>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 = 85.2 bits (211), Expect = 4e-17
 Identities = 47/119 (39%), Positives = 73/119 (61%), Gaps = 16/119 (13%)

Query: 101 NPVTISPYATLADALALMKKYSISGIPVVESDVGKLVGILTNRDVRFAS----------- 149
           + VTI+P  T+A+AL LM+++ I  +PVV+ + G+LVGI+T+RD+R AS           
Sbjct: 2   DVVTITPTTTIAEALELMREHKIRHLPVVDEE-GRLVGIVTDRDLRDASPSPFTTLSEHE 60

Query: 150 ---NAQQAVGELMTRNLITVKKTVNLENAKALLHQHRIEKLLVVDDDGCCIGLITVKDI 205
                +  V E+MT+++ITV     +E A  L+ +HRI  L VV +DG  +G+IT  D+
Sbjct: 61  LYLLLKMPVKEIMTKDVITVHPLDTVEEAALLMREHRIGCLPVV-EDGRLVGIITETDL 118