Hereditary cerebral amyloid angiopathy: the amyloid fibrils contain a protein which is a variant of cystatin C, an inhibitor of lysosomal cysteine proteases.
Hereditary Cerebral Hemorrhage With Amyloidosis is an autosomal dominant form of amyloidosis restricted to the cerebral vasculature. We have previously demonstrated that the amyloid protein subunit is similar to Cystatin C (or gamma-trace), an inhibitor of lysosomal cysteine proteinases, and homologous to kininogens. High pressure liquid chromatography tryptic fingerprint analysis was developed to distinguish Cystatin C from the amyloid protein. Moreover, we isolated and sequenced tryptic peptides in which the differences were detected. The data prove that the amyloid protein is 10 residues shorter than Cystatin C and has one amino acid substitution at residue 58.
J
J
Ghiso
B
B
Pons-Estel
B
B
Frangione
D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000682:Amyloid / Q000032:analysis* / Q000378:metabolism; D000686:Amyloidosis / Q000150:complications / Q000235:genetics / Q000378:metabolism*; D002543:Cerebral Hemorrhage / Q000209:etiology*; D002851:Chromatography, High Pressure Liquid; D055316:Cystatin C; D015891:Cystatins; D006801:Humans; D046911:Macromolecular Substances; D010446:Peptide Fragments / Q000378:metabolism; D011506:Proteins / Q000032:analysis*; D011507:Proteinuria; D014357:Trypsin / Q000378:metabolism
D000596:Amino Acids; D000682:Amyloid; C525030:CST3 protein, human; D055316:Cystatin C; D015891:Cystatins; D046911:Macromolecular Substances; D010446:Peptide Fragments; D011506:Proteins; D014357:Trypsin