>TIGR00395 leuS_arch leucyl-tRNA synthetase; InterPro: IPR004493 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 . Leucyl tRNA synthetase (6.1.1.4 from EC) is an alpha monomer that belongs to class Ia. There are two different families of leucyl-tRNA synthetases. This family includes both archaeal and cytosolic eukaryotic leucyl-tRNA synthetases.; GO: 0000166 nucleotide binding, 0004823 leucine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006429 leucyl-tRNA aminoacylation, 0005737 cytoplasm.

Probab=92.25  E-value=0.078  Score=32.58  Aligned_cols=88  Identities=23%  Similarity=0.417  Sum_probs=49.8

Q ss_pred             CCCCEEEEEEEECCEEEEEECCCCCCCCCEEEEEECCCCEEECHHHHH---HHHHCCCHHH------HHHHHHCCCCCCC
Q ss_conf             486606999998995599756898625627999948998996678986---3330835110------0206754986872
Q gi|255764494|r    9 LGTTNSCVAIMDGKNVRVIENAEGTRTTPSMVGFTDEGERLVGQPAKR---QAVTNPSNTI------FAAKRLIGRRFND   79 (652)
Q Consensus         9 lGtt~s~va~~~~~~~~ii~n~~g~r~~PS~V~~~~~~~~~vG~~A~~---~~~~~p~~ti------~~~KrliG~~~~d   79 (652)
T Consensus       305 yG~Tn~w---v~P~~~Yv~~~~~~e~etenGielienGiwi~~~~A~~~L~yq~~~PkrGf~~~~~~v~g~~liG~~v~~  381 (1109)
T TIGR00395       305 YGVTNVW---VNPDITYVIAEVGGEKETENGIELIENGIWIVSKEAVENLSYQKLKPKRGFLKVIEEVDGKQLIGKKVKN  381 (1109)
T ss_pred             HCCEEEE---ECCCCCEEEEEECCCCCHHHHHHHHHCCHHHHHHHHHHHCCCCCCCCCCCEEEEEEEECHHHHCCCEEEC
T ss_conf             0755355---5577516899733740012004455422577789999604343458874227886530734241764457


Q ss_pred             H-HHHHHHHCCCEEEEECCCC
Q ss_conf             6-7876520198699975998
Q gi|255764494|r   80 S-TVAKDASLVPFKIVEGKGG   99 (652)
Q Consensus        80 ~-~~~~~~~~~~~~~~~~~~~   99 (652)
T Consensus       382 Pq~v~~e~pILPa~fV~~~~g  402 (1109)
T TIGR00395       382 PQVVGKEVPILPAEFVDTEKG  402 (1109)
T ss_pred             CCCCCCCCCCCCCCCCCCCCC
T ss_conf             732589775477011267888