chr1-45329410-G-C

Position:

• chr1-45329410-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001048174.2(MUTYH):​c.1462C>G​(p.Pro488Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. 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. P488Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: MUTYH NM_001048174.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.618

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]

ACMG classification

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=0.17868572).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MUTYH	NM_001128425.2	c.1546C>G	p.Pro516Ala	missense_variant	16/16	ENST00000710952.2	NP_001121897.1
MUTYH	NM_001048174.2	c.1462C>G	p.Pro488Ala	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	c.1546C>G	p.Pro516Ala	missense_variant	16/16		NM_001128425.2	ENSP00000518552
MUTYH	ENST00000456914.7	c.1462C>G	p.Pro488Ala	missense_variant	16/16	1	NM_001048174.2	ENSP00000407590	A1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial adenomatous polyposis 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 30, 2022

This variant has not been reported in the literature in individuals affected with MUTYH-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces proline, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 516 of the MUTYH protein (p.Pro516Ala). ClinVar contains an entry for this variant (Variation ID: 1440281). 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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.068	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	10
DANN	Benign	0.95
DEOGEN2	Benign	0.093	.;.;.;.;.;.;T;.;.;.;.;T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.45
FATHMM_MKL	Benign	0.063	N
LIST_S2	Uncertain	0.88	.;.;D;.;D;D;D;D;D;D;D;D
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.18	T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.87	T
MutationAssessor	Uncertain	2.5	.;.;.;.;.;.;M;.;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-1.2	N;N;N;N;N;N;N;N;N;N;N;.
REVEL	Benign	0.068
Sift	Benign	0.19	T;T;T;T;T;T;T;T;T;T;T;.
Sift4G	Benign	0.42	T;T;T;T;T;T;T;T;T;T;T;T
Polyphen		0.014, 0.18, 0.031	.;.;.;.;.;.;B;B;.;.;B;.
Vest4		0.15
MutPred		0.36		.;.;.;.;.;.;.;.;.;.;Loss of catalytic residue at P516 (P = 0.0066);.;
MVP		0.82
MPC		0.11
ClinPred		0.28	T
GERP RS		1.4
Varity_R		0.020
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-45795082;