title: NAD-binding domains of dehydrogenases.
abstract: The nicotinamide adenine dinucleotide (NAD)-binding domains of dehydrogenases, containing a conserved double beta-alpha-beta-alpha-beta motif, are common structural feature of many enzymes that bind NAD, nicotinamide adenine dinucleotide phosphate (NADP) and related cofactors. Features of this folding pattern that create a natural binding site for such molecules have been described. The domain continues to appear in many structures, in the form of a common core with different peripheral additions or variations. Other structures that bind NAD and related molecules use entirely different topologies, although, in many, a phosphate group appears at the N terminus of an alpha helix. Ferredoxin reductase seems to show convergent evolution, containing a single beta-alpha-beta motif that is similar both in its structure and in its interactions with the ligand to a region in dehydrogenases.
authors: University of Cambridge Clinical School, UK.
authors: A M
authors: AM
authors: Lesk
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009243:NAD / Q000378:metabolism*; D009249:NADP / Q000378:metabolism; D010088:Oxidoreductases / Q000737:chemistry* / Q000378:metabolism; D017510:Protein Folding; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary
chemical_list: D009243:NAD; D009249:NADP; D010088:Oxidoreductases