rs587779095

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PM5PP3

The NM_000251.3(MSH2):c.1508T>A(p.Leu503His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,618 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L503P) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MSH2
NM_000251.3 missense, splice_region

Scores

Splicing: ADA: 0.02450

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 7.52

Variant links:

Genes affected

MSH2 (HGNC:7325): (mutS homolog 2) This locus is frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). When cloned, it was discovered to be a human homolog of the E. coli mismatch repair gene mutS, consistent with the characteristic alterations in microsatellite sequences (RER+ phenotype) found in HNPCC. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

MSH2 links:

MSH2 (HGNC:):

MSH2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr2-47463152-T-C is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.821

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3 linkuse as main transcript	c.1508T>A	p.Leu503His	missense_variant, splice_region_variant	9/16	ENST00000233146.7	NP_000242.1	P43246-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7 linkuse as main transcript	c.1508T>A	p.Leu503His	missense_variant, splice_region_variant	9/16	1	NM_000251.3	ENSP00000233146.2		P43246-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251176

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135822

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461618

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727132

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 22, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 07, 2024	The c.1508T>A (p.L503H) alteration is located in exon 9 (coding exon 9) of the MSH2 gene. This alteration results from a T to A substitution at nucleotide position 1508, causing the leucine (L) at amino acid position 503 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hereditary nonpolyposis colorectal neoplasms

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 09, 2022

This sequence change replaces leucine, which is neutral and non-polar, with histidine, which is basic and polar, at codon 503 of the MSH2 protein (p.Leu503His). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with MSH2-related conditions. ClinVar contains an entry for this variant (Variation ID: 918541). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.97

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.84

D;.;.;.

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D;D;D

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.82

D;D;D;D

MetaSVM

Pathogenic

0.93

MutationAssessor

Pathogenic

3.3

M;.;.;.

PrimateAI

Uncertain

0.51

PROVEAN

Pathogenic

-6.8

D;D;.;D

REVEL

Pathogenic

0.75

Sift

Uncertain

0.0050

D;D;.;D

Sift4G

Pathogenic

0.0

D;D;.;D

Polyphen

1.0

D;.;.;D

Vest4

0.92

MutPred

0.60

Loss of stability (P = 0.0366);.;Loss of stability (P = 0.0366);Loss of stability (P = 0.0366);

MVP

0.96

MPC

0.032

ClinPred

0.98

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.84

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.025

dbscSNV1_RF

Benign

0.32

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.

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