chr13-32357767-A-G
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.
The NM_000059.4(BRCA2):āc.7643A>Gā(p.His2548Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000026 in 1,613,416 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H2548L) has been classified as Uncertain significance.
Frequency
Consequence
NM_000059.4 missense
Scores
Clinical Significance
Conservation
Genome browser will be placed here
ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BRCA2 | NM_000059.4 | c.7643A>G | p.His2548Arg | missense_variant | 16/27 | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.7643A>G | p.His2548Arg | missense_variant | 16/27 | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152204Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251018Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135682
GnomAD4 exome AF: 0.0000267 AC: 39AN: 1461212Hom.: 0 Cov.: 31 AF XY: 0.0000248 AC XY: 18AN XY: 726930
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152204Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74362
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:3
Uncertain significance, no assertion criteria provided | clinical testing | Breast Cancer Information Core (BIC) (BRCA2) | Feb 20, 2004 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Nov 20, 2023 | This missense variant replaces histidine with arginine at codon 2548 of the BRCA2 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in a breast cancer case-control meta-analysis in 1/60465 cases and 3/53458 unaffected individuals (PMID: 33471991; Leiden Open Variation Database DB-ID BRCA2_003368). This variant has been identified in 1/251018 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. - |
Uncertain significance, no assertion criteria provided | clinical testing | Sharing Clinical Reports Project (SCRP) | Mar 06, 2007 | - - |
Hereditary cancer-predisposing syndrome Uncertain:1Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 09, 2021 | This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Apr 05, 2023 | This missense variant replaces histidine with arginine at codon 2548 of the BRCA2 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in a breast cancer case-control meta-analysis in 1/60465 cases and 3/53458 unaffected individuals (PMID: 33471991; Leiden Open Variation Database DB-ID BRCA2_003368). This variant has been identified in 1/251018 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. - |
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | May 13, 2024 | Variant summary: BRCA2 c.7643A>G (p.His2548Arg) results in a non-conservative amino acid change located in the helical domain (IPR015252) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 251018 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.7643A>G in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. The following publications have been ascertained in the context of this evaluation (PMID: 19043619, 25348012). ClinVar contains an entry for this variant (Variation ID: 38112). Based on the evidence outlined above, the variant was classified as uncertain significance. - |
Familial cancer of breast Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Dec 22, 2023 | - - |
Hereditary breast ovarian cancer syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jan 20, 2024 | This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 2548 of the BRCA2 protein (p.His2548Arg). This variant is present in population databases (rs80358992, gnomAD 0.0009%). This missense change has been observed in individual(s) with clinical features of BRCA2-related conditions (PMID: 10923033). ClinVar contains an entry for this variant (Variation ID: 38112). 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 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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at