rs151244108

Positions:

• chr2-47429890-C-A
• chr2-47429890-C-G
• chr2-47429890-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000251.3(MSH2):​c.1225C>A​(p.Gln409Lys) variant causes a missense change. 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 Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MSH2 NM_000251.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.14

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.922

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3	c.1225C>A	p.Gln409Lys	missense_variant	7/16	ENST00000233146.7	NP_000242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7	c.1225C>A	p.Gln409Lys	missense_variant	7/16	1	NM_000251.3	ENSP00000233146.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Nov 27, 2015

Variant summary: c.1225C>A affects a conserved nucleotide, resulting in amino acid change from Gln to Lys. 2/4 in-silico tools predict this variant to be benign (SNPs&GO not captured due to low reliability index). 4/5 programs in Alamut predict that this variant does not have majoy effect on normal splicing. ESE finder predicts that this variant may affect ESE site of SRp40. However, these predictions are not confirmed by experimental studies. This variant was found in 1/56728 control chromosomes at a frequency of 0.0000176, which does not significantly exceed maximal expected frequency of a pathogenic allele (0.0005683). In addition, one reputable database classified this variant as VUS. Because of the absence of co-segregation evidence and the lack of functional studies, the variant was classified as a variant of uncertain significance (VUS) until additional information becomes available. -

Hereditary nonpolyposis colorectal neoplasms Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 06, 2022

This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with colorectal cancer (PMID: 18257912). ClinVar contains an entry for this variant (Variation ID: 90576). Advanced modeling of experimental studies (such as gene expression, population dynamics, functional pathways, and cell-cycle effects in cell culture) performed at Invitae indicates that this missense variant is not expected to disrupt MSH2 protein function. 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. This sequence change replaces glutamine, which is neutral and polar, with lysine, which is basic and polar, at codon 409 of the MSH2 protein (p.Gln409Lys). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.48
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.78	D;.;.;.
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.93	D;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.92	D;D;D;D
MetaSVM	Uncertain	0.52	D
MutationAssessor	Uncertain	2.7	M;.;.;.
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.4	D;D;.;D
REVEL	Pathogenic	0.79
Sift	Uncertain	0.0060	D;D;.;D
Sift4G	Uncertain	0.057	T;T;.;T
Polyphen		0.0070	B;.;.;B
Vest4		0.81
MutPred		0.81		Gain of ubiquitination at Q409 (P = 0.0311);.;Gain of ubiquitination at Q409 (P = 0.0311);Gain of ubiquitination at Q409 (P = 0.0311);
MVP		0.99
MPC		0.0065
ClinPred		0.89	D
GERP RS		5.5
Varity_R		0.88
gMVP		0.68

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

Other links and lift over

dbSNP: rs151244108; hg19: chr2-47657029;