About MLH1
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. Select a step to read what it means.
Not classified yet.Select a step to read what it means.
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 MLH1 VCEP v2.0.0. 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_000249.4:c.1094G>A is absent from gnomAD v4.1 (and v2.1), satisfying the VCEP PM2_Supporting rule: absent/extremely rare allele frequency <0.00002 (<1 in 50,000 alleles) in the gnomAD v4 dataset.
Per the MLH1 VCEP v2.0.0, BP4_Supporting is met when the HCI prior probability of pathogenicity is <0.11 for missense variants. The HCI prior for c.1094G>A (p.Ser365N) is 0.0025, which is well below the threshold. Additionally, REVEL score is 0.321 and BayesDel score is -0.220172, both consistent with a benign in silico prediction profile.
ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for MLH1 Version 2.0.0 v2.0.0 criteria-combination framework: matched Rule31 (Benign.Supporting >=1 + Pathogenic.Supporting >=1) with applied criteria: PM2 supporting, BP4 supporting benign; maps to Uncertain Significance - Conflicting Evidence.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1 allele counts were not recorded for this variant.
Absent from gnomAD v2.1.
Recorded SpliceAI maximum delta score: 0.010. Refer to the recorded PP3/BP4 rationale for interpretation.
4 Uncertain significance.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MLH1, a DNA mismatch repair protein, is recurrently altered by deletion and mutation in various cancer types.
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 MLH1 VCEP v2.0.0, with the data and sources behind each one.
26 criteria with recorded statuses: 2 met · 5 not met · 9 not assessed · 10 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000249.4:c.1094G>A (p.Ser365Asn) is a missense variant in exon 12 of MLH1, absent from gnomAD v4.1 and v2.1 (PM2_Supporting per VCEP v2.0.0).
In silico predictors strongly favor a benign effect: HCI prior probability is 0.0025 (BP4_Supporting per VCEP, threshold <0.11), REVEL score is 0.321, and BayesDel score is -0.220172.
SpliceAI predicts no splicing impact (max delta score 0.01), confirming the variant does not create a cryptic splice site.
The InSiGHT Locus-Specific Database (Thompson et al. 2013, PMID:22949387) classifies this variant as Class 5 (Pathogenic) based on a multifactorial likelihood model incorporating yeast-based MMR functional defect data and co-segregation in multiple families, but the quantitative calibrated functional odds and segregation likelihood ratios required for VCEP PS3 and PP1 strength assignment were not available in the case materials.
ClinVar reports this variant as Uncertain Significance (4 clinical laboratories, criteria provided single submitter, ClinVar ID 1790197).
No tumor pathology data (MSI status, MMR IHC, BRAF V600E, MLH1 methylation) was available to assess PP4 or BP5.
Several criteria designated as Not Applicable by the VCEP were not assessed: PVS1 (missense, not null), PS4, PM1, PM6, PP2, PP5, BP1, BP2, BP6, BP7.
No criteria match.
Every interpreted variant in MLH1, mapped onto the exon structure of NM_000249.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
Absent from gnomAD v4.1.
Absent from gnomAD v2.1.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.01). REVEL score = 0.321. BayesDel score = -0.220172. HCI prior probability for pathogenicity = 0.0025. Custom PP2 score = 0.007.
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.
Absent from gnomAD v4.1.
Absent from gnomAD v2.1.
This variant has been reported in ClinVar as Uncertain significance (4 clinical laboratories). (ClinVarID = 1790197)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.01). REVEL score = 0.321. BayesDel score = -0.220172. HCI prior probability for pathogenicity = 0.0025. Custom PP2 score = 0.007.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MLH1, a DNA mismatch repair protein, is recurrently altered by deletion and mutation in various cancer types.
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.