About MBD4
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 Not recorded. 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_003925.3:c.682G>C is present at extremely low frequency in population databases: gnomAD v2.1 overall allele frequency is 0.011% (31/282,140 alleles) and gnomAD v4.1 overall allele frequency is 0.0079% (127/1,614,038 alleles), both below the 0.1% PM2 threshold. No homozygotes are observed. The highest subpopulation frequency is in the Finnish population at 0.032% (v2.1), also well below 0.1%.
Multiple lines of computational evidence unanimously predict a benign effect: REVEL score 0.199, BayesDel score −0.381, SpliceAI max delta 0.00, and CADD 7.985. Repo et al. 2020 also reported in silico predictions as polymorphism (MutationTaster), benign (PolyPhen), tolerated (SIFT), and no splicing impact (HSF), supporting BP4 at supporting strength.
gene-specific framework 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; 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: 127 / 1,614,038 alleles. Recorded AF 7.86846e-05. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 0.000109875; MAF= 0.01099%, 31/282140 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000318522; MAF= 0.03185%, 8/25116 alleles, homozygotes = 0); grpmax FAF= 0.00030441.
Not available in gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
1 Likely benign · 1 Uncertain significance. ClinVar API review status: criteria provided, conflicting classifications.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MBD4, a DNA glycosylase, is infrequently altered in 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 Not recorded, with the data and sources behind each one.
29 criteria with recorded statuses: 2 met · 20 not met · 0 not assessed · 7 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_003925.3:c.682G>C (p.Val228Leu) is a missense variant in MBD4 exon 3, observed at extremely low frequency in population databases (gnomAD v2.1 AF = 0.011%, 31/282,140 alleles; gnomAD v4.1 AF = 0.0079%, 127/1,614,038 alleles; no homozygotes).
Multiple in silico tools unanimously predict a benign effect: REVEL score 0.199, BayesDel score −0.381, SpliceAI max delta 0.00, and CADD 7.985. Repo et al. (2020) also reported in silico predictions as polymorphism, benign, tolerated, and no splicing impact.
This variant has been reported in ClinVar as Likely benign by Ambry Genetics (SCV005618014) and as Uncertain significance by Invitae (SCV003476936). No expert panel review has been performed (ClinVar Variation ID: 2163156).
The variant was identified in 1 of 440 Finnish patients with uveal melanoma (Repo et al. 2020). The authors considered it likely benign based on in silico predictions and noted no enrichment in cases compared to the Finnish population frequency (0.032%).
No functional studies, segregation data, de novo observations, or case-control association data are available for this variant. MBD4 is not an established gene where missense variants are a common disease mechanism; the primary pathogenic mechanism is loss of function via truncating variants.
Based on generic ACMG/AMP 2015 criteria, the evidence profile consists of PM2_supporting (low population frequency) and BP4_supporting (multiple benign in silico predictions). These opposing criteria result in an overall classification of Uncertain significance.
No criteria match.
No further detail was recorded.
No further detail was recorded.
Every interpreted variant in MBD4, mapped onto the exon structure of NM_003925.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| European (Finnish)19 / 63,998 | 0.0003 |
| European (non-Finnish)106 / 1,180,050 | 9e-05 |
| Remaining individuals2 / 62,488 | 3.2e-05 |
| European (Finnish)8 / 25,116 | 0.00032 |
| European (non-Finnish)23 / 128,546 | 0.00018 |
This variant is present in gnomAD v4.1 (AF= 7.86846e-05; MAF= 0.00787%, 127/1614038 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000296884; MAF= 0.02969%, 19/63998 alleles, homozygotes = 0); grpmax FAF= 7.573e-05.
This variant is present in gnomAD v2.1 (AF= 0.000109875; MAF= 0.01099%, 31/282140 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000318522; MAF= 0.03185%, 8/25116 alleles, homozygotes = 0); grpmax FAF= 0.00030441.
Not available in gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.199. BayesDel score = -0.380622.
6 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
Three rare exon 3 missense variants, c.682G>C (rs140696334, Val228Leu), c.1036G>A (rs140693, Glu346Lys) and c.1073T>C (rs2307298, Ile358Thr) were identified in 6 patients... Based on in silico predictions (Table 1) and without further evidence, we consider the exon 3 variants to be likely benign.
Results, paragraph 4; Table 1
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= 7.86846e-05; MAF= 0.00787%, 127/1614038 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000296884; MAF= 0.02969%, 19/63998 alleles, homozygotes = 0); grpmax FAF= 7.573e-05.
This variant is present in gnomAD v2.1 (AF= 0.000109875; MAF= 0.01099%, 31/282140 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000318522; MAF= 0.03185%, 8/25116 alleles, homozygotes = 0); grpmax FAF= 0.00030441.
Not available in gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Likely benign (1 clinical laboratory) and as Uncertain significance (1 clinical laboratory). (ClinVarID = 2163156)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.199. BayesDel score = -0.380622.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. MBD4, a DNA glycosylase, is infrequently altered in 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.