21-37232386-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_006052.2(VPS26C):​c.498C>A​(p.Asn166Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Consequence

VPS26C
NM_006052.2 missense

Scores

1
6
10

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.175
Variant links:
Genes affected
VPS26C (HGNC:3044): (VPS26 endosomal protein sorting factor C) The region of chromosome 21 between genes CBR and ERG (CBR-ERG region), which spans 2.5 Mb on 21q22.2, has been defined by analysis of patients with partial trisomy 21. It contributes significantly to the pathogenesis of many characteristics of Down syndrome, including morphological features, hypotonia, and cognitive disability. The DSCR3 (Down syndrome critical region gene 3) gene is found in this region and is predictated to contain eight exons. DSCR3 is expressed in most tissues examined. [provided by RefSeq, Jul 2008]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2
Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
VPS26CNM_006052.2 linkc.498C>A p.Asn166Lys missense_variant Exon 5 of 8 ENST00000309117.11 NP_006043.1 O14972-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
VPS26CENST00000309117.11 linkc.498C>A p.Asn166Lys missense_variant Exon 5 of 8 1 NM_006052.2 ENSP00000311399.6 O14972-1

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD4 exome
Cov.:
31
GnomAD4 genome
Cov.:
33
Bravo
AF:
0.00000378
EpiCase
AF:
0.0000545
EpiControl
AF:
0.00

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not specified Uncertain:1
Aug 12, 2024
Ambry Genetics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The c.498C>A (p.N166K) alteration is located in exon 5 (coding exon 5) of the DSCR3 gene. This alteration results from a C to A substitution at nucleotide position 498, causing the asparagine (N) at amino acid position 166 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.69
BayesDel_addAF
Benign
-0.054
T
BayesDel_noAF
Benign
-0.32
CADD
Benign
0.17
DANN
Benign
0.91
Eigen
Benign
-1.1
Eigen_PC
Benign
-1.4
FATHMM_MKL
Benign
0.38
N
LIST_S2
Uncertain
0.91
D;D;D;D
M_CAP
Benign
0.019
T
MetaRNN
Uncertain
0.73
D;D;D;D
MetaSVM
Uncertain
0.29
D
PrimateAI
Uncertain
0.79
T
PROVEAN
Uncertain
-3.8
D;D;D;D
REVEL
Uncertain
0.39
Sift
Benign
0.14
T;T;T;T
Sift4G
Benign
0.15
T;T;T;T
Polyphen
0.99
.;D;.;.
Vest4
0.90
MutPred
0.56
Gain of sheet (P = 0.0125);.;.;.;
MVP
0.50
MPC
1.0
ClinPred
0.94
D
GERP RS
-10
gMVP
0.67

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
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.

Other links and lift over

dbSNP: rs757477154; hg19: chr21-38604687; API