>TIGR00408 proS_fam_I prolyl-tRNA synthetase; InterPro: IPR004499 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 . Prolyl-tRNA synthetase is a class II tRNA synthetase and is recognized by IPR002314 from INTERPRO, which recognises tRNA synthetases for Gly, His, Ser, and Pro. The prolyl-tRNA synthetases are divided into two widely divergent families. This family includes the archaeal enzyme, the Pro-specific domain of a human multifunctional tRNA ligase, and the enzyme from the spirochete Borrelia burgdorferi (Lyme desease spirochete). The other family, IPR004500 from INTERPRO, includes enzymes from Escherichia coli, Bacillus subtilis, Synechocystis sp. (strain PCC6803), and one of the two prolyl-tRNA synthetases of Saccharomyces cerevisiae (Baker's yeast).; GO: 0000166 nucleotide binding, 0004827 proline-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006433 prolyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=90.97  E-value=0.82  Score=24.44  Aligned_cols=125  Identities=22%  Similarity=0.188  Sum_probs=83.3

Q ss_pred             HHHHHHHHHHHHHHHHHHH-------------------HHHHHCCCCCCCCCC--------CC-CCCEEEEEC---CCCC
Q ss_conf             5788999999998738553-------------------454311565323566--------65-542036412---2222
Q gi|254781118|r  175 RFQQRSLLISQIRHFMEKK-------------------GFMEVETPILQPIYG--------GA-TADPFKTHH---NILK  223 (502)
Q Consensus       175 ~l~~Rs~i~~~iR~~l~~~-------------------gF~EveTP~L~~~~~--------g~-~~~~F~~~~---~~~~  223 (502)
T Consensus        38 g~~iw~~iq~~~~~~~~~~~~~~~~~L~~F~P~~~~~Y~h~~v~fP~L~p~~~L~KEk~HikGF~pEv~wi~~~G~~~L~  117 (533)
T TIGR00408        38 GFKIWENIQKILRDKLDEIKLKDKVILKKFIPIESLPYGHEEVYFPMLIPESELEKEKDHIKGFEPEVYWITHGGLKKLD  117 (533)
T ss_pred             CHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCHHEECCCCCCHHHHHHHCCCCCCCCCHHHHEECCCCCCCC
T ss_conf             77899999999999998764354676640567777777700100564452557863213568858400210103777246


Q ss_pred             CCCCCCHHHHH-----HHHHHHCC-CCCHHHHHHHHHHCCCCC--CC-CCCCCCC-CCCCCCCCCCHHHHHHHHHHHHHH
Q ss_conf             54321001223-----44442102-430245434532025423--44-3245210-001001100011124567899998
Q gi|254781118|r  224 ADMYLRIAPEL-----YLKRVLIS-GLTDQVFELNRNFRNEGV--SS-RHNPEFT-MIEAYWAYTDYRDMMKLVEDLCHN  293 (502)
Q Consensus       224 ~~~yL~qSpql-----~~k~l~~~-G~~drvfeI~~~FR~E~~--~~-~H~pEFt-~lE~e~a~~d~~dim~l~E~li~~  293 (502)
T Consensus       118 ~pLaLRPTSEt~~y~m~~kWv~sy~DLPlk~nQw~~vfR~E~kHTRPflR~rEf~twqE~HT~H~t~~eAee~v~~~~~-  196 (533)
T TIGR00408       118 EPLALRPTSETAMYNMYKKWVKSYRDLPLKINQWVNVFRYEKKHTRPFLRTREFLTWQEAHTAHATAEEAEEEVLKALD-  196 (533)
T ss_pred             CCCEECCCCHHHHHHHHHHHHHHCCCCCEEEEEEEEEEECCCCCCCCCHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHH-
T ss_conf             7501258617888765787851215887689843588980217878610233321010001314377788999999999-


Q ss_pred             HHHHHCC
Q ss_conf             8998708
Q gi|254781118|r  294 LAKTLHG  300 (502)
Q Consensus       294 i~~~~~~  300 (502)
T Consensus       197 ~Yk~f~~  203 (533)
T TIGR00408       197 LYKEFIE  203 (533)
T ss_pred             HHHHHHH
T ss_conf             8899975