>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 = 66.4 bits (162), Expect = 1e-11
 Identities = 33/112 (29%), Positives = 56/112 (50%), Gaps = 13/112 (11%)

Query: 238 PLIDAITILSEKRFGCVAVVDEGQKLKGIITEGDIFR------------NFHKDLNTLSV 285
            L++A+ ++ E     + VVD G KL GI+T+ D+                +  L+ + V
Sbjct: 11  SLMEALKLMKENSIRRLPVVDRG-KLVGIVTDRDLKLASPSKATTLDIWELYYLLSKIKV 69

Query: 286 EDVMIKNPKVILEDTLLTVAMQLLRQHNISVLMVVDDCQKAIGIVHFLDLLR 337
            D+M ++P  +  D  +  A +L+ +  IS L VVDD  + +GI+   DL R
Sbjct: 70  SDIMTRDPITVSPDASVEEAAELMLERKISGLPVVDDQGRLVGIITESDLFR 121