHHHHHHHCCCCCCHHHHHHHHHHHH T ss_conf 53555567888820207989899999977520484567111320013789862577887863379986689999999997 Q ss_pred -CCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCC Q ss_conf -79998999899999999983379999999982799999999999999999999999999998288 Q gi|254780794|r 289 -GGKNFSQFKLALADAVIEEIVPISQKIQHLLKDKSYLDTILVEGANRARCRAQETMKYVNEIVGL 353 (355) Q Consensus 289 -g~~~~gdlK~~Lae~I~~~L~PIRer~~~l~~d~~~v~~IL~~Ga~kAr~~A~~tl~~Vr~~iGl 353 (355) T Consensus 301 ~g~~~~Ge~K~~l~e~~~~~L~~~q~kr~~~~~~~~~~~~il~~G~~kA~~~A~~~l~~~~~a~GL 366 (366) T TIGR00233 301 SGKLLYGELKKALAEVLIEFLKEIQEKRAEIAEEPTELDKILEGGAKKARETANKTLADVKKAMGL 366 (366) T ss_pred HCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHCCHHHHHHHHHCCHHHHHHHHHHHHHHHHHHCCC T ss_conf 047850788799999999998879999988612578999986135788999999987668842179

HHsearch alignment for GI: 254780794 and conserved domain: TIGR00233