HHsearch alignment for GI: 254780794 and conserved domain: TIGR00456

>TIGR00456 argS arginyl-tRNA synthetase; InterPro: IPR001278 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 . Arginyl-tRNA synthetase (6.1.1.19 from EC) has been crystallized and preliminary X-ray crystallographic analysis of yeast arginyl-tRNA synthetase-yeast tRNAArg complexes is available . ; GO: 0000166 nucleotide binding, 0004814 arginine-tRNA ligase activity, 0005524 ATP binding, 0006412 translation, 0006420 arginyl-tRNA aminoacylation, 0005737 cytoplasm.
Probab=93.53  E-value=0.095  Score=31.82  Aligned_cols=74  Identities=18%  Similarity=0.123  Sum_probs=50.5

Q ss_pred             CEEHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
Q ss_conf             01112121268999999999998761401100000123211134574314322347564303356774111321345544
Q gi|254780794|r  148 HVPVGEDQRQHLEITRLIAQRFNTEFERKIKEVAQKYAQEEQYSKGFFPIIEGLIDSSASRIRSLRDASKKMSKSDSSDF  227 (355)
Q Consensus       148 ~VpVG~DQ~~HieltRdiA~rfN~~yg~~~~~~~~~~~~~~~~~~~~~~~p~~~i~~~~~ri~~L~~~~~KMSKS~~~~~  227 (355)
T Consensus       353 i~V~gsdh~~h~~q~~~~~e~LG~~~~~-----------------------~~L~~~~f~~v~~~~--GKkmkTR~G---  404 (600)
T TIGR00456       353 IYVWGSDHKLHIAQVFAILEKLGYLSKK-----------------------KELEHLEFGMVPLGS--GKKMKTRRG---  404 (600)
T ss_pred             EEEEECCHHHHHHHHHHHHHHCCCCCCC-----------------------CCEEEEEEEEEECCC--CCCCCCCCC---
T ss_conf             9874051888999999999971653788-----------------------616899876432578--885434556---


Q ss_pred             CCCCCCCCHHHHHHHHHHHHCC
Q ss_conf             5200145388999998752001
Q gi|254780794|r  228 SRINLLDNPDIIAKKIQKAKTD  249 (355)
Q Consensus       228 s~I~l~D~~e~I~kKI~ka~TD  249 (355)
T Consensus       405 ~~i~ld~ll~e~~~RA~~~~~~  426 (600)
T TIGR00456       405 NVISLDNLLDEASKRAGNVITK  426 (600)
T ss_pred             CCEEHHHHHHHHHHHHHHHHHH
T ss_conf             6022344689999999999961