About BRCA1
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 ClinGen BRCA1 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.
ENIGMA BRCA1 VCEP Table 9 assigns PS3_Strong for NM_007294.3:c.5432A>G (p.Gln1811Arg) based on three calibrated functional studies (Findlay 2018 PMID:30209399; Petitalot 2019 PMID:30257991; Fernandes 2019 PMID:30765603), all reporting protein function similar to pathogenic control variants. In the ENIGMA Supplementary Table 4 (ST4) functional assay dataset, this variant shows complete functional impact (LOF, IARC class 5 — Pathogenic) with three independent supporting publications.
This variant is absent from gnomAD v2.1 (non-cancer, exome only subset). In gnomAD v4.1, one allele is observed in 1,614,234 alleles (AF=6.19×10⁻⁷; 0.00006%), in the European (non-Finnish) population. This extremely low population frequency meets the ENIGMA PM2_Supporting threshold (absent from v2.1 and v3.1 non-cancer subsets). The single allele in v4.1 at near-zero frequency does not negate this criterion.
No benign criterion marked as applied in the recorded assessment.
ENIGMA BRCA1 Table 3 combining rules applied: one Strong criterion (PS3) plus one Supporting criterion (PM2) does not satisfy any Likely Pathogenic combination (requires 2 Strong, or 1 Strong + 2 Supporting, or 1 Strong + 1-2 Moderate). No benign criteria are met. Under the ENIGMA point-based scoring system, PS3_Strong (4 pts) + PM2_Supporting (1 pt) = 5 pts, which falls within the Uncertain Significance range (-1 to 5). The variant is classified as a Variant of Uncertain Significance (VUS).
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 1 / 1,614,234 alleles. Recorded AF 6.19489e-07. Recorded homozygote count 0.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
6 Likely pathogenic · 2 Uncertain significance · 1 Likely Pathogenic · 1 pathogenic.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
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 ClinGen BRCA1 VCEP v1.2.0, with the data and sources behind each one.
26 criteria with recorded statuses: 2 met · 10 not met · 4 not assessed · 10 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
PS3_Strong is met: three independent calibrated functional studies (Findlay 2018, Petitalot 2019, Fernandes 2019) demonstrate that p.Gln1811Arg exhibits protein function comparable to pathogenic control variants (ENIGMA Table 9; functional impact complete, IARC class 5).
PM2_Supporting is met: the variant is absent from gnomAD v2.1 (non-cancer exomes) and observed at extremely low frequency in gnomAD v4.1 (1/1,614,234 alleles; AF=6.19×10⁻⁷).
PP3 and BP4 are not met: BayesDel no-AF score of 0.192 falls in the intermediate range between the BP4 threshold (≤0.15) and the PP3 threshold (≥0.28) for variants inside the BRCT clinically important domain.
PP4 and BP5 are not met: the clinical-history likelihood ratio (LR=0.993 from Li et al. 2020, N=3 probands) falls within the neutral zone, neither supporting pathogenicity nor benignity.
PVS1, PM5, and BP1 are not applicable: PVS1 is restricted to null variants; PM5_PTC is N/A for exon E21(22) per ENIGMA Table 4; BP1 requires location outside a clinically important functional domain (Gln1811 is within the BRCT domain).
Under ENIGMA Table 3 combining rules, the evidence profile of one Strong criterion (PS3) plus one Supporting criterion (PM2) is insufficient to classify as Likely Pathogenic (requires ≥2 Strong, or 1 Strong + ≥2 Supporting, or 1 Strong + 1–2 Moderate). The variant is classified as a Variant of Uncertain Significance (VUS).
No criteria match.
Every interpreted variant in BRCA1, mapped onto the exon structure of NM_007294.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| European (non-Finnish)1 / 1,180,044 | 8.5e-07 |
This variant is present in gnomAD v4.1 (AF= 6.19489e-07; MAF= 0.00006%, 1/1614234 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.47426e-07; MAF= 0.00008%, 1/1180044 alleles, homozygotes = 0).
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.709. BayesDel score = 0.192033.
7 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
Q1811R — Q — Charge change in putative binding site.
Table 2, line 636–639
Q1811R
Line 846 (supplementary variant listing)
Q1811R — E — S — PI — Variable
Table 1 (line 591–595)
Q1811R and A1843P, found together in LF2, are unclassified variants listed in the Breast Cancer Information Core database.
Table 2 (LF2 clone), Results paragraph describing LF mutants
Q1811R — 54 — fully conserved
Supplementary table (line 1539–1541)
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= 6.19489e-07; MAF= 0.00006%, 1/1614234 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.47426e-07; MAF= 0.00008%, 1/1180044 alleles, homozygotes = 0).
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Likely pathogenic (6 clinical laboratories) and as Uncertain significance (2 clinical laboratories) and as Likely Pathogenic (1 clinical laboratory) and as pathogenic (1 clinical laboratory). (ClinVarID = 55578)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.709. BayesDel score = 0.192033.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
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.