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 benign. Select a step to read what it means.
Benign.A benign classification under the recorded framework.
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.
No pathogenic criterion marked as applied in the recorded assessment.
This variant is present at extremely high frequency in gnomAD v2.1 (AF=11.619%, 32,849/282,718 alleles, 2,604 homozygotes) and gnomAD v4.1 (AF=11.034%, 178,028/1,613,452 alleles, 11,984 homozygotes). Highest subpopulation frequency in South Asian population (v2.1 AF=24.819%, v4.1 AF=24.583%, grpmax FAF=24.313%). Far exceeds the BA1 threshold of >1% allele frequency in any general population. This variant is a common polymorphism.
Variant is present at allele frequencies far exceeding the expected frequency for any MBD4-related autosomal dominant disorder. gnomAD v2.1 AF=11.619% overall, with subpopulation frequencies ranging from 3.9% (Finnish) to 24.8% (South Asian). In every subpopulation, the frequency exceeds the BS1 threshold of >0.3%. The variant is observed in 2,604 homozygous individuals in v2.1 alone, incompatible with a highly penetrant Mendelian disease.
The variant is observed in homozygous state in 2,604 individuals in gnomAD v2.1 and 11,984 individuals in gnomAD v4.1. For a gene where germline loss-of-function variants are associated with a multi-tumor predisposition syndrome (per PVS1 gene context), observation of this many homozygotes in population databases is incompatible with a pathogenic role. The homozygous count far exceeds what would be expected for a disease-causing variant.
Multiple lines of computational evidence support no impact on splicing or gene product. SpliceAI predicts no splicing alteration (max delta score 0.02, below the 0.1 threshold). The variant is synonymous (p.Gly465=) and produces no amino acid change. No in silico tool predicts a damaging consequence.
This is a synonymous variant (p.Gly465=) for which splice prediction algorithms predict no impact to the splice consensus sequence or creation of a new splice site (SpliceAI max delta score 0.02). The nucleotide at this position is not highly conserved, as evidenced by the extremely high population frequency (gnomAD AF 11.6%, 2,604 homozygotes), which is incompatible with a position under strong purifying selection.
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: BA1 stand-alone benign, BS1 strong benign, BS2 strong benign, BP4 supporting benign, BP7 supporting benign; combination = 1 stand-alone benign + 2 strong benign + 2 supporting benign, which maps to Benign.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 178,028 / 1,613,452 alleles. Recorded AF 0.11034. Recorded homozygote count 11984.
This variant is present in gnomAD v2.1 (AF= 0.11619; MAF= 11.61900%, 32849/282718 alleles, homozygotes = 2604) and has highest observed frequency in the South Asian population (AF= 0.248187; MAF= 24.81871%, 7598/30614 alleles, homozygotes = 1009); grpmax FAF= 0.243522.
This variant is present in gnomAD-Canada v1.0 (AF= 0.12491853139257006, 2300/18412 alleles, homozygotes = 167).
Recorded SpliceAI maximum delta score: 0.020. Refer to the recorded PP3/BP4 rationale for interpretation.
5 Benign. ClinVar API review status: criteria provided, multiple submitters, no conflicts.
OncoKB identified curated literature and non-variant-specific oncogenicity context for review; listed oncogenicity label: Unknown Oncogenic Effect.
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.
26 criteria with recorded statuses: 5 met · 18 not met · 0 not assessed · 3 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_001276270.2:c.1395C>T (p.Gly465=) is a synonymous variant in MBD4 present at extremely high frequency in population databases.
In gnomAD v2.1, this variant is observed in 32,849 of 282,718 alleles (AF=11.619%) including 2,604 homozygotes, with the highest subpopulation frequency in South Asians (AF=24.819%, 1,009 homozygotes).
In gnomAD v4.1, this variant is observed in 178,028 of 1,613,452 alleles (AF=11.034%) including 11,984 homozygotes.
The allele frequency far exceeds the BA1 stand-alone benign threshold of >1% in any general population, establishing this variant as a common polymorphism.
SpliceAI predicts no splicing impact (max delta score 0.02), consistent with the synonymous nature of this substitution.
Five clinical laboratories in ClinVar have classified this variant as Benign (ClinVarID 1262431), though review status is single-submitter level without expert panel consensus.
No functional studies, segregation data, or de novo observations for this variant were identified in the reviewed literature.
The very high population frequency (11.6% overall, thousands of homozygotes) alone is sufficient to classify this variant as Benign under generic ACMG/AMP 2015 framework.
No criteria match.
Every interpreted variant in MBD4, mapped onto the exon structure of NM_001276270.2. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| South Asian22384 / 91,056 | 0.252999 hom |
| African/African American16543 / 74,950 | 0.221864 hom |
| Ashkenazi Jewish4957 / 29,598 | 0.17426 hom |
| Middle Eastern947 / 6,062 | 0.1694 hom |
| Remaining individuals7640 / 62,488 | 0.12533 hom |
| Amish96 / 912 | 0.115 hom |
| European (non-Finnish)114917 / 1,179,522 | 0.0975619 hom |
| Admixed American4913 / 60,018 | 0.082245 hom |
| East Asian2983 / 44,876 | 0.066130 hom |
| European (Finnish)2648 / 63,970 | 0.04169 hom |
| South Asian7598 / 30,614 | 0.251009 hom |
| African/African American5425 / 24,936 | 0.22606 hom |
| Ashkenazi Jewish1729 / 10,370 | 0.17139 hom |
| Remaining individuals848 / 7,212 | 0.1259 hom |
| European (non-Finnish)12250 / 129,112 | 0.095592 hom |
| East Asian1527 / 19,946 | 0.07766 hom |
| Admixed American2485 / 35,436 | 0.07110 hom |
| European (Finnish)987 / 25,092 | 0.03923 hom |
This variant is present in gnomAD v4.1 (AF= 0.11034; MAF= 11.03398%, 178028/1613452 alleles, homozygotes = 11984) and has highest observed frequency in the South Asian population (AF= 0.245827; MAF= 24.58267%, 22384/91056 alleles, homozygotes = 2999); grpmax FAF= 0.24313.
This variant is present in gnomAD v2.1 (AF= 0.11619; MAF= 11.61900%, 32849/282718 alleles, homozygotes = 2604) and has highest observed frequency in the South Asian population (AF= 0.248187; MAF= 24.81871%, 7598/30614 alleles, homozygotes = 1009); grpmax FAF= 0.243522.
This variant is present in gnomAD-Canada v1.0 (AF= 0.12491853139257006, 2300/18412 alleles, homozygotes = 167).
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02).
7 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= 0.11034; MAF= 11.03398%, 178028/1613452 alleles, homozygotes = 11984) and has highest observed frequency in the South Asian population (AF= 0.245827; MAF= 24.58267%, 22384/91056 alleles, homozygotes = 2999); grpmax FAF= 0.24313.
This variant is present in gnomAD v2.1 (AF= 0.11619; MAF= 11.61900%, 32849/282718 alleles, homozygotes = 2604) and has highest observed frequency in the South Asian population (AF= 0.248187; MAF= 24.81871%, 7598/30614 alleles, homozygotes = 1009); grpmax FAF= 0.243522.
This variant is present in gnomAD-Canada v1.0 (AF= 0.12491853139257006, 2300/18412 alleles, homozygotes = 167).
This variant has been reported in ClinVar as Benign (5 clinical laboratories). (ClinVarID = 1262431)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02).
OncoKB identified curated literature and non-variant-specific oncogenicity context for review; listed oncogenicity label: Unknown Oncogenic Effect.
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.