2-47478440-G-C

Variant names:

• chr2-47478440-G-C
• rs767520406
• NM_000251.3:c.2379G>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP6

The NM_000251.3(MSH2):​c.2379G>C​(p.Gln793His) 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 Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q793K) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: MSH2 NM_000251.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 0.885
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• Lynch syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, ClinGen, Orphanet
• Lynch syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• Muir-Torre syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, G2P
• mismatch repair cancer syndrome 1

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• mismatch repair cancer syndrome 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• ovarian cancer

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• malignant pancreatic neoplasm

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• prostate cancer

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• rhabdomyosarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• breast cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 18 benign, 36 uncertain in NM_000251.3
• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 2-47478440-G-C is Benign according to our data. Variant chr2-47478440-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 1019094.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000251.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH2	NM_000251.3	MANE Select	c.2379G>C	p.Gln793His	missense	Exon 14 of 16	NP_000242.1
	MSH2	NM_001406674.1		c.2379G>C	p.Gln793His	missense	Exon 14 of 18	NP_001393603.1
	MSH2	NM_001406631.1		c.2379G>C	p.Gln793His	missense	Exon 14 of 18	NP_001393560.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSH2	ENST00000233146.7	TSL:1 MANE Select	c.2379G>C	p.Gln793His	missense	Exon 14 of 16	ENSP00000233146.2
	MSH2	ENST00000406134.5	TSL:1	c.2379G>C	p.Gln793His	missense	Exon 14 of 16	ENSP00000384199.1
	MSH2	ENST00000918107.1		c.2430G>C	p.Gln810His	missense	Exon 15 of 17	ENSP00000588166.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Hereditary cancer-predisposing syndrome (1)
-	1	-	Hereditary nonpolyposis colorectal neoplasms (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.70	D
Eigen	Benign	-0.064
Eigen_PC	Benign	-0.032
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.015	T
MetaRNN	Uncertain	0.56	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.88	L
PhyloP100		0.89
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-3.0	D
REVEL	Uncertain	0.53
Sift	Uncertain	0.016	D
Sift4G	Uncertain	0.013	D
Polyphen		0.0020	B
Vest4		0.52
MutPred		0.41		Loss of sheet (P = 0.1158)
MVP		0.97
MPC		0.0070
ClinPred		0.78	D
GERP RS		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.51
gMVP		0.78
Mutation Taster		=56/44	polymorphism

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

Other links and lift over

dbSNP: rs767520406; hg19: chr2-47705579;