13-32371035-A-C
Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2
The NM_000059.4(BRCA2):āc.8567A>Cā(p.Glu2856Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00246 in 1,614,178 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/19 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 Benign. Variant got -9 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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BRCA2 | ENST00000380152.8 | c.8567A>C | p.Glu2856Ala | missense_variant | Exon 20 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.8198A>C | p.Glu2733Ala | missense_variant | Exon 20 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.*625A>C | non_coding_transcript_exon_variant | Exon 19 of 26 | 2 | ENSP00000506251.1 | ||||
BRCA2 | ENST00000614259 | n.*625A>C | 3_prime_UTR_variant | Exon 19 of 25 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.00148 AC: 225AN: 152214Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.00107 AC: 269AN: 251244Hom.: 0 AF XY: 0.00105 AC XY: 142AN XY: 135778
GnomAD4 exome AF: 0.00256 AC: 3740AN: 1461846Hom.: 8 Cov.: 31 AF XY: 0.00245 AC XY: 1784AN XY: 727228
GnomAD4 genome AF: 0.00148 AC: 225AN: 152332Hom.: 0 Cov.: 32 AF XY: 0.00118 AC XY: 88AN XY: 74492
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Benign:11
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This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
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not specified Uncertain:1Benign:8
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This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
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Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: ClinVar: 10 labs classify as LB/Ben; ExAC: 0.1% (94/66682) European chromosomes -
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The p.Glu2856Ala variant is identified in the literature in 26 out of 7714 proband chromosomes (frequency 0.003) with breast, ovarian and prostate cancers, however it is also identified in 16 out of 5286 control chromosomes (frequency 0.003) (Spitzer 2000, Borg 2010, Soegaard 2008, Edwards 2003, Chenevix-Trench 2006, Evans 2008), and listed in dbSNP database as coming from a "clinical source" (ID#: rs11571747) with an average heterozygosity of 0.002+/-0.031 in various human populations, therefore increasing the likelihood of this variant to be benign. In the UMD database, this variant has been identified in two (out of 23) individuals with breast or ovarian cancers, where a second pathogenic BRCA1 or BRCA2 mutation was also detected, and also found in an breast cancer individual in the homozygous state (Chenevix-Trench 2006), further suggesting the benign nature of this variant. The p.Glu2856 residue is conserved in mammals and computational analyses (PolyPhen2, SIFT, AlignGVGD) provide inconsistent predictions regarding the impact to the protein, leaning more towards deleterious, but this information is not predictive enough to assume pathogenicity. Furthermore, Myriad genetics has reported this variant as a polymorphism increasing the likelihood this variant is benign (personal communication). Based on the above information, this variant is classified as Benign. -
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not provided Benign:6
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BRCA2: BP4, BS3:Moderate, BS1 -
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Hereditary cancer-predisposing syndrome Benign:5
This alteration is classified as 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. -
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Hereditary breast ovarian cancer syndrome Benign:4
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Breast and/or ovarian cancer Uncertain:1Benign:1
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Fanconi anemia complementation group D1 Benign:1
This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
BRCA2-related cancer predisposition Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at