1-45331240-G-A

Variant names:

• chr1-45331240-G-A
• rs200844166
• NM_001128425.2:c.1418C>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4 BP6_Moderate

The NM_001128425.2(MUTYH):​c.1418C>T​(p.Ala473Val) 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. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A473T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MUTYH NM_001128425.2 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 2.56
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• familial adenomatous polyposis 2

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, G2P
• colorectal cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• familial ovarian cancer

  Inheritance: AD, AR Classification: NO_KNOWN Submitted by: ClinGen
• hereditary breast carcinoma

  Inheritance: AD, AR Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000288208 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3375836).
• BP6: Variant 1-45331240-G-A is Benign according to our data. Variant chr1-45331240-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 1772176.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001128425.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MUTYH	NM_001128425.2	MANE Plus Clinical	c.1418C>T	p.Ala473Val	missense	Exon 14 of 16	NP_001121897.1
	MUTYH	NM_001048174.2	MANE Select	c.1334C>T	p.Ala445Val	missense	Exon 14 of 16	NP_001041639.1
	MUTYH	NM_012222.3		c.1409C>T	p.Ala470Val	missense	Exon 14 of 16	NP_036354.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MUTYH	ENST00000710952.2	MANE Plus Clinical	c.1418C>T	p.Ala473Val	missense	Exon 14 of 16	ENSP00000518552.2
	MUTYH	ENST00000456914.7	TSL:1 MANE Select	c.1334C>T	p.Ala445Val	missense	Exon 14 of 16	ENSP00000407590.2
	MUTYH	ENST00000372098.7	TSL:1	c.1409C>T	p.Ala470Val	missense	Exon 14 of 16	ENSP00000361170.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Benign:1

Sep 09, 2025

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Benign	18
DANN	Benign	0.96
DEOGEN2	Benign	0.23	T
Eigen	Benign	0.036
Eigen_PC	Benign	0.018
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.042	D
MetaRNN	Benign	0.34	T
MetaSVM	Benign	-0.55	T
MutationAssessor	Uncertain	2.6	M
PhyloP100		2.6
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-1.2	N
REVEL	Uncertain	0.54
Sift	Benign	0.066	T
Sift4G	Benign	0.062	T
Polyphen		0.18	B
Vest4		0.26
MutPred		0.57		Gain of sheet (P = 0.0827)
MVP		0.94
MPC		0.13
ClinPred		0.32	T
GERP RS		5.2
Varity_R		0.13
gMVP		0.33
Mutation Taster		=22/78	disease causing

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

Other links and lift over

dbSNP: rs200844166; hg19: chr1-45796912;