About BRCA2
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 likely benign. Select a step to read what it means.
Likely benign.A likely 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 ClinGen BRCA2 VCEP v1.2.0. 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.
ENIGMA Specifications Table 9 assigns BS3_Strong for c.8183T>C p.(Val2728Ala) based on a calibrated functional study (Richardson et al. 2021, PMID:33609447) demonstrating that this variant exhibits protein function similar to benign control variants in a homology-directed repair (HDR) assay.
ENIGMA BP4_Supporting applies to missense variants inside a clinically important functional domain with no predicted impact via protein change or splicing: BayesDel no-AF score ≤0.18 AND SpliceAI ≤0.1. This variant satisfies both conditions (BayesDel=0.103, SpliceAI max delta=0.01) and is located within the BRCA2 DNA binding domain (aa 2481-3186).
ENIGMA BRCA1/BRCA2 v1.2.0 Table 3 classification framework was used as the primary authority. The variant has 1 met Strong Benign criterion (BS3_Strong: calibrated functional assay shows HDR activity similar to benign controls, PMID:33609447) and 1 met Supporting Benign criterion (BP4_Supporting: BayesDel no-AF=0.103 ≤0.18, SpliceAI max delta=0.01 ≤0.1, inside DNA binding domain). No pathogenic criteria are met. The combination of 1 Strong (Benign) + 1 Supporting (Benign) satisfies the ENIGMA Table 3 Likely Benign rule. No conflicting evidence to resolve via the point system.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 4 / 1,614,072 alleles. Recorded AF 2.4782e-06. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 3.18471e-05; MAF= 0.00318%, 1/31400 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000114811; MAF= 0.01148%, 1/8710 alleles, homozygotes = 0).
Recorded SpliceAI maximum delta score: 0.010. Refer to the recorded PP3/BP4 rationale for interpretation.
7 Uncertain significance · 1 Uncertain Significance · 1 Likely benign.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Neutral; curated oncogenicity label: Likely Neutral.
This variant has previously been reported in somatic cancers (COSMIC; COSV105932213, n = 1 times).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen BRCA2 VCEP v1.2.0, with the data and sources behind each one.
29 criteria with recorded statuses: 2 met · 13 not met · 0 not assessed · 14 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000059.4:c.8183T>C (p.Val2728Ala) is a missense variant in exon 18 of BRCA2, located within the DNA binding domain (aa 2481-3186).
This variant is present at extremely low frequency in population databases: gnomAD v2.1 (1/31,400 alleles, exclusively in genomes; exome not covered) and gnomAD v4.1 (4/1,614,072 alleles, grpmax FAF=1.746e-05). It is absent from gnomAD-Canada v1.0.
In ClinVar (Variation ID 141399), this variant is classified as Uncertain Significance by seven clinical laboratories and Likely Benign by one laboratory (criteria provided, single submitter).
ENIGMA Specifications Table 9 assigns BS3_Strong based on a calibrated functional study (Richardson et al. 2021, PMID:33609447) demonstrating that V2728A exhibits HDR activity similar to benign control variants.
ENIGMA BP4_Supporting is met: the variant is inside the DNA binding domain with no predicted impact via protein change (BayesDel no-AF=0.103, ≤0.18) and no predicted splicing impact (SpliceAI max delta=0.01, ≤0.1).
The clinical-history likelihood ratio from Li et al. 2020 (PMID:31853058) is LR=1.24 based on 1 proband, falling in the neutral zone and providing no evidence for PP4 or BP5.
No pathogenic comparator exists at residue Val2728 (c.8182G>A p.Val2728Ile is classified as benign by ENIGMA), so PS1 is not met. PVS1, PM5, and other null-variant criteria are not applicable to this missense substitution.
Applying ENIGMA Table 3 combination rules: BS3_Strong (1 Strong Benign) + BP4_Supporting (1 Supporting Benign) meets the likely benign rule [1 Strong (Benign) + 1 Supporting (Benign)]. The total benign evidence is one Strong and one Supporting criterion with no pathogenic criteria met.
No criteria match.
Every interpreted variant in BRCA2, mapped onto the exon structure of NM_000059.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| African/African American4 / 74,924 | 5.3e-05 |
| African/African American1 / 8,710 | 0.00011 |
This variant is present in gnomAD v4.1 (AF= 2.4782e-06; MAF= 0.00025%, 4/1614072 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 5.33874e-05; MAF= 0.00534%, 4/74924 alleles, homozygotes = 0); grpmax FAF= 1.746e-05.
This variant is present in gnomAD v2.1 (AF= 3.18471e-05; MAF= 0.00318%, 1/31400 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000114811; MAF= 0.01148%, 1/8710 alleles, homozygotes = 0).
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.01). REVEL score = 0.614. BayesDel score = 0.103001.
8 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= 2.4782e-06; MAF= 0.00025%, 4/1614072 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 5.33874e-05; MAF= 0.00534%, 4/74924 alleles, homozygotes = 0); grpmax FAF= 1.746e-05.
This variant is present in gnomAD v2.1 (AF= 3.18471e-05; MAF= 0.00318%, 1/31400 alleles, homozygotes = 0) and has highest observed frequency in the African/African American population (AF= 0.000114811; MAF= 0.01148%, 1/8710 alleles, homozygotes = 0).
This variant has been reported in ClinVar as Uncertain significance (7 clinical laboratories) and as Uncertain Significance (1 clinical laboratory) and as Likely benign (1 clinical laboratory). (ClinVarID = 141399)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.01). REVEL score = 0.614. BayesDel score = 0.103001.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Neutral; curated oncogenicity label: Likely Neutral.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV105932213, n = 1 times).
This variant does not lie in a statistically significant hotspot.