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.
This variant is present at extremely low frequency in population databases. In gnomAD v2.1, it is observed in 32 of 282,604 alleles (AF = 0.0113%; 0 homozygotes). In gnomAD v4.1, it is observed in 142 of 1,613,858 alleles (AF = 0.0088%; 0 homozygotes). The highest subpopulation frequency is in the European (Finnish) population at 0.0478% (v2.1). All frequencies are below the 0.1% threshold for PM2 under generic ACMG criteria.
Multiple lines of computational evidence predict a benign effect for this variant. REVEL score is 0.17 (well below pathogenic thresholds), BayesDel score is -0.585 (consistent with benign), and SpliceAI predicts no splicing impact (max delta score = 0.00). The concordance of multiple in silico predictors supports a lack of functional impact.
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: 142 / 1,613,858 alleles. Recorded AF 8.79879e-05. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 0.000113233; MAF= 0.01132%, 32/282604 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000477897; MAF= 0.04779%, 12/25110 alleles, homozygotes = 0); grpmax FAF= 8.821e-05.
Not available in gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
8 Uncertain significance · 5 Likely benign · 1 Benign · 1 likely benign. 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. BARD1, a tumor suppressor involved in the DNA damage response, is altered by mutation in breast and ovarian cancers.
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 · 22 not met · 0 not assessed · 5 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000465.4:c.1409A>G (p.Asn470Ser) is a missense variant in exon 6 of BARD1.
This variant is present at extremely low frequency in gnomAD (v2.1: AF = 0.0113%, 32/282,604 alleles; v4.1: AF = 0.0088%, 142/1,613,858 alleles; 0 homozygotes), meeting PM2 at supporting level.
Multiple in silico tools predict a benign effect: REVEL score 0.17, BayesDel score -0.585, and SpliceAI delta score 0.00, meeting BP4 at supporting level.
The variant was reported as a putative germline mutation in 1 of 60 Japanese familial breast cancer patients and absent from 152 controls (Ishitobi et al., 2003), but this single observation is insufficient for PS4.
No variant-specific functional data exist; the functional study by Toh et al. (2019) characterized BARD1 germline variants but did not include N470S.
BARD1 is a recognized hereditary breast cancer susceptibility gene with a loss-of-function disease mechanism, consistent with tumor suppressor biology.
In ClinVar, this variant is classified as Uncertain significance (review status: criteria provided, single submitter). Multiple clinical laboratories have submitted conflicting classifications: 8 laboratories as VUS, 5 as Likely benign, and 1 as Benign.
The variant lies within the ankyrin repeat domain, a characterized protein-protein interaction domain, but the residue is not within a statistically significant mutational hotspot.
No criteria match.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
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 |
|---|
| European (Finnish)42 / 63,990 | 0.00066 |
| Middle Eastern3 / 6,082 | 0.00049 |
| Admixed American8 / 59,986 | 0.00013 |
| Remaining individuals5 / 62,474 | 8e-05 |
| European (non-Finnish)82 / 1,179,948 | 6.9e-05 |
| African/African American1 / 74,900 | 1.3e-05 |
| South Asian1 / 91,084 | 1.1e-05 |
| European (Finnish)12 / 25,110 | 0.00048 |
| Remaining individuals2 / 7,208 | 0.00028 |
| Admixed American4 / 35,374 | 0.00011 |
| European (non-Finnish)13 / 129,016 | 0.0001 |
| South Asian1 / 30,610 | 3.3e-05 |
This variant is present in gnomAD v4.1 (AF= 8.79879e-05; MAF= 0.00880%, 142/1613858 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000656353; MAF= 0.06564%, 42/63990 alleles, homozygotes = 0); grpmax FAF= 0.0001336.
This variant is present in gnomAD v2.1 (AF= 0.000113233; MAF= 0.01132%, 32/282604 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000477897; MAF= 0.04779%, 12/25110 alleles, homozygotes = 0); grpmax FAF= 8.821e-05.
Not available in gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.17. BayesDel score = -0.584707.
9 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
N470S, which was identified as a germline mutation14.
Figure 1b (mutation map); main text section 'BARD1 mutations and cancer'
No polymorphic variation was detected in a number of SNPs reported in HapMap data and genotyped here, including K312N, R658C, N470S, Q564H, N295S in BARD1
Results section; nsSNP Analysis paragraph
Neuroblastoma chr2:215632365 Missense c.1409A>G p.N470S 51% NO
Table 1 (pediatric BARD1 variant landscape); Results section 'The Landscape of Germline BARD1 Variants in Pediatric Oncology'
we have found one novel germline mutation (Asn/Ser 470). Since such a mutation was not observed in any of 152 healthy controls, it is suggested that Asn/Ser 470 could be a germline mutation causing breast cancer.
Abstract lines 13-15; Results section 3.1; Table 2; Discussion paragraph 4
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= 8.79879e-05; MAF= 0.00880%, 142/1613858 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000656353; MAF= 0.06564%, 42/63990 alleles, homozygotes = 0); grpmax FAF= 0.0001336.
This variant is present in gnomAD v2.1 (AF= 0.000113233; MAF= 0.01132%, 32/282604 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 0.000477897; MAF= 0.04779%, 12/25110 alleles, homozygotes = 0); grpmax FAF= 8.821e-05.
Not available in gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Uncertain significance (8 clinical laboratories) and as Likely benign (5 clinical laboratories) and as Benign (1 clinical laboratory) and as likely benign (1 clinical laboratory). (ClinVarID = 141739)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.17. BayesDel score = -0.584707.
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 not previously been reported in somatic cancers (COSMIC).
This variant does not lie in a statistically significant hotspot.