RPSBLAST alignment for GI: 255764505 and conserved domain: cd04584

>gnl|CDD|73084 cd04584, CBS_pair_ACT_assoc, 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 = 121
 Score = 58.3 bits (141), Expect = 3e-09
 Identities = 32/110 (29%), Positives = 55/110 (50%), Gaps = 12/110 (10%)

Query: 239 LIDAITILSEKRFGCVAVVDEGQKLKGIITEGDIFRNFHKDLNTLS-----------VED 287
           + +A+ ++ E +   + VVDE  +L GI+T+ D+         TLS           V++
Sbjct: 12  IAEALELMREHKIRHLPVVDEEGRLVGIVTDRDLRDASPSPFTTLSEHELYLLLKMPVKE 71

Query: 288 VMIKNPKVILEDTLLTVAMQLLRQHNISVLMVVDDCQKAIGIVHFLDLLR 337
           +M K+   +     +  A  L+R+H I  L VV+D  + +GI+   DLLR
Sbjct: 72  IMTKDVITVHPLDTVEEAALLMREHRIGCLPVVED-GRLVGIITETDLLR 120