rs766420907

Variant names:

• chr1-45331503-G-A
• rs766420907
• NM_001048174.2:c.1156C>T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1 PP5_Very_Strong

The NM_001048174.2(MUTYH):​c.1156C>T​(p.Gln386*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000171 in 1,461,794 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000017 (2 hom.)
• Consequence: MUTYH NM_001048174.2 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10
• Conservation: PhyloP100: -0.0640

Genes affected

MUTYH (HGNC:7527): (mutY DNA glycosylase) This gene encodes a DNA glycosylase involved in oxidative DNA damage repair. The enzyme excises adenine bases from the DNA backbone at sites where adenine is inappropriately paired with guanine, cytosine, or 8-oxo-7,8-dihydroguanine, a major oxidatively damaged DNA lesion. The protein is localized to the nucleus and mitochondria. This gene product is thought to play a role in signaling apoptosis by the introduction of single-strand breaks following oxidative damage. Mutations in this gene result in heritable predisposition to colorectal cancer, termed MUTYH-associated polyposis (MAP). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2017]

ENSG00000288208 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 1-45331503-G-A is Pathogenic according to our data. Variant chr1-45331503-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 406824.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-45331503-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUTYH	NM_001048174.2	c.1156C>T	p.Gln386*	stop_gained	Exon 13 of 16	ENST00000456914.7	NP_001041639.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MUTYH	ENST00000456914.7	c.1156C>T	p.Gln386*	stop_gained	Exon 13 of 16	1	NM_001048174.2	ENSP00000407590.2
ENSG00000288208	ENST00000671898.1	n.1744C>T		non_coding_transcript_exon_variant	Exon 17 of 21			ENSP00000499896.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000598 AC: 15 AN: 251006 Hom.: 2 AF XY: 0.0000589 AC XY: 8 AN XY: 135744

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000490

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000171 AC: 25 AN: 1461794 Hom.: 2 Cov.: 32 AF XY: 0.0000206 AC XY: 15 AN XY: 727188

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000243

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000662

GnomAD4 genome Cov.: 33

ExAC AF: 0.0000659 AC: 8

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Familial adenomatous polyposis 2 Pathogenic:7

-

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The MUTYH p.Gln414X variant was not identified in the literature nor was it identified in the dbSNP, NHLBI Exome Sequencing Project (Exome Variant Server), HGMD, COSMIC, MutDB, “Zhejiang Colon Cancer Database”, or ClinVar database. The variant was identified in UMD (5X, but is unvalidated), and in the “InSiGHT Colon Cancer Database”. The p.Gln414X variant leads to a premature stop codon at position 414, which is predicted to lead to a truncated or absent protein and loss of function. Loss of function variants in the MUTYH gene are an established mechanism of disease in MUTYH-associated polyposis. In summary, based on the above information, this variant meets our laboratory’s criteria to be classified as pathogenic. -

Aug 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Gln414*) in the MUTYH gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MUTYH are known to be pathogenic (PMID: 18534194, 20663686). This variant is present in population databases (rs766420907, gnomAD 0.04%), including at least one homozygous and/or hemizygous individual. This premature translational stop signal has been observed in individual(s) with polyposis and colorectal cancer (PMID: 27705013). ClinVar contains an entry for this variant (Variation ID: 406824). For these reasons, this variant has been classified as Pathogenic. -

Oct 16, 2023

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 18, 2023

All of Us Research Program, National Institutes of Health

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant changes 1 nucleotide in exon 13 of the MUTYH gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in a biallelic individual affected with MUTYH-associated polyposis (PMID: 27705013) and an individual affected with advanced cancer (PMID: 28873162). This variant has been identified in 15/251006 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of MUTYH function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -

May 18, 2023

Revvity Omics, Revvity

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 19, 2022

Foundation for Research in Genetics and Endocrinology, FRIGE's Institute of Human Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A heterozygous nonsense variation in exon 13 of the MUTYH gene that results in a stop codon and premature truncation of the protein at codon 386 (p.Gln386Ter) was detected. This variant has not been reported in the 1000 genomes and gnomAD databases. The in silico predictions of the variant are probably damaging by MutationTaster2 tool. The reference codon is conserved across mammals. -

May 04, 2022

Mendelics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Pathogenic:3

Nov 27, 2023

Color Diagnostics, LLC DBA Color Health

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant changes 1 nucleotide in exon 13 of the MUTYH gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in a biallelic individual affected with MUTYH-associated polyposis (PMID: 27705013) and an individual affected with advanced cancer (PMID: 28873162). This variant has been identified in 15/251006 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of MUTYH function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -

Nov 30, 2022

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Q414* pathogenic mutation (also known as c.1240C>T), located in coding exon 13 of the MUTYH gene, results from a C to T substitution at nucleotide position 1240. This changes the amino acid from a glutamine to a stop codon within coding exon 13. This alteration was reported with another MUTYH gene mutation in a woman diagnosed with adenomatous colon polyposis (15-30 polyps) and colon cancer diagnosed at age 63 (Marabelli M et al. Genet Test Mol Biomarkers 2016 12;20:777-785). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Jan 25, 2022

Sema4, Sema4

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.012	T
BayesDel_noAF	Uncertain	0.070
CADD	Pathogenic	30
DANN	Benign	0.97
Eigen	Benign	-0.027
Eigen_PC	Benign	-0.34
FATHMM_MKL	Benign	0.25	N
Vest4		0.80
GERP RS		2.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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: rs766420907; hg19: chr1-45797175;