chr13-32336379-C-G
Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP6
The NM_000059.4(BRCA2):āc.2024C>Gā(p.Thr675Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,664 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000059.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -1 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.2024C>G | p.Thr675Arg | missense_variant | 11/27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.1655C>G | p.Thr552Arg | missense_variant | 11/27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.2024C>G | non_coding_transcript_exon_variant | 10/26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome AF: 6.86e-7 AC: 1AN: 1458664Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1AN XY: 725428
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2Benign:1
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Apr 19, 2023 | This missense variant replaces threonine with arginine at codon 675 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 a multifactorial analysis with co-occurrence and family history likelihood ratios for pathogenicity of 1.0498 and 0.7027 respectively (PMID: 31131967). This variant has not been identified 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. - |
Likely benign, criteria provided, single submitter | curation | University of Washington Department of Laboratory Medicine, University of Washington | Mar 23, 2023 | Missense variant in a coldspot region where missense variants are very unlikely to be pathogenic (PMID:31911673). - |
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 05, 2024 | The p.T675R variant (also known as c.2024C>G), located in coding exon 10 of the BRCA2 gene, results from a C to G substitution at nucleotide position 2024. The threonine at codon 675 is replaced by arginine, an amino acid with similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:2
Uncertain significance, no assertion criteria provided | clinical testing | Breast Cancer Information Core (BIC) (BRCA2) | - | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Counsyl | Jun 02, 2017 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Feb 13, 2024 | Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; Also known as 2252C>G; This variant is associated with the following publications: (PMID: 23704879, 31131967, 29884841, 32377563) - |
Hereditary breast ovarian cancer syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Dec 04, 2024 | This sequence change replaces threonine, which is neutral and polar, with arginine, which is basic and polar, at codon 675 of the BRCA2 protein (p.Thr675Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BRCA2-related conditions. ClinVar contains an entry for this variant (Variation ID: 51236). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt BRCA2 protein function with a negative predictive value of 95%. 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. - |
Familial cancer of breast Benign:1
Likely benign, criteria provided, single submitter | clinical testing | MGZ Medical Genetics Center | Feb 09, 2024 | ACMG codes applied following ENIGMA VCEP rules: BP1_STR, PM2_SUP - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at