2-47410300-C-T

Position:

• chr2-47410300-C-T

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BA1

The NM_000251.3(MSH2):​c.573C>T​(p.Leu191Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00343 in 1,614,056 control chromosomes in the GnomAD database, including 180 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency:
  • Genomes: 𝑓 0.018 (88 hom., cov: 31)
  • Exomes 𝑓: 0.0019 (92 hom.)
• Consequence: MSH2 NM_000251.3 synonymous
• Clinical Significance: Benign reviewed by expert panel B:23
• Conservation: PhyloP100: 1.27

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 Benign. Variant got -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.39).
• BP6: Variant 2-47410300-C-T is Benign according to our data. Variant chr2-47410300-C-T is described in ClinVar as [Benign]. Clinvar id is 91140.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr2-47410300-C-T is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=1.27 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0618 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3	c.573C>T	p.Leu191Leu	synonymous_variant	3/16	ENST00000233146.7	NP_000242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7	c.573C>T	p.Leu191Leu	synonymous_variant	3/16	1	NM_000251.3	ENSP00000233146.2

Frequencies

GnomAD3 genomes AF: 0.0181 AC: 2757 AN: 152062 Hom.: 87 Cov.: 31

Gnomad AFR AF: 0.0639

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00550

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.0100

GnomAD3 exomes AF: 0.00475 AC: 1195 AN: 251458 Hom.: 35 AF XY: 0.00353 AC XY: 480 AN XY: 135912

Gnomad AFR exome AF: 0.0667

Gnomad AMR exome AF: 0.00246

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000131

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000106

Gnomad OTH exome AF: 0.00163

GnomAD4 exome AF: 0.00190 AC: 2783 AN: 1461876 Hom.: 92 Cov.: 32 AF XY: 0.00161 AC XY: 1171 AN XY: 727244

Gnomad4 AFR exome AF: 0.0712

Gnomad4 AMR exome AF: 0.00255

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.000185

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000252

Gnomad4 OTH exome AF: 0.00391

GnomAD4 genome AF: 0.0181 AC: 2761 AN: 152180 Hom.: 88 Cov.: 31 AF XY: 0.0177 AC XY: 1316 AN XY: 74398

Gnomad4 AFR AF: 0.0638

Gnomad4 AMR AF: 0.00550

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00993

Alfa AF: 0.00628 Hom.: 7

Bravo AF: 0.0205

Asia WGS AF: 0.00346 AC: 13 AN: 3478

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:23

Revision: reviewed by expert panel

Submissions by phenotype

not specified Benign:9

Benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The MSH2 p.Leu191= variant was identified in the following databases: dbSNP (ID: rs1800151) “With Benign allele”, ClinVar (classified benign, reviewed by an expert panel (2013); submitters benign by InSIGHT, Ambry Genetics, Prevention Genetics, Invitae, Quest Diagnostics Nichols Institute San Juan Capistrano, ARUP, and Mayo Clinic, and likely benign by Illumina), Clinvitae (3x), Cosmic (in numerous primary tissue type tumours), UMD-LSDB (7x as neutral, co-occurring with pathogenic variants MSH2 c.1_211del (p.Met1?) and MSH6 c.2150_2153delTCAG (p.Val717AlafsX18)), Insight Colon Cancer Gene Variant Database (3x class 1), Mismatch Repair Genes Variant Database (2x), Insight Hereditary Tumors Database (4x), and in control databases in 1690 (48 homozygous) of 277178 chromosomes at a frequency of 0.006 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). Breakdown of the observations by population include African in 1576 of 24014 chromosomes (freq: 0.07), Other in 12 of 6462 chromosomes (freq: 0.002), Latino in 86 of 34420 chromosomes (freq: 0.002), European Non-Finnish in 12 of 126694 chromosomes (freq: 0.0001), and South Asian in 4 of 30782 chromosomes (freq: 0.0001), while not observed in the Ashkenazi Jewish, East Asian, and European Finnish populations. The variant was not identified in GeneInSight-COGR, MutDB, OR Zhejiang Colon Cancer Database. The p.Leu191= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign. -
Benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Mar 31, 2021	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, no assertion criteria provided	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute	-	- -

Lynch syndrome 1 Benign:4

Benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 23, 2018	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	Apr 06, 2016	- -

Hereditary cancer-predisposing syndrome Benign:4

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Nov 18, 2014	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Benign, criteria provided, single submitter	clinical testing	Institute for Biomarker Research, Medical Diagnostic Laboratories, L.L.C.	Jan 24, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 13, 2015	- -
Benign, criteria provided, single submitter	curation	Sema4, Sema4	Oct 21, 2020	- -

not provided Benign:3

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 21, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -

Breast and/or ovarian cancer Benign:1

Benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Jul 12, 2022

- -

Lynch syndrome Benign:1

Benign, reviewed by expert panel

research

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Sep 05, 2013

MAF >1% -

Hereditary nonpolyposis colorectal neoplasms Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 01, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.39
CADD	Benign	8.9
DANN	Benign	0.58

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1800151; hg19: chr2-47637439; COSMIC: COSV51876542;