chr6-31860510-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_000434.4(NEU1):c.727G>A(p.Gly243Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000015 in 1,461,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

NEU1
NM_000434.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 7.18

Variant links:

Genes affected

NEU1 (HGNC:7758): (neuraminidase 1) The protein encoded by this gene is a lysosomal enzyme that cleaves terminal sialic acid residues from substrates such as glycoproteins and glycolipids. In the lysosome, this enzyme is part of a heterotrimeric complex together with beta-galactosidase and cathepsin A (the latter is also referred to as 'protective protein'). Mutations in this gene can lead to sialidosis, a lysosomal storage disease that can be type 1 (cherry red spot-myoclonus syndrome or normosomatic type), which is late-onset, or type 2 (the dysmorphic type), which occurs at an earlier age with increased severity. [provided by RefSeq, Jul 2008]

NEU1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.984

PP5

Variant 6-31860510-C-T is Pathogenic according to our data. Variant chr6-31860510-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2450.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null. Variant chr6-31860510-C-T is described in UniProt as null.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEU1	NM_000434.4 link	c.727G>A	p.Gly243Arg	missense_variant	Exon 4 of 6	ENST00000375631.5	NP_000425.1	Q99519Q5JQI0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEU1	ENST00000375631.5 link	c.727G>A	p.Gly243Arg	missense_variant	Exon 4 of 6	1	NM_000434.4	ENSP00000364782.4		Q99519

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000795

AC:

AN:

251446

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000150

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

727236

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000162

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:3

Sep 20, 2023

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies found this variant is associated with significantly reduced enzyme activity and mislocalization (Naganawa Y et al., 2000); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 34426522, 16538002, 10944856, 11829139, 34992946, 32472645, 19415310) -

Jun 28, 2013

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 243 of the NEU1 protein (p.Gly243Arg). This variant is present in population databases (rs104893983, gnomAD 0.007%). This missense change has been observed in individual(s) with sialidosis type I (PMID: 10944856, 19415310). ClinVar contains an entry for this variant (Variation ID: 2450). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt NEU1 protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects NEU1 function (PMID: 10944856). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Sialidosis type 1

Pathogenic:1

Jan 01, 2000

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.58

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.40

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.97

Eigen

Uncertain

0.63

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Uncertain

0.96

M_CAP

Uncertain

0.22

MetaRNN

Pathogenic

0.98

MetaSVM

Uncertain

0.78

MutationAssessor

Pathogenic

3.1

PrimateAI

Uncertain

0.60

PROVEAN

Pathogenic

-6.1

REVEL

Pathogenic

0.79

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.056

Polyphen

0.98

Vest4

0.99

MutPred

0.94

Loss of glycosylation at S244 (P = 0.0532);

MVP

0.99

MPC

1.5

ClinPred

0.99

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.58

gMVP

0.94

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over