CBS domains are small intracellular modules that pair together to form a stable globular domain [2]. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain [6]. CBS domains have been shown to bind ligands with an adenosyl group such as AMP, ATP and S-AdoMet [5]. CBS domains are found attached to a wide range of other protein domains suggesting that CBS domains may play a regulatory role making proteins sensitive to adenosyl carrying ligands. The region containing the CBS domains in Cystathionine-beta synthase is involved in regulation by S-AdoMet [4]. CBS domain pairs from AMPK bind AMP or ATP [5]. The CBS domains from IMPDH and the chloride channel CLC2 bind ATP [5].

1: The structure of a domain common to archaebacteria and the homocystinuria disease protein. Bateman A; Trends Biochem Sci 1997;22:12-13. PMID:9020585

2: Characteristics and crystal structure of bacterial inosine-5'-monophosphate dehydrogenase. Zhang R, Evans G, Rotella FJ, Westbrook EM, Beno D, Huberman E, Joachimiak A, Collart FR; Biochemistry 1999;38:4691-4700. PMID:10200156

3: CBS domains in ClC chloride channels implicated in myotonia and nephrolithiasis (kidney stones). Ponting CP; J Mol Med 1997;75:160-163. PMID:9106071

4: Regulation of human cystathionine beta-synthase by S-adenosyl-L-methionine: evidence for two catalytically active conformations involving an autoinhibitory domain in the C-terminal region. Janosik M, Kery V, Gaustadnes M, Maclean KN, Kraus JP Biochemistry 2001;40:10625-10633. PMID:11524006

5: CBS domains form energy-sensing modules whose binding of adenosine ligands is disrupted by disease mutations. Scott JW, Hawley SA, Green KA, Anis M, Stewart G, Scullion GA, Norman DG, Hardie DG; J Clin Invest 2004;113:274-284. PMID:14722619

6: Bateman domains and adenosine derivatives form a binding contract. Kemp BE; J Clin Invest 2004;113:182-184. PMID:14722609