Abstract

The amino acid sequence of vitamin D-dependent calcium-binding protein from bovine cerebellum has been determined. It is composed of 260 amino acid residues and its N-terminus is acetylated. The molecular mass is calculated to be 29 851 Da. The presence of six calcium-binding sites (I–VI) has been proposed, two of them (sites II and VI) have lost their calcium-binding function through amino acid replacements, and the other four are able to bind calcium. six calcium-binding domains are supposed to be derived from two gene duplications of the two ancestral calcium-binding domains. In comparison with the sequence of chick intestinal calcium-binding protein deduced from a cDNA sequence [(1985) Nucleic Acids Res. 13, 8867-8881], the bovine calcium-binding protein is two amino acid residues shorter at the N-terminus and the other parts show 78.5% identity.

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