rs80358405
Variant summary
Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBP6
The NM_000059.4(BRCA2):c.10240A>G(p.Thr3414Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,613,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. T3414T) has been classified as Likely benign.
Frequency
Consequence
NM_000059.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Our verdict: Likely_benign. The variant received -3 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.10240A>G | p.Thr3414Ala | missense_variant | Exon 27 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.9871A>G | p.Thr3291Ala | missense_variant | Exon 27 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.*2298A>G | non_coding_transcript_exon_variant | Exon 26 of 26 | 2 | ENSP00000506251.1 | ||||
BRCA2 | ENST00000614259.2 | n.*2298A>G | 3_prime_UTR_variant | Exon 26 of 26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152198Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000239 AC: 6AN: 250592 AF XY: 0.0000148 show subpopulations
GnomAD4 exome AF: 0.00000479 AC: 7AN: 1461626Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4AN XY: 727104 show subpopulations
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152198Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3AN XY: 74372 show subpopulations
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:2Benign:2
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This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
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not specified Uncertain:2
The BRCA2 c.10240A>G; p.Thr3414Alavariant (rs80358405) is reported in the literature in two families with a history of breast and ovarian cancer (Riahi 2015). This variant is reported in ClinVar (Variation ID: 91744) and is found in the non-Finnish European population with an overall allele frequency of 0.006% (8/126308 alleles) in the Genome Aggregation Database. The threonine at codon 3414 is weakly conserved, and computational analyses (SIFT: tolerated, PolyPhen-2: damaging) predict conflicting effects of this variant on protein structure/function. Due to limited information, the clinical significance of the p.Thr3414Ala variant is uncertain at this time. References: Riahi A et al. Mutation spectrum and prevalence of BRCA1 and BRCA2 genes in patients with familial and early-onset breast/ovarian cancer from Tunisia. Clin Genet. 2015 Feb;87(2):155-60. -
Variant summary: BRCA2 c.10240A>G (p.Thr3414Ala) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 2.4e-05 in 250592 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.10240A>G has been reported in the literature in individuals affected with breast cancer without strong evidence of causality (e.g. Riahi_2015, Zhang_2018). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 24372583, 29905759). ClinVar contains an entry for this variant (Variation ID: 91744). Based on the evidence outlined above, the variant was classified as uncertain significance. -
not provided Benign:2
This variant is associated with the following publications: (PMID: 24372583, 28814288, 27211102) -
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Hereditary cancer-predisposing syndrome Benign:2
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. -
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Hereditary breast ovarian cancer syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at