RPSBLAST alignment for GI: 254780889 and conserved domain: cd04585

>gnl|CDD|73085 cd04585, CBS_pair_ACT_assoc2, This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains in the acetoin utilization proteins in bacteria. Acetoin is a product of fermentative metabolism in many prokaryotic and eukaryotic microorganisms. They produce acetoin as an external carbon storage compound and then later reuse it as a carbon and energy source during their stationary phase and sporulation. In addition these CBS domains are associated with a downstream ACT domain, which is linked to a wide range of metabolic enzymes that are regulated by amino acid concentration. Pairs of ACT domains bind specifically to a particular amino acid leading to regulation of the linked enzyme. CBS is a small domain originally identified in cystathionine beta-synthase and subsequently found in a wide range of different proteins. CBS domains usually come in tandem repeats, which associate to form a so-called Bateman domain or a CBS pair which is reflected in this model. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown.. Length = 122
 Score = 38.6 bits (90), Expect = 0.003
 Identities = 26/94 (27%), Positives = 45/94 (47%), Gaps = 4/94 (4%)

Query: 161 RNLITVKKTVNLENAKALLHQHRIEKLLVVDDDGCCIGLITVKDIERSQLNPNATKDSKG 220
           +N ITV    +L  A  L+ ++ I +L VV D G  +G++T +D++ +  +   T D   
Sbjct: 1   KNPITVTPDTSLMEALKLMKENSIRRLPVV-DRGKLVGIVTDRDLKLASPSKATTLDIWE 59

Query: 221 RLRVAAAVSVAKDIADRVGPLFDVNVDLVVVDTA 254
              + + + V  DI  R      V+ D  V + A
Sbjct: 60  LYYLLSKIKV-SDIMTR--DPITVSPDASVEEAA 90