>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=99.77 E-value=1.4e-17 Score=136.18 Aligned_cols=264 Identities=16% Similarity=0.211 Sum_probs=190.4 Q ss_pred CCEEEEEEECCCCCCCCHHHHHHHHHHHHHH--HCCCEEEEEEECHHHCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHH Q ss_conf 9818999843787620243489999999999--85984999982601114488988621024688999999999999988 Q gi|254780949|r 34 GVVTAYIGYDLTASSLHAGHLTQLMLLFWLQ--KTGHKPISLMGGGTSIIGDPSFRDESRRMMRSQEIQENIEKIKGIFS 111 (418) Q Consensus 34 ~~~~~y~G~DpT~~slH~G~l~~~~~l~~~q--~~Gh~~i~liG~~T~~IGDPsgk~~~R~~l~~~~i~~n~~~~~~q~~ 111 (418) T Consensus 1 ~~~~~~tG~~PSGd~~HlGnylg~~~~~~~~~~q~~~~~~~~~aD~ha~~~~~-------~l~~~~~~~~~~~e---~~~ 70 (366) T TIGR00233 1 KKFRVLTGIQPSGDKMHLGNYLGAIRLKVLQEEQEGYELFFCIADLHAITVKQ-------DLTDPDTLRKAREE---LVA 70 (366) T ss_pred CCCEEEECCCCCCCCCCCCCHHHHHHHHHHHHHHCCCCEEEEEECCHHHHCCC-------CCCHHHHHHHHHHH---HHH T ss_conf 98478835457687644330066788887774316897689973725651467-------88817789999999---999 Q ss_pred HHHHCCCCCCCCEEEEHHHHH--CCCCHHHHHHHHHHHHHHHHHHHHHHHHHHC--CCCCC---------CCHHHHHHHH Q ss_conf 765326777640233016752--3431346888752234478753478888740--35688---------3157889898 Q gi|254780949|r 112 SFIKYGTGKTDALMLNNETWL--CSIKYIDLLREIGSFFSVNRMLSFESVRSRL--KREQS---------LSFLEFNYMI 178 (418) Q Consensus 112 ~~~~~~~~~~~~~i~~N~~W~--~~~~~~~~lr~~g~~~~v~~mL~rd~v~~Rl--~~~~~---------is~~EF~Y~l 178 (418) T Consensus 71 ~~lA~GlDP~K~~~f~QS~~~G~~~~~~l~~~--l~~~~~~g~l~r~~qFK~~~~~~~~~n~d~~~~~~~v~~Gl~~yP~ 148 (366) T TIGR00233 71 DYLAVGLDPEKTTIFLQSEVPGGTEHYELAWL--LSCVVTFGELKRMTQFKDKSDLKQAENEDPTVNLKEVSIGLLSYPV 148 (366) T ss_pred HHHHHCCCHHHEEEEEECCCCCCHHHHHHHHH--HHHHHHHHHHHHHCCCCCHHHHHHHCCCCCCEEECCCCEEEECCCH T ss_conf 99872647314678750576651457899999--9876516764010047741221221489861120011112012647 Q ss_pred HHHHHHHHHHHH-------CCCCEECCCCHHHHHHHHHHHHHHHCCC---------CCEEEEEECEEECCCC--HHHHHH Q ss_conf 989999999854-------2970201541258899888999973167---------9717983110236871--022354 Q gi|254780949|r 179 LQAYDFVELAKN-------YDCRLQMGGSDQWGNIICGIDLGERLKT---------PKLFALTSPLLTTASG--TKMGKT 240 (418) Q Consensus 179 lQayD~~~L~~~-------~~~~iqiGGsDQwgNi~~G~eLir~~~~---------~~~~glT~PLLt~~dG--~KmgKS 240 (418) T Consensus 149 lmAADIL~~~~d~~~~~~~~~c~VPV-G~DQ~qHleLTRD~A~Rf~~~f~~~f~~P~~~~~~~~~~l~gl~~P~kKMSkS 227 (366) T TIGR00233 149 LMAADILLYQADEILGPEKKPCLVPV-GIDQDQHLELTRDLAERFNKKFKNFFKLPESLISKFGARLMGLQGPKKKMSKS 227 (366) T ss_pred HHHHHHHCCCCHHHCCCCCCEEEEEC-CCCCCHHHHHHHHHHHHHHHHHCCCCCCCCHHHHCCCCCCCCCCCCCCCCCCC T ss_conf 77634313566012579997058500-58885268898899999988713323586023310134466878785355556 Q ss_pred HHC---CCCCCCCCCCHHHHHHHHHH-HCHHHH--------------------HHHHHHHCCCCHHHHHHHHHH--HHCC Q ss_conf 310---12333457997999998862-078889--------------------879975068885675554333--2102 Q gi|254780949|r 241 LSG---AIWLNKEMTSPYNFWQYWRN-IDDADV--------------------VSFAKRLTTLPMSEIDRMAKL--QGKE 294 (418) Q Consensus 241 ~~n---aIwLd~~~tSPy~fyQf~~n-~~D~dV--------------------~kyLklfT~l~l~EI~~l~~~--~~~~ 294 (418) T Consensus 228 ~p~~~~~IfL~---D~p~~~~kKI~~~~tds~~P~~~~~~~~~~pGv~~~~~iy~~l~~~~~~dd~~l~~~~~~~~~g~~ 304 (366) T TIGR00233 228 DPNQNSAIFLT---DTPKQIKKKIKKAATDSGRPDVTLFEHREKPGVPNLLVIYSALSFFLINDDKKLEEDYEKYKSGKL 304 (366) T ss_pred CCCCCCEECCC---CCHHHHHHHHHHHCCCCCCCCHHHHHHCCCCCCCCHHHHHHHHHCCCCCCHHHHHHHHHHHHHCCC T ss_conf 78888202079---898999999775204845671113200137898625778878633799866899999999970478 Q ss_pred -CCHHHHHHHHHHHHHHHHH Q ss_conf -2026889899999973000 Q gi|254780949|r 295 -INEAKKIIATEITTMVHGR 313 (418) Q Consensus 295 -pr~aKk~LA~EiT~lvHGe 313 (418) T Consensus 305 ~~Ge~K~~l~e~~~~~L~~~ 324 (366) T TIGR00233 305 LYGELKKALAEVLIEFLKEI 324 (366) T ss_pred CCHHHHHHHHHHHHHHHHHH T ss_conf 50788799999999998879

HHsearch alignment for GI: 254780949 and conserved domain: TIGR00233