rs1553350466

Variant names:

• chr2-47409567-TTGGCCAGGACGGTCTCGATCTCCTGACCTCGTGATCCGCCTGCCTTGGCCTCCCAAAGTGTTGGGATTACAGGCGTGAGCCACAGCACTCAGCCAGTTATTTTTTTATAAGAAAACATTTTACTGGCCAGGCCTGGTGGCTCACACCTGTAATCCCAGCACTTTGGGAGGCCGAGGCAGGCGGATCACGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCATCTCTACTAAAAATACAAAAATTAGCCAGGCGTGGTGGTGTGCGCCTGTATTCCCAGCTACTGGGGAGGCTGAAGCAGGAGAATCGATTGAACCCTTGAGGCAGAGGTTGCAGTGAGTTGAGATCGCACCATTGCACTCTAGCCTGGGTGACAGAGCAAGACTTCATCTCAAAAAAAAGAGAAAACATTTTATTAATAAGGTTCATAGAGTTTGGATTTTTCCTTTTTGCTTATAAAATTTTAAAGTATGTTCAAGAGTTTGTTAAATTTTTAAAATTTTATTTTTACTTAGGCTTCTCCTGGCAATCTCTCTCAGTTTGAAGACATTCTCTTTGGTAACAATGATATGTCAGCTTCCATTGGTGTTGTGGGTGTTAAAATGTCCGCAGTTGATGGCCAGAGACAGGTTGGAGTTGGG-T
• rs1553350466
• NM_000251.3:c.367-525_493del

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Moderate PM2 PP5_Moderate

The ENST00000233146.7(MSH2):​c.367-526_492del​(p.Ala123_Tyr165del) variant causes a splice acceptor, conservative inframe deletion, splice region, intron 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 Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. A123A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 26)
• Consequence: MSH2 ENST00000233146.7 splice_acceptor, conservative_inframe_deletion, splice_region, intron
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.223

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.09946524 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-47409567-TTGGCCAGGACGGTCTCGATCTCCTGACCTCGTGATCCGCCTGCCTTGGCCTCCCAAAGTGTTGGGATTACAGGCGTGAGCCACAGCACTCAGCCAGTTATTTTTTTATAAGAAAACATTTTACTGGCCAGGCCTGGTGGCTCACACCTGTAATCCCAGCACTTTGGGAGGCCGAGGCAGGCGGATCACGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCATCTCTACTAAAAATACAAAAATTAGCCAGGCGTGGTGGTGTGCGCCTGTATTCCCAGCTACTGGGGAGGCTGAAGCAGGAGAATCGATTGAACCCTTGAGGCAGAGGTTGCAGTGAGTTGAGATCGCACCATTGCACTCTAGCCTGGGTGACAGAGCAAGACTTCATCTCAAAAAAAAGAGAAAACATTTTATTAATAAGGTTCATAGAGTTTGGATTTTTCCTTTTTGCTTATAAAATTTTAAAGTATGTTCAAGAGTTTGTTAAATTTTTAAAATTTTATTTTTACTTAGGCTTCTCCTGGCAATCTCTCTCAGTTTGAAGACATTCTCTTTGGTAACAATGATATGTCAGCTTCCATTGGTGTTGTGGGTGTTAAAATGTCCGCAGTTGATGGCCAGAGACAGGTTGGAGTTGGG-T is Pathogenic according to our data. Variant chr2-47409567-TTGGCCAGGACGGTCTCGATCTCCTGACCTCGTGATCCGCCTGCCTTGGCCTCCCAAAGTGTTGGGATTACAGGCGTGAGCCACAGCACTCAGCCAGTTATTTTTTTATAAGAAAACATTTTACTGGCCAGGCCTGGTGGCTCACACCTGTAATCCCAGCACTTTGGGAGGCCGAGGCAGGCGGATCACGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCATCTCTACTAAAAATACAAAAATTAGCCAGGCGTGGTGGTGTGCGCCTGTATTCCCAGCTACTGGGGAGGCTGAAGCAGGAGAATCGATTGAACCCTTGAGGCAGAGGTTGCAGTGAGTTGAGATCGCACCATTGCACTCTAGCCTGGGTGACAGAGCAAGACTTCATCTCAAAAAAAAGAGAAAACATTTTATTAATAAGGTTCATAGAGTTTGGATTTTTCCTTTTTGCTTATAAAATTTTAAAGTATGTTCAAGAGTTTGTTAAATTTTTAAAATTTTATTTTTACTTAGGCTTCTCCTGGCAATCTCTCTCAGTTTGAAGACATTCTCTTTGGTAACAATGATATGTCAGCTTCCATTGGTGTTGTGGGTGTTAAAATGTCCGCAGTTGATGGCCAGAGACAGGTTGGAGTTGGG-T is described in ClinVar as [Pathogenic]. Clinvar id is 525792.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSH2	NM_000251.3	c.367-525_493del	p.Ala123fs	frameshift_variant, splice_acceptor_variant, splice_region_variant, intron_variant	Exon 3 of 16	ENST00000233146.7	NP_000242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7	c.367-526_492del	p.Ala123_Tyr165del	splice_acceptor_variant, conservative_inframe_deletion, splice_region_variant, intron_variant	Exon 3 of 16	1	NM_000251.3	ENSP00000233146.2

Frequencies

GnomAD3 genomes Cov.: 26

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 26

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary nonpolyposis colorectal neoplasms Pathogenic:1

Sep 08, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is a gross deletion of the genomic region encompassing part of exon 3 of the MSH2 gene, including the  intron 2-exon 3 boundary (c.367-525_493del). This likely creates a premature translational stop signal and is expected to result in an absent or disrupted protein product. This variant has not been reported in the literature in individuals with MSH2-related disease. Loss-of-function variants in MSH2 are known to be pathogenic (PMID: 15849733, 24362816). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1553350466; hg19: chr2-47636706;