rs28940569
Variant summary
Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1PM2PP3_StrongPP5_Very_Strong
The NM_018941.4(CLN8):c.789G>C(p.Trp263Cys) variant causes a missense 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: 33)
Consequence
CLN8
NM_018941.4 missense
NM_018941.4 missense
Scores
12
5
1
Clinical Significance
Conservation
PhyloP100: 9.30
Genes affected
CLN8 (HGNC:2079): (CLN8 transmembrane ER and ERGIC protein) This gene encodes a transmembrane protein belonging to a family of proteins containing TLC domains, which are postulated to function in lipid synthesis, transport, or sensing. The protein localizes to the endoplasmic reticulum (ER), and may recycle between the ER and ER-Golgi intermediate compartment. Mutations in this gene are associated with a disorder characterized by progressive epilepsy with cognitive disabilities (EPMR), which is a subtype of neuronal ceroid lipofuscinoses (NCL). Patients with mutations in this gene have altered levels of sphingolipid and phospholipids in the brain. [provided by RefSeq, Jul 2017]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 16 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 9 uncertain in NM_018941.4
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.987
PP5
?
Variant 8-1780495-G-C is Pathogenic according to our data. Variant chr8-1780495-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 2803.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr8-1780495-G-C is described in UniProt as null. Variant chr8-1780495-G-C is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CLN8 | NM_018941.4 | c.789G>C | p.Trp263Cys | missense_variant | 3/3 | ENST00000331222.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CLN8 | ENST00000331222.6 | c.789G>C | p.Trp263Cys | missense_variant | 3/3 | 1 | NM_018941.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Feb 01, 2017 | - - |
Neuronal ceroid lipofuscinosis 8 Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Jan 01, 2004 | - - |
Neuronal ceroid lipofuscinosis Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Oct 11, 2023 | This sequence change replaces tryptophan, which is neutral and slightly polar, with cysteine, which is neutral and slightly polar, at codon 263 of the CLN8 protein (p.Trp263Cys). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with neuronal ceroid lipofuscinosis (PMID: 15024724). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 2803). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt CLN8 protein function. For these reasons, this variant has been classified as Pathogenic. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
DEOGEN2
Uncertain
D;D;D;D;D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D;D;D;D
MetaSVM
Pathogenic
D
MutationAssessor
Uncertain
M;M;M;M;M
MutationTaster
Benign
A
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;.;.;.;.
REVEL
Pathogenic
Sift
Pathogenic
D;.;.;.;.
Sift4G
Pathogenic
D;.;.;.;.
Polyphen
D;D;D;D;D
Vest4
MutPred
Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
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