title: Nuclear magnetic resonance assignments and secondary structure of bovine S100 beta protein.
abstract: S100 beta is a neurite extension factor and has been implicated in Alzheimer's disease and Down's syndrome. It belongs to a group of low molecular weight calcium-binding proteins containing the helix-loop-helix calcium binding motif. The structure of only one S100 protein, calbindin D9k, which has the lowest sequence similarity to the other members of the S100 group has been determined. We report the NMR assignments and secondary structure of calcium-free S100 beta. The secondary structure is similar to that of calbindin D9k, determined using NMR, except that there is clear evidence for an additional well ordered 5-residue alpha-helix in S100 beta.
authors.affiliation: Department of Biochemistry, University of Leicester, UK.
authors.forename: P M
authors.initials: PM
authors.lastname: Kilby
authors.forename: L J
authors.initials: LJ
authors.lastname: Van Eldik
authors.forename: G C
authors.initials: GC
authors.lastname: Roberts
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D002118:Calcium / Q000378:metabolism; D002135:Calcium-Binding Proteins / Q000737:chemistry* / Q000235:genetics; D002417:Cattle; D004247:DNA / Q000737:chemistry; D015870:Gene Expression; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009414:Nerve Growth Factors; D017433:Protein Structure, Secondary; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000737:chemistry* / Q000235:genetics
chemical_list: D002135:Calcium-Binding Proteins; D009414:Nerve Growth Factors; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins; D004247:DNA; D002118:Calcium