NM_001128425.2:c.1636_1637delAGinsTT

Variant names:

• chr1-45329319-CT-AA
• NM_001128425.2:c.1636_1637delAGinsTT
• MUTYH p.Ser546Phe

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+2 Uncertain · Warm

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 2 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_Moderate

The NM_001128425.2(MUTYH):c.1636_1637delAGinsTT (p.Ser546Phe) variant causes a missense change. The gene MUTYH is a cancer driver gene (CancerMine: 2 driver citations). Note: allele frequency estimates from gnomAD may be inaccurate for this variant type (MNP or indel longer than 3 bp) due to technology limitations. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.S546?: Uncertain_significance (ClinVar VariationId 967459, 2 stars); p.S546C: Uncertain_significance (ClinVar VariationId 4113479, 1 star); p.S546G: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 480010); p.S546I: Uncertain_significance (ClinVar VariationId 4113480, 1 star); p.S546N: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 1376959); p.S546R: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 533307); p.S546R: Uncertain_significance (ClinVar VariationId 4113481, 1 star); p.S546R: Uncertain_significance (ClinVar VariationId 4113478, 1 star); p.S546= (synonymous): Likely_benign (ClinVar VariationId 926388, 2 stars); p.S546T: Uncertain_significance (ClinVar VariationId 1499354, 2 stars)

• Frequency: Genomes: not found (cov: 31)
• Consequence: MUTYH NM_001128425.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.591
• 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: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
• colorectal cancer

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

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

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

ENSG00000288208 (HGNC:):

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 2 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	MUTYH NM_001128425.2	MANE Plus Clinical	c.1636_1637delAGinsTT p.Ser546Phe	missense	N/A	Prot: NP_001121897.1 UniProt:
	MUTYH NM_001048174.2	MANE Select	c.1552_1553delAGinsTT p.Ser518Phe	missense	N/A	Prot: NP_001041639.1 UniProt:
	MUTYH NM_012222.3		c.1627_1628delAGinsTT p.Ser543Phe	missense	N/A	Prot: NP_036354.1 UniProt:

MUTYH NM_001128425.2

MANE Plus Clinical

HGVSc / HGVSpc.1636_1637delAGinsTTp.Ser546Phe

Exon rankN/A

missense

Prot: NP_001121897.1UniProt: E5KP25

MUTYH NM_001048174.2

MANE Select

HGVSc / HGVSpc.1552_1553delAGinsTTp.Ser518Phe

Exon rankN/A

missense

Prot: NP_001041639.1UniProt: Q9UIF7-6

MUTYH NM_012222.3

HGVSc / HGVSpc.1627_1628delAGinsTTp.Ser543Phe

Exon rankN/A

missense

Prot: NP_036354.1UniProt: Q9UIF7-1E5KP26

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	MUTYH ENST00000710952.2	MANE Plus Clinical	c.1636_1637delAGinsTT p.Ser546Phe	missense	N/A	Prot: ENSP00000518552.2 UniProt:
	MUTYH ENST00000456914.7	TSL:1MANE Select	c.1552_1553delAGinsTT p.Ser518Phe	missense	N/A	Prot: ENSP00000407590.2 UniProt:
	MUTYH ENST00000372098.7	TSL:1	c.1627_1628delAGinsTT p.Ser543Phe	missense	N/A	Prot: ENSP00000361170.3 UniProt:

MUTYH ENST00000710952.2

MANE Plus Clinical

HGVSc / HGVSpc.1636_1637delAGinsTTp.Ser546Phe

Exon rankN/A

missense

Prot: ENSP00000518552.2UniProt: E5KP25

MUTYH ENST00000456914.7

TSL:1MANE Select

HGVSc / HGVSpc.1552_1553delAGinsTTp.Ser518Phe

Exon rankN/A

missense

Prot: ENSP00000407590.2UniProt: Q9UIF7-6

MUTYH ENST00000372098.7

TSL:1

HGVSc / HGVSpc.1627_1628delAGinsTTp.Ser543Phe

Exon rankN/A

missense

Prot: ENSP00000361170.3UniProt: Q9UIF7-1

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 2 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:31
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:31

Showing 2 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
PhyloP100	Benign	0.59

Showing 1 of 1 scores

Splicing Scores

No splicing scores have been computed for this variant.

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

hg19: chr1-45794991;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar