>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 = 51.3 bits (123), Expect = 6e-07
 Identities = 32/90 (35%), Positives = 49/90 (54%), Gaps = 10/90 (11%)

Query: 57  VTDSRLAIAMA-QAGGLGVIHRNFSPSEQVAQVHQVKKFESGMVVNPVTISPYATLADAL 115
           VTD  L +A   +A  L +    +  S+         K    M  +P+T+SP A++ +A 
Sbjct: 39  VTDRDLKLASPSKATTLDIWELYYLLSKI--------KVSDIMTRDPITVSPDASVEEAA 90

Query: 116 ALMKKYSISGIPVVESDVGKLVGILTNRDV 145
            LM +  ISG+PVV+ D G+LVGI+T  D+
Sbjct: 91  ELMLERKISGLPVVD-DQGRLVGIITESDL 119