1. Hexosaminidase C has been purified from human placenta. Complete separation from hexosaminidases A and B was achieved. 2. The following properties of hexosaminidase C differ from those of the A and B isozymes. Presence in the supernatant rather than the lysosomes, neutral pH optimum, higher molecular weight, lack of activity on beta-N-acetylgalactosamine derivatives, and lack of immunological relationship. 3. Hexosaminidase C is active in patients deficient in hexosaminidases A and B and can be recognized by its characteristic electrophoretic mobility. It is concluded that the genetic origin of hexosaminidase C is probably different from that of hexosaminidases A and B.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0005-2744(75)90162-x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Brain Transcriptome Changes Associated With an Acute Increase of Protein O-GlcNAcylation and Implications for Neurodegenerative Disease.
J Neurochem
January 2025
Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA.
Enhancing protein O-GlcNAcylation by pharmacological inhibition of the enzyme O-GlcNAcase (OGA) has been considered as a strategy to decrease tau and amyloid-beta phosphorylation, aggregation, and pathology in Alzheimer's disease (AD). There is still more to be learned about the impact of enhancing global protein O-GlcNAcylation, which is important for understanding the potential of using OGA inhibition to treat neurodegenerative diseases. In this study, we investigated the acute effect of pharmacologically increasing O-GlcNAc levels, using the OGA inhibitor Thiamet G (TG), in normal mouse brains.
View Article and Find Full Text PDFDiagnosing Late-Onset Tay-Sachs Through Next Generation Sequencing and Functional Enzyme Testing: From Genes to Enzymes.
Neurol Genet
December 2024
From the School of Medicine (A.R.T., J.R.), The University of Queensland; Department of Neurology (W.R., P.A.M., R.D.H., L.V.), Royal Brisbane & Women's Hospital; The University of Queensland (P.A.M., R.D.H., L.V.), UQ Centre for Clinical Research; and Genetic Health Queensland (J.R.), Royal Brisbane & Women's Hospital, Brisbane, Queensland, Australia.
Tay-Sachs disease is a neurodegenerative disorder characterized by progressive neurologic impairment due to pathogenic variants in the gene that codes for the alpha subunit of β-hexosaminidase. We report 2 cases of adult-onset progressive weakness, ataxia, and neuropsychiatric symptoms in a 30-year-old man and 37-year-old woman. Both patients had compound heterozygosity in the gene with 4 distinct variants.
View Article and Find Full Text PDFGM2 gangliosidosis is lysosomal storage disorder caused by deficiency of the heterodimeric enzyme β-hexosaminidase A. Tay-Sachs disease is caused by variants in encoding the α-subunit and Sandhoff disease is caused by variants in encoding the β-subunit. Due to shared clinical and biochemical findings, the two have been considered indistinguishable.
View Article and Find Full Text PDFA Simplified Method for Evaluating Chitin-Binding Activity Applied to YKL-40 (HC-gp39, CHI3L1) and Chitotriosidase.
Molecules
December 2024
Department of Chemistry and Life Science, Kogakuin University, Tokyo 192-0015, Japan.
YKL-40 is structurally similar to chitotriosidase (CHIT1), an active chitinase, but it lacks chitin-degrading activity while retaining chitin-binding capability. Elevated YKL-40 levels are associated with inflammatory diseases and cancers, making it a valuable biomarker. We previously reported that the W69T substitution in YKL-40 significantly reduces its chitin-binding affinity, identifying W69 as a crucial binding site.
View Article and Find Full Text PDFDysregulation of the NLRP3 Inflammasome and Promotion of Disease by IL-1β in a Murine Model of Sandhoff Disease.
Cells
January 2025
Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK.
Sandhoff disease (SD) is a progressive neurodegenerative lysosomal storage disorder characterized by GM2 ganglioside accumulation as a result of mutations in the gene, which encodes the β-subunit of the enzyme β-hexosaminidase. Lysosomal storage of GM2 triggers inflammation in the CNS and periphery. The NLRP3 inflammasome is an important coordinator of pro-inflammatory responses, and we have investigated its regulation in murine SD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!