rs398123244
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PM4PP5
The NM_000199.5(SGSH):c.1144_1145insAGCGCC(p.His381_Arg382insGlnArg) variant causes a inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000044 in 1,613,840 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)
Exomes 𝑓: 0.000047 ( 0 hom. )
Consequence
SGSH
NM_000199.5 inframe_insertion
NM_000199.5 inframe_insertion
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 0.589
Genes affected
SGSH (HGNC:10818): (N-sulfoglucosamine sulfohydrolase) This gene encodes the enzyme sulfamidase; one of several enzymes involved in the lysosomal degradation of heparan sulfate. Mutations in this gene are associated with the lysosomal storage disease mucopolysaccaridosis IIIA, also known as Sanfilippo syndrome A, which results from impaired degradation of heparan sulfate. Transcripts of varying sizes have been reported but their biological validity has not been determined. [provided by RefSeq, Jun 2017]
CARD14 (HGNC:16446): (caspase recruitment domain family member 14) This gene encodes a caspase recruitment domain-containing protein that is a member of the membrane-associated guanylate kinase (MAGUK) family of proteins. Members of this protein family are scaffold proteins that are involved in a diverse array of cellular processes including cellular adhesion, signal transduction and cell polarity control. This protein has been shown to specifically interact with BCL10, a protein known to function as a positive regulator of cell apoptosis and NF-kappaB activation. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2012]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 8 uncertain in NM_000199.5
PM2
?
Very rare variant in population databases, with high coverage;
PM4
?
Nonframeshift variant in NON repetitive region in NM_000199.5.
PP5
?
Variant 17-80210816-C-CGGCGCT is Pathogenic according to our data. Variant chr17-80210816-C-CGGCGCT is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 92608.We mark this variant Likely_pathogenic, oryginal submissions are: {Pathogenic=3, Uncertain_significance=1, Likely_pathogenic=2}.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SGSH | NM_000199.5 | c.1144_1145insAGCGCC | p.His381_Arg382insGlnArg | inframe_insertion | 8/8 | ENST00000326317.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SGSH | ENST00000326317.11 | c.1144_1145insAGCGCC | p.His381_Arg382insGlnArg | inframe_insertion | 8/8 | 1 | NM_000199.5 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000131 AC: 2AN: 152138Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.0000159 AC: 4AN: 251032Hom.: 0 AF XY: 0.0000147 AC XY: 2AN XY: 135850
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GnomAD4 exome AF: 0.0000472 AC: 69AN: 1461702Hom.: 0 Cov.: 34 AF XY: 0.0000426 AC XY: 31AN XY: 727136
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:5Uncertain:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Mucopolysaccharidosis, MPS-III-A Pathogenic:4
Likely pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Nov 07, 2021 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Mar 09, 2023 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jan 13, 2024 | This variant, c.1144_1145insAGCGCC, results in the insertion of 2 amino acid(s) of the SGSH protein (p.His381_Arg382insGlnArg), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs398123244, gnomAD 0.007%). This variant has been observed in individual(s) with mucopolysaccharidosis type III (PMID: 11182930, 27590925). This variant is also known as 1156ins6. ClinVar contains an entry for this variant (Variation ID: 92608). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. For these reasons, this variant has been classified as Pathogenic. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | Jun 29, 2017 | - - |
not provided Pathogenic:1Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Mar 12, 2013 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Aug 14, 2022 | In-frame insertion of 2 amino acids in a non-repeat region; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 21963080, 11182930, 27590925, 34991944) - |
Computational scores
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Find out detailed SpliceAI scores and Pangolin per-transcript scores at