rs17218356

Positions:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000251.3(MSH2):c.1662-9G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00108 in 1,341,742 control chromosomes in the GnomAD database, including 11 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

Frequency

Genomes: 𝑓 0.0046 ( 3 hom., cov: 32)

Exomes 𝑓: 0.00063 ( 8 hom. )

Consequence

MSH2
NM_000251.3 intron

Scores

Splicing: ADA: 0.00006028

Clinical Significance

Benign reviewed by expert panel U:2B:16

Conservation

PhyloP100: 0.975

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 2-47470956-G-A is Benign according to our data. Variant chr2-47470956-G-A is described in ClinVar as [Benign]. Clinvar id is 90730.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr2-47470956-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0046 (700/152108) while in subpopulation AFR AF= 0.0145 (603/41488). AF 95% confidence interval is 0.0136. There are 3 homozygotes in gnomad4. There are 326 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3 linkuse as main transcript	c.1662-9G>A		intron_variant		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.1662-9G>A		intron_variant		1	NM_000251.3	ENSP00000233146.2		P43246-1

Frequencies

GnomAD3 genomes

AF:

0.00461

AC:

700

AN:

151990

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0146

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00406

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00958

GnomAD3 exomes

AF:

0.00133

AC:

332

AN:

249892

Hom.:

AF XY:

0.00110

AC XY:

149

AN XY:

135284

show subpopulations

Gnomad AFR exome

AF:

0.0161

Gnomad AMR exome

AF:

0.00122

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.0000986

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000177

Gnomad OTH exome

AF:

0.00148

GnomAD4 exome

AF:

0.000634

AC:

754

AN:

1189634

Hom.:

Cov.:

AF XY:

0.000580

AC XY:

351

AN XY:

605536

show subpopulations

Gnomad4 AFR exome

AF:

0.0168

Gnomad4 AMR exome

AF:

0.00163

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000523

Gnomad4 SAS exome

AF:

0.0000873

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000125

Gnomad4 OTH exome

AF:

0.00158

GnomAD4 genome

AF:

0.00460

AC:

700

AN:

152108

Hom.:

Cov.:

AF XY:

0.00438

AC XY:

326

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0145

Gnomad4 AMR

AF:

0.00406

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00948

Alfa

AF:

0.00134

Hom.:

Bravo

AF:

0.00544

Asia WGS

AF:

0.00145

AC:

AN:

3474

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Benign

Submissions summary: Uncertain:2Benign:16

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:5

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Jan 17, 2017	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, no assertion criteria provided	research	Mayo Clinic Laboratories, Mayo Clinic	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Nov 28, 2018	- -

Lynch syndrome 1

Uncertain:1Benign:3

Uncertain significance, criteria provided, single submitter	clinical testing	Center for Human Genetics, Inc, Center for Human Genetics, Inc	Nov 01, 2016	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	Sep 07, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -

not provided

Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -

Hereditary cancer-predisposing syndrome

Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Feb 18, 2015	- -
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. -

Breast and/or ovarian cancer

Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Nov 09, 2021

- -

Carcinoma of colon

Benign:1

Benign, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

The MSH2 c.1662-9G>A variant was identified in 3 of 584 proband chromosomes (frequency: 0.005) from individuals or families with colorectal cancer (Montera 2000, Farrington 1998, Thompson 2013). The variant was also identified in dbSNP (ID: rs17218356) as â€šÃ„ÃºWith other alleleâ€šÃ„Ã¹, ClinVar (classified as benign by an InSiGHT expert panel (2013) and five other submitters; as likely benign by 2 submitters; and as uncertain significance by 2 submitters). The variant was not identified in UMD-LSDB. The variant was also identified in control databases in 465 (4 homozygous) of 276212 chromosomes at a frequency of 0.002, increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 386 (4 homozygous) of 23980 chromosomes (freq: 0.02), Other in 14 of 6450 chromosomes (freq: 0.002), Latino in 38 of 34372 chromosomes (freq: 0.001), European Non-Finnish in 22 of 126108 chromosomes (freq: 0.0002), East Asian in 2 of 18846 chromosomes (freq: 0.0001), and South Asian in 3 of 30556 chromosomes (freq: 0.0001), while it was not observed in the Ashkenazi Jewish or European Finnish populations. The c.1662-9G>A variant is located in the 3' splice region but does not affect the invariant -1 and -2 positions, although positions -3 and -5 to -12 are part of the splicing consensus sequence and variants involving these positions sometimes affect splicing. However, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. Furthermore, in vitro splicing analysis performed by Thompson (2013) determined the splicing of this allele to be similar to wild type. In summary, based on the above information, this variant meets our laboratory's criteria to be classified as benign. -

Lynch syndrome

Benign:1

Benign, reviewed by expert panel

research

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Sep 05, 2013

Multifactorial likelihood analysis posterior probability <0.001 -

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

-0.54

CADD

Benign

DANN

Benign

0.59

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000060

dbscSNV1_RF

Benign

0.010

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