rs11571657
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_000059.4(BRCA2):c.5640T>G(p.Asn1880Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000517 in 1,612,424 control chromosomes in the GnomAD database, including 5 homozygotes. 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 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.5640T>G | p.Asn1880Lys | missense_variant | Exon 11 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.5271T>G | p.Asn1757Lys | missense_variant | Exon 11 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.5640T>G | non_coding_transcript_exon_variant | Exon 10 of 26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.00265 AC: 404AN: 152166Hom.: 2 Cov.: 33
GnomAD3 exomes AF: 0.000771 AC: 192AN: 249036Hom.: 2 AF XY: 0.000535 AC XY: 72AN XY: 134598
GnomAD4 exome AF: 0.000294 AC: 429AN: 1460140Hom.: 3 Cov.: 43 AF XY: 0.000252 AC XY: 183AN XY: 726230
GnomAD4 genome AF: 0.00265 AC: 404AN: 152284Hom.: 2 Cov.: 33 AF XY: 0.00255 AC XY: 190AN XY: 74470
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1Benign:8
Variant allele has low bioinformatic likelihood to encode a missense alteration affecting protein function (Missense prior probability 0.02; http://priors.hci.utah.edu/PRIORS/), AND low bioinformatic likelihood to alter mRNA splicing (splicing prior 0.02; http://priors.hci.utah.edu/PRIORS/), AND minor allele frequency 0.00909 (African), derived from gnomAD v2.1.1 non-cancer (2019-05-13). -
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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 p.Asn1880Lys variant has been previously observed in 7/5248 (frequency: 0.001) proband chromosomes from individuals with a family history of breast and/or ovarian cancer (Borg 2010, Haffty 2009, Real 2002, Weitzel 2005). This individuals racial origin is reported to be of African American ancestry and of the individuals reported in the literature with the p.Asn1880Lys variant, 3 were reported of African American descent. In addition, in the Exome Variant Server this variant was not found in any of the 8,600 Caucasian control chromosomes, but was found in 41/4365 (frequency: 0.009) African American control chromosomes increasing the likelihood that this variant is a benign polymorphism in this population of origin. It should also be noted that this lab has sequenced the BRCA2 gene in a limited number of African American individuals such that the full spectrum of benign variation has not yet been defined for this population, and increasing the possibility that this may be a benign variant. Future analysis could reveal that the p.Asn1880Lys variant is common in this population and therefore unlikely to be of clinical significance. It is listed in dbSNP database as coming from a "clinical source" (ID#: rs11571657) with a global minor allele frequency (MAF) of 0.002 (1000 Genomes) further lending to a benign role for this variant. Finally, this residue is not conserved in mammals and computational analyses (PolyPhen, SIFT, AlignGVGD) do not suggest a high likelihood of impact to the protein, further leaning to a benign role for this variant. In summary, we cannot rule out the possibility that this variant may contribute to the phenotype in this individual, but based on the above information this variant is classified as benign. -
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not specified Benign:6Other:1
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The p.Asn1880Lys variant in BRCA2 is classified as benign because it has been identified in 0.92% (229/24894, 2 homozygotes) of African chromosomes by gnomAD (http://gnomad.broadinstitute.org). This variant was classified as benign on Jun 18, 2019 by the ClinGen-approved ENIGMA expert panel (Variation ID 51896). ACMG/AMP Criteria applied: BA1. -
not provided Benign:4
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This variant is associated with the following publications: (PMID: 21520273, 25637381, 11241844, 27884173, 26332594, 24728327, 11950811, 12624724, 9971877, 20104584, 19491284, 16030099, 22034289, 18724707, 12491487, 27741520) -
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BRCA2: BP4, BS2 -
Hereditary cancer-predisposing syndrome Benign:4
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 Pathogenic: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. -
Breast neoplasm Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at