HHsearch alignment for GI: 254780445 and conserved domain: TIGR00396

>TIGR00396 leuS_bact leucyl-tRNA synthetase; InterPro: IPR002302 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 the eubacterial and mitochondrial synthetases. The crystal structure of leucyl-tRNA synthetase from the hyperthermophile Thermus thermophilus has an overall architecture that is similar to that of isoleucyl-tRNA synthetase, except that the putative editing domain is inserted at a different position in the primary structure. This feature is unique to prokaryote-like leucyl-tRNA synthetases, as is the presence of a novel additional flexibly inserted domain . ; GO: 0000166 nucleotide binding, 0004823 leucine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006429 leucyl-tRNA aminoacylation, 0005737 cytoplasm.
Probab=97.67  E-value=1.8e-05  Score=55.99  Aligned_cols=70  Identities=27%  Similarity=0.449  Sum_probs=49.1

Q ss_pred             HHHHHCCCCCCHHHHC-CCC--CCCCCCCCCEEEEEEEEEEEEECCCCCCCHHHHHHHHHHHHCCC--CCCCCCCCCHHH
Q ss_conf             3566479821000000-122--11321013203333102366302245542368999987520000--024443432024
Q gi|254780445|r  412 AALINACAILNRSIVK-HSY--PHSWRSKKPIIFRTTSQWFLHMDKKLGDGSTLRSRALSEVEKIR--FFPSSGKNRLRS  486 (963)
Q Consensus       412 ~~L~e~g~l~~~~~~~-H~y--P~cwR~~~pii~r~~~QWFi~~d~~~~~~~~~k~~~l~~i~~v~--~~P~~~k~r~~~  486 (963)
T Consensus       156 NWCP~d~TVLANEqVi~DS~Gna~SwR~~~~Vekk~l~QW~LKIT-------~YAe~LL~dLe~L~D~W-P~~VK~MQrN  227 (916)
T TIGR00396       156 NWCPNDGTVLANEQVIIDSDGNARSWRGGTPVEKKELKQWFLKIT-------AYAEELLNDLEELDDHW-PESVKEMQRN  227 (916)
T ss_pred             EECCCCCCCCCCHHEEECCCCCCEEECCCCCEEEEECCCCEEHHH-------HHHHHHHHHHHCCCCCC-CHHHHHCCCC
T ss_conf             306777845102030122789853224878446630675101133-------78898541142046788-7313640454


Q ss_pred             HHH
Q ss_conf             430
Q gi|254780445|r  487 MIE  489 (963)
Q Consensus       487 ~i~  489 (963)
T Consensus       228 WIG  230 (916)
T TIGR00396       228 WIG  230 (916)
T ss_pred             CCC
T ss_conf             565