title: Inactivation of erythrocyte Cu-Zn-superoxide dismutase through nonenzymatic glycosylation.
abstract: Human erythrocyte Cu-Zn-superoxide dismutase undergoes glycation reaction in vitro and in vivo (Arai et al., 1987a; Arai et al., 1987b). In addition, an increase in the glycation of the superoxide dismutase was observed in aged erythrocytes, indicating that the glycation reaction is an age-related change under physiological conditions. In the cases of crude extracts as well as pure enzyme preparations obtained from erythrocytes of patients with Werner's syndrome, the specific activity of the glycated form expressed as units per mg Cu-Zn-superoxide dismutase protein as determined by both enzymatic assay and immunoenzymatic assay was significantly lower and the enzyme was unstable as compared to the normal form.
authors.affiliation: Department of Biochemistry, Osaka University Medical School, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Taniquchi
authors.forename: N
authors.initials: N
authors.lastname: Kinoshita
authors.forename: K
authors.initials: K
authors.lastname: Arai
authors.forename: S
authors.initials: S
authors.lastname: Iizuka
authors.forename: M
authors.initials: M
authors.lastname: Usui
authors.forename: T
authors.initials: T
authors.lastname: Naito
mesh_terms: D000328:Adult; D000375:Aging / Q000378:metabolism; D000596:Amino Acids / Q000032:analysis; D004795:Enzyme Stability; D004912:Erythrocytes / Q000201:enzymology*; D006031:Glycosylation; D006358:Hot Temperature; D006801:Humans; D006943:Hyperglycemia / Q000378:metabolism; D008239:Lysine / Q000031:analogs & derivatives / Q000032:analysis; D008297:Male; D010449:Peptide Mapping; D013482:Superoxide Dismutase / Q000097:blood*; D014898:Werner Syndrome / Q000201:enzymology*
chemical_list: D000596:Amino Acids; C034247:glucitollysine; D013482:Superoxide Dismutase; D008239:Lysine