>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 = 49.8 bits (119), Expect = 2e-06
 Identities = 19/48 (39%), Positives = 31/48 (64%), Gaps = 2/48 (4%)

Query: 98  MVVNPVTISPYATLADALALMKKYSISGIPVVESDVGKLVGILTNRDV 145
           M  + +T+ P  T+ +A  LM+++ I  +PVVE   G+LVGI+T  D+
Sbjct: 73  MTKDVITVHPLDTVEEAALLMREHRIGCLPVVED--GRLVGIITETDL 118