1993-11-01
Applications of a new fluorimetric enzyme assay for the diagnosis of aspartylglucosaminuria
Publication
Publication
Journal of Inherited Metabolic Disease , Volume 16 - Issue 6 p. 929- 934
L-Aspartic acid-β-7-amido-4-methylcoumarin is a sensitive and specific fluorogenic substrate for lysosomal glycoasparaginase (aspartylgluco-saminidase). Fibroblasts and leukocytes from 8 patients with aspartylglucosaminuria, showed 1-7% of the mean normal glycoasparaginase activity. Heterozygotes showed intermediate activities. Glycoasparaginase activity in chorionic villi, cultured trophoblasts, cultured amniotic fluid cells and amniotic fluid was readily detectable, indicating that prenatal analysis of aspartylglucosaminuria should be possible with this assay. β-Aspartyl-4-methylumbelliferone was synthesized but this potential substrate can not be used to assay glycoasparaginase since it hydrolyses spontaneously.
| Additional Metadata | |
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| doi.org/10.1007/BF00711507, hdl.handle.net/1765/60063 | |
| Journal of Inherited Metabolic Disease | |
| Organisation | Department of Clinical Genetics |
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Vozyi, Y., Keulemans, J. L. M., Lleijer, W., Aula, P., Gray, G., & van Diggelen, O. (1993). Applications of a new fluorimetric enzyme assay for the diagnosis of aspartylglucosaminuria. Journal of Inherited Metabolic Disease, 16(6), 929–934. doi:10.1007/BF00711507 |
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