1-45330557-C-T

Position:

chr1-45330557-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PM5BP4

The NM_001048174.2(MUTYH):c.1393G>A(p.Val465Ile) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V465F) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

MUTYH
NM_001048174.2 missense, splice_region

Scores

Splicing: ADA: 0.7354

Clinical Significance

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

Conservation

PhyloP100: 3.53

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 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-45330557-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 219953.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.37914318).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MUTYH	NM_001048174.2 linkuse as main transcript	c.1393G>A	p.Val465Ile	missense_variant, splice_region_variant	15/16	ENST00000456914.7	NP_001041639.1	Q9UIF7-6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MUTYH	ENST00000456914.7 linkuse as main transcript	c.1393G>A	p.Val465Ile	missense_variant, splice_region_variant	15/16	1	NM_001048174.2	ENSP00000407590.2		Q9UIF7-6
ENSG00000288208	ENST00000671898.1 linkuse as main transcript	n.1981G>A		splice_region_variant, non_coding_transcript_exon_variant	19/21			ENSP00000499896.1		A0A5F9ZGZ0

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000417

AC:

AN:

239690

Hom.:

AF XY:

0.00000773

AC XY:

AN XY:

129386

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:

0.00000929

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1455980

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723684

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:

9.02e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Jul 11, 2024	The MUTYH c.1477G>A (p.Val493Ile) variant has not been reported in individuals with MUTYH-related conditions in the published literature. The frequency of this variant in the general population, 0.0000042 (1/239690 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 27, 2018	This variant is denoted MUTYH c.1477G>A at the cDNA level, p.Val493Ile (V493I) at the protein level, and results in the change of a Valine to an Isoleucine (GTT>ATT). This variant has not, to our knowledge, been published in the literature as a pathogenic or benign germline variant. MUTYH Val493Ile was not observed in large population cohorts (Lek 2016). This variant is located in the NUDIX domain (Ruggieri 2013). In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function. Based on currently available evidence, it is unclear whether MUTYH Val493Ile is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. Of note, MUTYH-Associated Polyposis (MAP) is a recessive condition associated with two MUTYH pathogenic variants on opposite chromosomes. -

Familial adenomatous polyposis 2

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 11, 2023	This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 493 of the MUTYH protein (p.Val493Ile). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 142092). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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	Jun 26, 2023	- -

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 29, 2024	The p.V493I variant (also known as c.1477G>A), located in coding exon 15 of the MUTYH gene, results from a G to A substitution at nucleotide position c.1477. This variant impacts the first base pair of coding exon 15. The valine at codon 493 is replaced by isoleucine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 28, 2019	- -

Gastric cancer;C3272841:Familial adenomatous polyposis 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

May 08, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.050

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.20

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

Eigen

Benign

-0.050

Eigen_PC

Benign

0.10

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.79

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

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.38

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

MetaSVM

Uncertain

0.35

MutationAssessor

Uncertain

2.1

.;.;.;.;.;.;M;.;.;.;.;.

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-0.51

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

REVEL

Uncertain

0.42

Sift

Benign

0.15

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

Sift4G

Benign

0.097

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

Polyphen

0.0030, 0.0010, 0.0

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

Vest4

0.37

MutPred

0.59

.;.;.;.;.;.;.;.;.;.;Loss of disorder (P = 0.0952);.;

MVP

0.88

MPC

0.11

ClinPred

0.40

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.9

Varity_R

0.085

gMVP

0.18

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.74

dbscSNV1_RF

Benign

0.61

SpliceAI score (max)

0.080

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