1-45332767-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM1PM2BP4_Strong

The NM_001048174.2(MUTYH):c.488G>A(p.Arg163Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000551 in 1,614,076 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R163G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000055 ( 0 hom. )

Consequence

MUTYH
NM_001048174.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:12B:1

Conservation

PhyloP100: 0.756

Variant links:

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]

MUTYH links:

ENSG00000288208 (HGNC:):

ENSG00000288208 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 16 uncertain in NM_001048174.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03408125).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUTYH	NM_001048174.2 link	c.488G>A	p.Arg163Gln	missense_variant	Exon 7 of 16	ENST00000456914.7	NP_001041639.1	Q9UIF7-6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MUTYH	ENST00000456914.7 link	c.488G>A	p.Arg163Gln	missense_variant	Exon 7 of 16	1	NM_001048174.2	ENSP00000407590.2		Q9UIF7-6
ENSG00000288208	ENST00000671898.1 link	n.1076G>A		non_coding_transcript_exon_variant	Exon 11 of 21			ENSP00000499896.1		A0A5F9ZGZ0

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000636

AC:

AN:

251474

Hom.:

AF XY:

0.0000662

AC XY:

AN XY:

135918

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00119

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000554

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00149

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000297

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00173

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000158

Hom.:

Bravo

AF:

0.0000567

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:12Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 2

Uncertain:4

Apr 09, 2018

Counsyl

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 08, 2023

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 26, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 191 of the MUTYH protein (p.Arg191Gln). This variant is present in population databases (rs369677603, gnomAD 0.1%). This missense change has been observed in individual(s) with clinical features of MUTYH-related conditions (PMID: 31159747). ClinVar contains an entry for this variant (Variation ID: 127846). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The glutamine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Feb 19, 2024

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome

Uncertain:3Benign:1

Aug 01, 2018

GeneKor MSA

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 19, 2024

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 24, 2022

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Aug 26, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R191Q variant (also known as c.572G>A), located in coding exon 7 of the MUTYH gene, results from a G to A substitution at nucleotide position 572. The arginine at codon 191 is replaced by glutamine, an amino acid with highly similar properties. This alteration has been reported in 1/1197 individuals from Greece, Romania, and Turkey undergoing evaluation for inherited cancer predisposition (Tsaousis GN et al. BMC Cancer, 2019 Jun;19:535). This amino acid position is not well conserved in available vertebrate species, and glutamine is the reference amino acid in other vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

not specified

Uncertain:2

Oct 10, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MUTYH c.572G>A (p.Arg191Gln) results in a conservative amino acid change located in the HhH-GPD domain (IPR003265) of the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 6.4e-05 in 251474 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in MUTYH causing MUTYH-associated Polyposis (6.4e-05 vs 0.0046), allowing no conclusion about variant significance. c.572G>A has been reported in the literature in a cohort of individuals under going genetic testing (exact phenotype of the reported individual was not provided)(Tsaousis_2019). This report does not provide an unequivocal conclusion about association of the variant with MUTYH-associated Polyposis. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Eight ClinVar submissions (evaluation after 2014) cite the variant seven times as uncertain significance and once as likely benign. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:2

Mar 20, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Observed in cases and controls in a breast cancer study and in individuals undergoing multigene panel testing due to unspecified familial cancer (PMID: 33471991, 31159747); This variant is associated with the following publications: (PMID: 35982159, 36243179, 31159747, 33939675, 33471991) -

May 08, 2018

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Neoplasm of stomach;C0206711:Pilomatrixoma;C3272841:Familial adenomatous polyposis 2

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.073

.;.;.;.;.;T;.;.;.;T;.;T

Eigen

Benign

-0.88

Eigen_PC

Benign

-0.71

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.94

.;D;.;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.063

MetaRNN

Benign

0.034

T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.78

MutationAssessor

Benign

-0.87

.;.;.;.;.;N;.;.;.;.;.;.

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.31

N;N;N;N;N;N;N;N;N;N;N;N

REVEL

Benign

0.18

Sift

Benign

0.30

T;T;T;T;T;T;T;T;T;T;T;T

Sift4G

Benign

0.37

T;T;T;T;T;T;T;T;T;T;T;T

Polyphen

0.23, 0.20, 0.23

.;.;.;.;.;B;B;.;B;.;.;.

Vest4

0.35

MVP

0.75

MPC

0.14

ClinPred

0.031

GERP RS

0.22

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.094

gMVP

0.20

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

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