About MUTYH
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. This variant is uncertain. Select a step to read what it means.
Uncertain.The recorded classification is uncertain significance.
Gene-level background from the recorded interpretation.
Words with a dotted underline have a short definition. Hover or tap them.No gene-level summary was recorded for this case.
The recorded framework is ClinGen MUTYH VCEP v1.0.0. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.
The applied criteria and their strengths are shown as assessed under the stated framework.
NM_001048171.1:c.995C>T is present at very low frequency in population databases. gnomAD v2.1 reports 14 heterozygotes among 273,222 alleles (AF=0.00512%, 0 homozygotes); gnomAD v4.1 reports 56 heterozygotes among 1,609,824 alleles (AF=0.00348%, 0 homozygotes). Both allele frequencies are below the 0.1% PM2 threshold. The variant is absent from gnomAD-Canada.
Multiple lines of computational evidence suggest that this missense variant has no impact on gene product function. The REVEL score is 0.116 (below 0.5), BayesDel score is -0.476 (predicting benign), and SpliceAI predicts no splicing alteration (max delta = 0.00). All three in silico tools concordantly predict a benign effect.
InSiGHT Hereditary Colorectal Cancer/Polyposis Specification v1.0.0 lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: PM2 supporting, BP4 supporting benign; combination = 1 supporting + 1 supporting benign, which maps to VUS.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 56 / 1,609,824 alleles. Recorded AF 3.47864e-05. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 5.12404e-05; MAF= 0.00512%, 14/273222 alleles, homozygotes = 0) and has highest observed frequency in the South Asian population (AF= 0.000365764; MAF= 0.03658%, 11/30074 alleles, homozygotes = 0); grpmax FAF= 0.00020417.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
7 Uncertain significance · 1 Likely benign · 1 Uncertain Significance.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MUTYH, a DNA glycosylase, is frequently mutated in colorectal cancer.
This variant has not previously been reported in somatic cancers (COSMIC).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen MUTYH VCEP v1.0.0, with the data and sources behind each one.
29 criteria with recorded statuses: 2 met · 17 not met · 4 not assessed · 6 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_001048171.1:c.995C>T (p.Ser332Leu) is a missense variant in exon 12 of MUTYH, a gene associated with autosomal recessive MUTYH-associated polyposis (MAP).
The variant is present at very low frequency in gnomAD (v2.1 AF=0.00512%; v4.1 AF=0.00348%), with no homozygous observations, consistent with PM2 supporting evidence.
Multiple in silico prediction tools concordantly predict a benign effect: REVEL score 0.116 (below 0.5 threshold), BayesDel score -0.476 (predicting benign), and SpliceAI predicts no splicing impact (max delta 0.00). This supports BP4 criteria.
ClinVar submissions predominantly classify this variant as Uncertain significance (7/11 submitters). One clinical laboratory (Ambry Genetics) classifies it as Likely benign. No expert panel classification has been issued.
Functional evidence from D'Agostino et al. 2009 (PMID:19092703) suggesting reduced glycosylase activity for p.S332L was identified through exploratory search but could not be independently verified as full-text was not available in the case materials. This evidence was not applied.
Overall, one supporting pathogenic criterion (PM2) and one supporting benign criterion (BP4) are met, placing this variant in the VUS (Variant of Uncertain Significance) category under generic ACMG/AMP 2015 combination rules.
No criteria match.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
Every interpreted variant in MUTYH, mapped onto the exon structure of NM_001048171.1. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| South Asian41 / 90,744 | 0.00045 |
| East Asian3 / 44,724 | 6.7e-05 |
| Admixed American1 / 59,414 | 1.7e-05 |
| European (non-Finnish)11 / 1,177,952 | 9.3e-06 |
| South Asian11 / 30,074 | 0.00037 |
| East Asian2 / 19,416 | 0.0001 |
| Admixed American1 / 34,558 | 2.9e-05 |
This variant is present in gnomAD v4.1 (AF= 3.47864e-05; MAF= 0.00348%, 56/1609824 alleles, homozygotes = 0) and has highest observed frequency in the South Asian population (AF= 0.000451821; MAF= 0.04518%, 41/90744 alleles, homozygotes = 0); grpmax FAF= 0.00034176.
This variant is present in gnomAD v2.1 (AF= 5.12404e-05; MAF= 0.00512%, 14/273222 alleles, homozygotes = 0) and has highest observed frequency in the South Asian population (AF= 0.000365764; MAF= 0.03658%, 11/30074 alleles, homozygotes = 0); grpmax FAF= 0.00020417.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.116. BayesDel score = -0.475899.
9 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata. None of the listed paper records explicitly indicates that the variant is named.
Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.
The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.
This variant is present in gnomAD v4.1 (AF= 3.47864e-05; MAF= 0.00348%, 56/1609824 alleles, homozygotes = 0) and has highest observed frequency in the South Asian population (AF= 0.000451821; MAF= 0.04518%, 41/90744 alleles, homozygotes = 0); grpmax FAF= 0.00034176.
This variant is present in gnomAD v2.1 (AF= 5.12404e-05; MAF= 0.00512%, 14/273222 alleles, homozygotes = 0) and has highest observed frequency in the South Asian population (AF= 0.000365764; MAF= 0.03658%, 11/30074 alleles, homozygotes = 0); grpmax FAF= 0.00020417.
Error retrieving ClinVar entry.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.116. BayesDel score = -0.475899.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MUTYH, a DNA glycosylase, is frequently mutated in colorectal cancer.
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
This variant does not lie in a statistically significant hotspot.