Description:
MUCOLIPIDOSIS IV
MUCOLIPIN 1; MCOLN1
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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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Ethnicity
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ASHKENAZI
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Relation to Proband
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proband
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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 |
15 |
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| IDENTIFICATION OF SPECIES OF ORIGIN |
Species of Origin Confirmed by Nucleoside Phosphorylase Isoenzyme Electrophoresis |
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| Gene |
MCOLN1 |
| Chromosomal Location |
19p13.3-p13.2 |
| Allelic Variant 1 |
605248.0002; MUCOLIPIDOSIS IV |
| Identified Mutation |
6,450-BP DEL; In 1 of 21 Ashkenazi Jewish patients with mucolipidosis IV (252650) associated with the minor founder haplotype defined by Slaugenhaupt et al. (Am J Hum Genet 65:773-778, 1999), Bargal et al. (Nat Genet 26:118-121, 2000) identified a homozygous 6,450-bp deletion in the MCOLN1 gene. The deletion spanned a region from 928 bp upstream from the first exon of MCOLN1 to bp 31 of exon 7 (del EX1-EX7). |
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| Gene |
MCOLN1 |
| Chromosomal Location |
19p13.3-p13.2 |
| Allelic Variant 2 |
605248.0001; MUCOLIPIDOSIS IV |
| Identified Mutation |
IVS3AS,A>G,-2; In 12 of 21 Ashkenazi Jewish patients with mucolipidosis IV (252650) associated with the major Ashkenazi founder haplotype defined by Slaugenhaupt et al. (Am J Hum Genet 65:773-778, 1999), Bargal et al. (Nat Genet 26:118-121, 2000) identified a homozygous A-to-G transition in the acceptor splice site of the third intron of the MCOLN1 gene. One heterozygote was found among 60 Ashkenazi normal controls; this was consistent with the estimated frequency of heterozygotes (1/50) in this population. Bassi et al. (Am J Hum Genet 67:1110-1120, 2000) identified this acceptor splice site mutation, which they designated 486-2A-G, as the major founder mutation in Ashkenazi Jewish patients. The mutation disrupted the GT-AG rule of splicing and resulted in a transcript lacking 165 bp, because of the skipping of exon 4. This caused a frameshift leading to a premature translation termination 374 bp downstream. The predicted truncated protein retained only the first 21 amino acids of the wildtype protein. |
| Remarks |
Ashkenazi; clinically affected |
| Scotto Rosato A, Montefusco S, Soldati C, Di Paola S, Capuozzo A, Monfregola J, Polishchuk E, Amabile A, Grimm C, Lombardo A, De Matteis MA, Ballabio A, Medina DL, TRPML1 links lysosomal calcium to autophagosome biogenesis through the activation of the CaMKKß/VPS34 pathway Nature communications10:5630 2018 |
| PubMed ID: 31822666 |
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| Hantash FM, Olson SC, Anderson B, Buller A, Chen R, Crossly B, Sun W, Strom CM, Rapid one-step carrier detection assay of mucolipidosis IV mutations in the Ashkenazi Jewish population The Journal of molecular diagnostics : JMD8:282-7 2006 |
| PubMed ID: 16645217 |
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| Bassi MT, Manzoni M, Monti E, Pizzo MT, Ballabio A, Borsani G, Cloning of the gene encoding a novel integral membrane protein, mucolipidin-and identification of the two major founder mutations causing mucolipidosis type IV. Am J Hum Genet67(5):1110-20 2000 |
| PubMed ID: 11013137 |
| Passage Frozen |
15 |
| 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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