Hiraoka BY, Fukasawa K, Fukasawa KM, Harada M. Identification and quantification of alpha-amino adipic acid in bovine dentine phosphoprotein.
J Biochem 1980;
88:373-7. [PMID:
7419498 DOI:
10.1093/oxfordjournals.jbchem.a132982]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
A unique phosphoprotein, which contains an uncommon amino acid, alpha-amino adipic acid (alpha-AAA), was isolated from unerupted bovine teeth by extensive EDTA demineralization. The alpha-AAA in the protein hydrolysates was identified based on the elution time on an amino acid analyzer using the sodium and lithium citrate buffer in a dual column system, and its identity was confirmed by comparisons of its DNS derivative with that of authentic alpha-AAA. This result suggests that the lysine residues in the phosphoprotein may be deaminated by an amine oxidase into allysine and further oxidized to alpha-AAA.
Collapse