Description:
MUCOLIPIDOSIS II; ML2; ML II
N-ACETYLGLUCOSAMINE-1-PHOSPHOTRANSFERASE, ALPHA/BETA SUBUNITS; GNPTAB
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Repository
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NIGMS Human Genetic Cell Repository
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| Subcollection |
Heritable Diseases
Lysosomal Storage Diseases |
| Class |
Disorders of Carbohydrate Metabolism |
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Cell Type
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Fibroblast
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Transformant
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Untransformed
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Race
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White
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Family Member
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3
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Relation to Proband
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mother
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Confirmation
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Clinical summary/Case history
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Species
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Homo sapiens
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Common Name
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Human
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Remarks
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| Passage Frozen |
7 |
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| Gene |
GNPTAB |
| Chromosomal Location |
12q23.3 |
| Allelic Variant 1 |
607840.0011; MUCOLIPIDOSIS II |
| Identified Mutation |
2-BP DEL, 3665TC; In 8 of 9 pedigrees with ML II (252500) and 5 of 7 with ML IIIA (252600), Kudo et al. (Am J Hum Genet 78:451-463, 2006) identified a frameshift mutation in the GNPTAB gene consisting of deletion of 2 nucleotides (3665_3666delTC) beginning at leu1168 and leading to premature termination at amino acid 1172 (L1168fsX1172). This mutation was the most frequent in their study and was found in both the homozygous and compound heterozygous state, in combination with severe mutations (i.e., mutations preventing the generation of active enzyme) in ML II and with mild mutations (i.e., mutations allowing the generation of active enzyme) in ML IIIA. |
| Remarks |
Heterozygote level of N-acetylglucosaminylphosphotransferase; clinically unaffected mother of GM01586C; GlcNAc-Phosphotransferase activity = 78% (measured as specific activity in cell lysate and reported as percentage of activity in normal fibroblasts); donor subject has one allele which has a 2-bp deletion in exon 19 of the GNPTAB gene [3665_3666delTC] resulting in a frameshift and truncation of the protein in the beta subunit [L1168fsX1172]. |
| Flint M, Chatterjee P, Lin DL, McMullan LK, Shrivastava-Ranjan P, Bergeron É, Lo MK, Welch SR, Nichol ST, Tai AW, Spiropoulou CF, A genome-wide CRISPR screen identifies N-acetylglucosamine-1-phosphate transferase as a potential antiviral target for Ebola virus Nature communications10:285 2018 |
| PubMed ID: 30655525 |
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| Kudo M, Brem MS, Canfield WM, Mucolipidosis II (I-Cell Disease) and Mucolipidosis IIIA (Classical Pseudo-Hurler Polydystrophy) Are Caused by Mutations in the GlcNAc-Phosphotransferase alpha / beta -Subunits Precursor Gene. Am J Hum Genet78(3):451-63 2006 |
| PubMed ID: 16465621 |
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| Robey PG, Neufeld EF, Defective phosphorylation and processing of beta-hexosaminidase by intact cultured fibroblasts from patients with mucolipidosis III. Arch Biochem Biophys213:251-7 1982 |
| PubMed ID: 6460470 |
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| Varki A, Reitman ML, Vannier A, Kornfeld S, Grubb JH, Sly WS, Demonstration of the heterozygous state for I-cell disease and pseudo- Hurler polydystrophy by assay of N-acetylglucosaminylphosphotransferase in white blood cells and fibroblasts. Am J Hum Genet34:717-29 1982 |
| PubMed ID: 6289658 |
| Passage Frozen |
7 |
| Split Ratio |
1:3 |
| Temperature |
37 C |
| Percent CO2 |
5% |
| Medium |
Eagle's Minimum Essential Medium with Earle's salts and non-essential amino acids with 2mM L-glutamine or equivalent |
| Serum |
15% fetal bovine serum Not inactivated |
| Substrate |
None specified |
| Subcultivation Method |
trypsin-EDTA |
| Supplement |
- |
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