1-45329334-G-A

Position:

chr1-45329334-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001048174.2(MUTYH):c.1538C>T(p.Ala513Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,614,080 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

MUTYH
NM_001048174.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: -0.696

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.08442831).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MUTYH	NM_001128425.2 linkuse as main transcript	c.1622C>T	p.Ala541Val	missense_variant	16/16	ENST00000710952.2	NP_001121897.1
MUTYH	NM_001048174.2 linkuse as main transcript	c.1538C>T	p.Ala513Val	missense_variant	16/16	ENST00000456914.7	NP_001041639.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MUTYH	ENST00000710952.2 linkuse as main transcript	c.1622C>T	p.Ala541Val	missense_variant	16/16		NM_001128425.2	ENSP00000518552
MUTYH	ENST00000456914.7 linkuse as main transcript	c.1538C>T	p.Ala513Val	missense_variant	16/16	1	NM_001048174.2	ENSP00000407590	A1	Q9UIF7-6

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

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:

0.00000398

AC:

AN:

251496

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135922

show subpopulations

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000164

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727238

show subpopulations

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

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:

0.0000474

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Apr 26, 2023	This missense variant replaces alanine with valine at codon 541 of the MUTYH protein. This variant is also known as c.1580C>T (p.Ala527Val) based on an alternative transcript (NM_001048171). Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been performed for this variant. This variant has been detected in a breast cancer case-control meta-analysis in 2/60466 cases and 2/53461 controls (PMID: 33471991). This variant has been identified in 1/251496 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Mar 20, 2023	The p.A541V variant (also known as c.1622C>T), located in coding exon 16 of the MUTYH gene, results from a C to T substitution at nucleotide position 1622. The alanine at codon 541 is replaced by valine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	May 04, 2021	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 13, 2021	Not observed at significant frequency in large population cohorts (Lek 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 27103403) -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Oct 21, 2016	Variant summary: The c.1622C>T (p.Ala541Val) in MUTYH gene is a missense change that involves a non-conserved nucleotide and 3/5 in silico tools predict benign outcome. The variant of interest is located outside of any known functional domain, although the functional impact of this missense change is yet to be studied. The variant is present in the large control population dataset of ExAC at a frequency 0.000008 (1/121410 chrs tested), which does not exceed the maximal expected frequency of a pathogenic allele (0.0056) in this gene. The variant has not been reported, to our knowledge, in affected individuals via published reports. In addition, it was cited as VUS by a reputable database/clinical laboratory. Taken together, the variant has been classified as a "Variant of Uncertain Significance (VUS)," until additional information becomes available. -

Familial adenomatous polyposis 2

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 25, 2024	This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 541 of the MUTYH protein (p.Ala541Val). This variant is present in population databases (rs751053826, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with MUTYH-related conditions. ClinVar contains an entry for this variant (Variation ID: 185177). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The valine 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Nov 02, 2023	This missense variant replaces alanine with valine at codon 541 of the MUTYH protein. This variant is also known as c.1580C>T (p.Ala527Val) based on an alternative transcript (NM_001048171). Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has been identified in 1/251496 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.41

CADD

Benign

1.1

DANN

Benign

0.94

DEOGEN2

Benign

0.055

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

Eigen

Benign

-0.82

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.027

LIST_S2

Benign

0.73

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

M_CAP

Benign

0.010

MetaRNN

Benign

0.084

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

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.5

.;.;.;.;.;.;L;.;.;.;.;.

MutationTaster

Benign

1.0

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

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.74

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

REVEL

Benign

0.11

Sift

Uncertain

0.0060

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

Sift4G

Uncertain

0.029

D;T;T;T;T;T;T;T;T;D;T;T

Polyphen

0.0010

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

Vest4

0.080

MutPred

0.16

.;.;.;.;.;.;.;.;.;.;Gain of relative solvent accessibility (P = 0.09);.;

MVP

0.72

MPC

0.11

ClinPred

0.26

GERP RS

-1.6

Varity_R

0.11

gMVP

0.28

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