About BARD1
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.
The variant c.221G>T produces p.Cys74Phe, which resides in the BARD1 RING finger domain (residues ~46-90). The RING domain is critical for BARD1-BRCA1 heterodimerization and E3 ubiquitin ligase activity. C74 is a conserved cysteine within the zinc-coordinating RING structure. Missense alteration of a structurally critical RING domain residue meets PM1 at moderate strength per generic ACMG/AMP criteria.
NM_000465.4:c.221G>T is absent from gnomAD v2.1 and present at very low frequency in gnomAD v4.1 (overall AF = 9.19e-05, 0.0092%; grpmax FAF = 8.91e-05). The allele frequency is well below the 0.1% threshold for PM2 application. Highest subpopulation frequency is in Ashkenazi Jewish (AF = 0.000112, 0.011%). No homozygotes observed.
Multiple in silico predictors support a deleterious effect for NM_000465.4:c.221G>T (p.Cys74Phe). REVEL score is 0.932, which is strongly predictive of pathogenicity (well above the 0.7 threshold). BayesDel score is 0.560, indicating moderate deleterious potential. SpliceAI predicts no significant splicing impact (max delta = 0.05), which does not contradict the missense assessment.
No benign criterion marked as applied in the recorded assessment.
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: PM1 moderate, PM2 moderate, PP3 supporting; combination = 2 moderate + 1 supporting, which maps to VUS.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 135 / 1,469,506 alleles. Recorded AF 9.18676e-05. Recorded homozygote count 0.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.050. Refer to the recorded PP3/BP4 rationale for interpretation.
6 Uncertain significance. ClinVar API review status: criteria provided, multiple submitters, no conflicts.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. BARD1, a tumor suppressor involved in the DNA damage response, is altered by mutation in breast and ovarian cancers.
This variant has previously been reported in somatic cancers (COSMIC; COSV107297670, n = 3 times).
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: 3 met · 21 not met · 0 not assessed · 2 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
This variant resides in the BARD1 RING finger domain (p.Cys74Phe), a critical functional domain required for BRCA1 heterodimerization and E3 ubiquitin ligase activity.
The variant is extremely rare in population databases: absent from gnomAD v2.1 and observed at 0.0092% (135/1,469,506 alleles, 0 homozygotes) in gnomAD v4.1, meeting PM2 threshold (<0.1%).
Multiple in silico predictors support a deleterious effect: REVEL score 0.932 (strongly damaging), BayesDel score 0.560 (moderately deleterious). No splicing impact is predicted (SpliceAI max delta 0.05).
No functional studies have been reported for this variant. OncoKB reports unknown oncogenic effect. Six clinical laboratories in ClinVar classify this variant as Uncertain significance with 1-star review status.
No de novo observations, segregation data, case-control enrichment, or same-residue pathogenic comparators were identified. No literature publication mentions this specific variant.
Applying generic ACMG/AMP 2015 criteria: PM1 (RING domain) + PM2 (rare in population) + PP3 (in silico damaging) = 2 moderate + 1 supporting pathogenic criteria, with zero benign criteria met. This combination is insufficient for Likely Pathogenic classification and supports a classification of Uncertain significance.
No criteria match.
Every interpreted variant in BARD1, mapped onto the exon structure of NM_000465.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| Ashkenazi Jewish3 / 26,718 | 0.00011 |
| European (Finnish)6 / 56,436 | 0.00011 |
| European (non-Finnish)114 / 1,082,550 | 0.00011 |
| African/African American5 / 66,582 | 7.5e-05 |
| Remaining individuals4 / 56,148 | 7.1e-05 |
| South Asian3 / 82,260 | 3.6e-05 |
This variant is present in gnomAD v4.1 (AF= 9.18676e-05; MAF= 0.00919%, 135/1469506 alleles, homozygotes = 0) and has highest observed frequency in the Ashkenazi Jewish population (AF= 0.000112284; MAF= 0.01123%, 3/26718 alleles, homozygotes = 0); grpmax FAF= 8.91e-05.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.05). REVEL score = 0.932. BayesDel score = 0.560394.
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= 9.18676e-05; MAF= 0.00919%, 135/1469506 alleles, homozygotes = 0) and has highest observed frequency in the Ashkenazi Jewish population (AF= 0.000112284; MAF= 0.01123%, 3/26718 alleles, homozygotes = 0); grpmax FAF= 8.91e-05.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Uncertain significance (6 clinical laboratories). (ClinVarID = 234046)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.05). REVEL score = 0.932. BayesDel score = 0.560394.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. BARD1, a tumor suppressor involved in the DNA damage response, is altered by mutation in breast and ovarian cancers.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV107297670, n = 3 times).
This variant does not lie in a statistically significant hotspot.