rs1450325987
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1PS1_Moderate
The ENST00000530893.7(BRCA2):āc.2T>Cā(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000549 in 1,457,868 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 0.0000055 ( 0 hom. )
Consequence
BRCA2
ENST00000530893.7 start_lost
ENST00000530893.7 start_lost
Scores
1
15
Clinical Significance
Conservation
PhyloP100: 0.152
Genes affected
BRCA2 (HGNC:1101): (BRCA2 DNA repair associated) Inherited mutations in BRCA1 and this gene, BRCA2, confer increased lifetime risk of developing breast or ovarian cancer. Both BRCA1 and BRCA2 are involved in maintenance of genome stability, specifically the homologous recombination pathway for double-strand DNA repair. The largest exon in both genes is exon 11, which harbors the most important and frequent mutations in breast cancer patients. The BRCA2 gene was found on chromosome 13q12.3 in human. The BRCA2 protein contains several copies of a 70 aa motif called the BRC motif, and these motifs mediate binding to the RAD51 recombinase which functions in DNA repair. BRCA2 is considered a tumor suppressor gene, as tumors with BRCA2 mutations generally exhibit loss of heterozygosity (LOH) of the wild-type allele. [provided by RefSeq, May 2020]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 10 ACMG points.
PVS1
?
Start lost variant, no new inframe start found.
PS1
?
Another start lost variant in ENST00000530893.7 (BRCA2) was described as [Pathogenic] in ClinVar as 491255
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BRCA2 | NM_000059.4 | c.371T>C | p.Met124Thr | missense_variant | 4/27 | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.371T>C | p.Met124Thr | missense_variant | 4/27 | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
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32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251190Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135802
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GnomAD4 exome AF: 0.00000549 AC: 8AN: 1457868Hom.: 0 Cov.: 30 AF XY: 0.00000689 AC XY: 5AN XY: 725530
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GnomAD4 genome ? Cov.: 32
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Aug 22, 2022 | This missense variant replaces methionine with threonine at codon 124 of the BRCA2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in at least 1 individual affected with ovarian cancer (PMID: 29240602, 32019284) and in 1 unaffected individual (PMID: 33471991; Leiden Open Variation Database DB-ID BRCA2_001569). This variant has been identified in 1/251190 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Hereditary breast ovarian cancer syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 24, 2022 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BRCA2 protein function. ClinVar contains an entry for this variant (Variation ID: 462304). This missense change has been observed in individual(s) with ovarian cancer (PMID: 29240602). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 124 of the BRCA2 protein (p.Met124Thr). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
M_CAP
Benign
D
MetaRNN
Benign
T;T
MetaSVM
Benign
T
MutationTaster
Benign
N;N
PrimateAI
Benign
T
PROVEAN
Benign
N;N
REVEL
Uncertain
Sift
Benign
T;T
Sift4G
Benign
T;T
Vest4
MutPred
Gain of relative solvent accessibility (P = 0.0249);Gain of relative solvent accessibility (P = 0.0249);
MVP
MPC
0.021
ClinPred
T
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
gMVP
Splicing
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Calibrated prediction
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at