rs386833668
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_StrongPM2PP5_Moderate
The NM_000310.4(PPT1):c.871C>T(p.Gln291Ter) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 32)
Consequence
PPT1
NM_000310.4 stop_gained
NM_000310.4 stop_gained
Scores
5
1
1
Clinical Significance
Conservation
PhyloP100: 9.72
Genes affected
PPT1 (HGNC:9325): (palmitoyl-protein thioesterase 1) The protein encoded by this gene is a small glycoprotein involved in the catabolism of lipid-modified proteins during lysosomal degradation. The encoded enzyme removes thioester-linked fatty acyl groups such as palmitate from cysteine residues. Defects in this gene are a cause of infantile neuronal ceroid lipofuscinosis 1 (CLN1, or INCL) and neuronal ceroid lipofuscinosis 4 (CLN4). Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Dec 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
PVS1
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 4 pathogenic variants in the truncated region.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 1-40074111-G-A is Pathogenic according to our data. Variant chr1-40074111-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 56217.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-40074111-G-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
PPT1 | NM_000310.4 | c.871C>T | p.Gln291Ter | stop_gained | 9/9 | ENST00000642050.2 | NP_000301.1 | |
PPT1 | NM_001363695.2 | c.799C>T | p.Gln267Ter | stop_gained | 8/8 | NP_001350624.1 | ||
PPT1 | NM_001142604.2 | c.562C>T | p.Gln188Ter | stop_gained | 6/6 | NP_001136076.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PPT1 | ENST00000642050.2 | c.871C>T | p.Gln291Ter | stop_gained | 9/9 | NM_000310.4 | ENSP00000493153 | P1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:2
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Neuronal ceroid lipofuscinosis 1 Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | May 02, 2019 | Variant summary: PPT1 c.871C>T (p.Gln291X) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. A truncation downstream of this position (p.W296X) has been reported in a patient (PMID: 9664077). The variant was absent in 251410 control chromosomes (gnomAD). c.871C>T has been reported in the literature in a compound heterozygote individual affected with Neuronal Ceroid-Lipofuscinosis (Batten Disease), who had another truncating variant in trans (Waliany 2000). This patient had undetectable enzyme activity, and disease specific electronmicroscopic findings (Waliany 2000). No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as pathogenic. - |
Likely pathogenic, no assertion criteria provided | literature only | Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM) | - | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
MutationTaster
Benign
D;D;D
Vest4
0.74, 0.70
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at