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Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Hofer, D; Paul, K; Fantur, K; Beck, M; Burger, F; Caillaud, C; Fumic, K; Ledvinova, J; Lugowska, A; Michelakakis, H; Radeva, B; Ramaswami, U; Plecko, B; Paschke, E.
GM1 Gangliosidosis and Morquio B Disease: Expression Analysis of Missense Mutations Affecting the Catalytic Site of Acid beta-Galactosidase
HUM MUTAT. 2009; 30(8): 1214-1221.
Doi: 10.1002/humu.21031
Web of Science
PubMed
FullText
FullText_MUG
- Führende Autor*innen der Med Uni Graz
- Hofer Doris
- Paschke Eduard
- Co-Autor*innen der Med Uni Graz
- Fantur Katrin Medea-Emma
- Paul Karl
- Plecko Barbara
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- Abstract:
- Alterations in GLB1, the gene coding for acid beta-D-galactosidase (beta-Gal), can result in GM1 gangliosidosis (GM1), a neurodegenerative disorder, or in Morquio B disease (MBD), a phenotype with dysostosis multiplex and normal central nervous system (CNS) function. While most MBD patients carry a common allele, c.817TG>CT (p.W273L), only few of the >100 mutations known in GM1 can be related to a certain phenotype. In 25 multiethnic patients with GM1 or MBD, 11 missense mutations were found as well as one novel insertion and a transversion causing aberrant gene products. Except c.602G>A (p.R201H) and two novel alleles, c.592G>T (p.D198Y) and c.1189C>G (p.P397A), all mutants resulted in significantly reduced beta-Gal activities (<10% of normal) upon expression in COS-1 cells. Although c.997T>C (p.Y333H) expressed 3% of normal activity, the mutant protein was localized in the lysosomal-endosomal compartment. A homozygous case presented with late infantile GM1, while a heterozygous, juvenile case carried p.Y333H together with p.R201H. This allele, recently found in homozygous MBD, gives rise to rough endoplasmic reticulum (RER)-located beta-Gal precursors. Thus, unlike classical MBD, the phenotype of heterozygotes carrying p.R201H may rather be determined by poorly active, properly transported products of the counter allele than by the mislocalized p.R201H precursors.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Blotting, Western -
- COS Cells -
- Catalytic Domain -
- Cercopithecus aethiops -
- Child -
- Child, Preschool -
- Electrophoresis, Polyacrylamide Gel -
- Gangliosidosis, GM1 - genetics
- Gene Expression Profiling -
- Genotype -
- Humans -
- Infant -
- Mucopolysaccharidosis IV - genetics
- Mutation, Missense -
- Phenotype -
- beta-Galactosidase - chemistry
- beta-Galactosidase - genetics
- beta-Galactosidase - metabolism
- Find related publications in this database (Keywords)
- GLB1
- GM1 gangliosidosis
- mucopolysaccharidosis type IVB
- phenotype-genotype relations