rs11571769
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_000059.4(BRCA2):c.8851G>A(p.Ala2951Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00692 in 1,613,810 control chromosomes in the GnomAD database, including 134 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).
Frequency
Consequence
NM_000059.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -20 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.8851G>A | p.Ala2951Thr | missense_variant | Exon 22 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.8482G>A | p.Ala2828Thr | missense_variant | Exon 22 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.*909G>A | non_coding_transcript_exon_variant | Exon 21 of 26 | 2 | ENSP00000506251.1 | ||||
BRCA2 | ENST00000614259 | n.*909G>A | 3_prime_UTR_variant | Exon 21 of 25 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.00835 AC: 1270AN: 152172Hom.: 34 Cov.: 33
GnomAD3 exomes AF: 0.00955 AC: 2395AN: 250796Hom.: 41 AF XY: 0.00886 AC XY: 1201AN XY: 135576
GnomAD4 exome AF: 0.00677 AC: 9893AN: 1461520Hom.: 96 Cov.: 31 AF XY: 0.00681 AC XY: 4951AN XY: 727048
GnomAD4 genome AF: 0.00841 AC: 1281AN: 152290Hom.: 38 Cov.: 33 AF XY: 0.00972 AC XY: 724AN XY: 74480
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Benign:13
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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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The BRCA2 c.8851G>A variant is classified as Benign -
Class 1 not pathogenic based on frequency >1% in an outbred sampleset. Frequency 0.036 (Admixed American/Latino), 0.0215 (South Asian), derived from 1000 genomes (2013-05-02). -
not specified Benign:9Other:1
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: ExAC: 3.5% (402/11526) Latino chromosomes -
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not provided Benign:6
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BRCA2: PM5, BP4, BS1, BS2 -
Hereditary cancer-predisposing syndrome Benign:5
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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:5
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Malignant tumor of breast Benign:2
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The p.Ala2951Thr variant has been reported in our laboratory as well as in the literature in 36/5864 (0.006 frequency) proband chromosomes and in 1/1018 control chromosomes (0.001 frequency) (Bergthorsson_2001_11389159, Borg_2010_20104584, Saxena_2006_17018160, Lin_2003_12815053, Spitzer_2000_10699917, Serova-Sinilnikova_1997_9150172, Weber_2006_16685647, Wagner_1999_9971877, Waddell_2008_18497862). It is listed in dbSNP database (ID#:rs11571769) but no frequency information was provided, and so the prevalence of this variant in the general population is not known. The p.Ala2951 residue is conserved across vertebrate species, and computational analyses (PolyPhen2, SIFT, AlignGVGD) suggest that the p.Ala2951Thr variant may impact the protein. However, this information is not predictive enough to assume pathogenicity. In one study, this variant did not co-segregate with cancer in three families, and its frequency in 4680 clinical samples was similar to that of the control population (Deffenbaugh_2002_12215251). Notably, this variant has been identified in the UMD database in a total of 15 individuals who had a second pathogenic variant (9 with BRCA2 mutations and 6 with BRCA1) and associated with a breast or ovarian cancer phenotype, increasing the likelihood that the p.Ala2951Thr variant does not have clinical significance. In addition, Myriad calls this variant as a polymorphism. In summary, based on the above information this variant is classified as benign. -
Familial cancer of breast Benign:2
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Ovarian cancer Pathogenic:1
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Breast and/or ovarian cancer Benign:1
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BRCA2-related cancer predisposition Benign: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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at