About MSH6
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 MSH6 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.
No pathogenic criterion marked as applied in the recorded assessment.
This variant is present in gnomAD v4.1 with a grpmax filtering allele frequency of 0.00027673 (0.027673%), which is above the MSH6 BS1 threshold of 0.00022 (0.022%) and below the BA1 threshold of 0.0022 (0.22%); this supports BS1 at Strong strength.
ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for MSH6 Version 2.0.0 v2.0.0 criteria-combination framework was evaluated deterministically with applied criteria: BS1 strong; no rule matched the adjudicated criteria.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 36 / 1,613,998 alleles. Recorded AF 2.23049e-05. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 5.30632e-05; MAF= 0.00531%, 15/282682 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000561167; MAF= 0.05612%, 14/24948 alleles, homozygotes = 0); grpmax FAF= 0.00037952.
No SpliceAI or REVEL score is recorded in the fields used for this tile.
A ClinVar laboratory submission summary was not recorded.
OncoKB has not reviewed this specific variant; no variant-level oncogenicity or biological effect is available. Gene-level context: MSH6, a DNA mismatch repair protein, is frequently mutated in colorectal, small bowel, and endometrial cancers.
No COSMIC evidence statement is recorded in this case.
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen MSH6 VCEP v2.0.0, with the data and sources behind each one.
28 criteria with recorded statuses: 1 met · 3 not met · 13 not assessed · 11 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
The MSH6 c.942C>G (p.Ser314Arg) variant has been reported in ClinVar, where most submissions are classified as likely benign or benign, with additional submissions classified as uncertain significance.
In gnomAD v4.1, this variant is present at an overall allele frequency of 0.0000223049 (36/1613998 alleles), and the grpmax filtering allele frequency is 0.00027673, which is above the MSH6 BS1 threshold of 0.00022 and below the BA1 threshold of 0.0022.
SpliceAI predicts no significant splice impact for this variant, with a maximum delta score of 0.00; however, no HCI prior probability result was identified to support missense PP3 or BP4 assessment under the MSH6 specification.
No criteria match.
GnomAD v4 Grpmax filtering allele frequency ≥ 0.00022 and < 0.0022 (0.022-0.22%) and variant is excluded as founder pathogenic variant.
MSH6 PVS1 applies to specified loss-of-function variant classes, including qualifying nonsense, frameshift, certain splice, large genomic alteration, and confirmed splicing-aberrant variants.
Absent/extremely rare allele frequency <0.00002 (<1 in 50,000 alleles) in gnomAD v4 dataset.
GnomAD v4 Grpmax filtering allele frequency ≥ 0.0022 (0.22%) and variant is excluded as founder pathogenic variant.
Same amino acid substitution as a previously established Pathogenic missense variant for Strong, or as a previously established Likely Pathogenic missense variant with normal RNA result and PM2_Supporting met for Moderate.
Apply by de novo point system: 0.5 Supporting, 1-1.5 Moderate, 2-3.5 Strong, ≥4 Very Strong.
Calibrated functional assays with functional odds for pathogenicity >18.7 for Strong, >4.3 and ≤18.7 or qualifying MMR function defect by flowchart for Moderate, or >2.08 and ≤4.3 for Supporting.
Apply by point system: 0.5 Supporting, 1-1.5 Moderate, 2-3.5 Strong, ≥4 Very Strong.
Different missense change at the same residue as a VCEP-established Pathogenic missense variant for Moderate, or Likely Pathogenic missense variant for Supporting; PM5 requires PP3 support for the new missense change.
Co-segregation with disease in pedigree(s) with a combined Bayes Likelihood Ratio >2.08 for Supporting, >4.3 for Moderate, or >18.7 in at least 2 families for Strong.
Missense variant with HCI prior probability for pathogenicity >0.68 and ≤0.81 for Supporting or >0.81 for Moderate; alternatively non-canonical splicing nucleotides with SpliceAI delta score ≥0.2.
1 qualifying CRC/endometrial MSI-H tumor or consistent MMR protein loss for Supporting, 2 independent qualifying tumors for Moderate, or ≥3 independent qualifying tumors in ≥2 families for Strong.
Co-occurrence in trans with a known pathogenic sequence variant in the same gene in a patient with colorectal cancer after age 45 (or other LS cancer above the median age of onset for that cancer in LS), and who has no previous or current evidence of clinical manifestations of CMMRD. Confirmation of phase requires testing of parents or offspring.
Calibrated functional assays with functional odds for pathogenicity ≤ 0.05 OR variant-specific proficient function in protein and mRNA-based lab assays as per MMR functional assay flowchart at Supporting strength.
Lack of co-segregation with disease in pedigree(s) with a combined Bayes Likelihood Ratio <0.05 for Strong or >0.05 and ≤0.48 for Supporting.
Missense variant with HCI-prior probability of pathogenicity <0.11 OR for intronic and synonymous variants SpliceAI predicts no splicing impact with delta score ≤0.1.
2 or 3 qualifying tumors for Supporting or ≥4 qualifying tumors for Strong with MSS/no loss of MMR protein expression or loss inconsistent with the gene demonstrating variation; alternate MLH1-methylation/BRAF pathway also allowed per CSPEC.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
Not Applicable for this VCEP.
This criterion is not for use as recommended by the ClinGen Sequence Variant Interpretation VCEP Review Committee.
A synonymous (silent) or intronic variant at or beyond -21/+7 (5′/3′ exonic).
Every interpreted variant in MSH6, mapped onto the exon structure of NM_000179.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| African/African American29 / 74,912 | 0.00039 |
| Remaining individuals3 / 62,482 | 4.8e-05 |
| Admixed American1 / 59,990 | 1.7e-05 |
| European (non-Finnish)3 / 1,180,038 | 2.5e-06 |
| African/African American14 / 24,948 | 0.00056 |
| Admixed American1 / 35,426 | 2.8e-05 |
This variant is present in gnomAD v4.1 (AF= 2.23049e-05; MAF= 0.00223%, 36/1613998 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000387121; MAF= 0.03871%, 29/74912 alleles, homozygotes = 0); grpmax FAF= 0.00027673.
This variant is present in gnomAD v2.1 (AF= 5.30632e-05; MAF= 0.00531%, 15/282682 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000561167; MAF= 0.05612%, 14/24948 alleles, homozygotes = 0); grpmax FAF= 0.00037952.
Missense variant with HCI prior probability for pathogenicity >0.68 and ≤0.81 for Supporting or >0.81 for Moderate; alternatively non-canonical splicing nucleotides with SpliceAI delta score ≥0.2.
Missense variant with HCI-prior probability of pathogenicity <0.11 OR for intronic and synonymous variants SpliceAI predicts no splicing impact with delta score ≤0.1.
A synonymous (silent) or intronic variant at or beyond -21/+7 (5′/3′ exonic).
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.188. BayesDel score = -0.304016.
0 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
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= 2.23049e-05; MAF= 0.00223%, 36/1613998 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000387121; MAF= 0.03871%, 29/74912 alleles, homozygotes = 0); grpmax FAF= 0.00027673.
This variant is present in gnomAD v2.1 (AF= 5.30632e-05; MAF= 0.00531%, 15/282682 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000561167; MAF= 0.05612%, 14/24948 alleles, homozygotes = 0); grpmax FAF= 0.00037952.
This variant has been reported in ClinVar as Likely benign (6 clinical laboratories) and as Uncertain significance (4 clinical laboratories) and as Likely Benign (1 clinical laboratory) and as Benign (1 clinical laboratory).
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.188. BayesDel score = -0.304016.
OncoKB has not reviewed this specific variant; no variant-level oncogenicity or biological effect is available. Gene-level context: MSH6, a DNA mismatch repair protein, is frequently mutated in colorectal, small bowel, and endometrial cancers.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV99316054, n = 1 times).
This variant does not lie in a statistically significant hotspot.