NM_000059.4:c.7102T>G
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_000059.4(BRCA2):c.7102T>G(p.Leu2368Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000174 in 1,613,576 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. 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. L2368W) has been classified as Uncertain significance.
Frequency
Consequence
NM_000059.4 missense
Scores
Clinical Significance
Conservation
Publications
- breast-ovarian cancer, familial, susceptibility to, 2Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen
- Fanconi anemia complementation group D1Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, G2P
- pancreatic cancer, susceptibility to, 2Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
- sarcomaInheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
- hereditary breast ovarian cancer syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Fanconi anemiaInheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
- medulloblastomaInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
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ACMG classification
Our verdict: Likely_benign. The variant received -5 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| BRCA2 | ENST00000380152.8 | c.7102T>G | p.Leu2368Val | missense_variant | Exon 14 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
| BRCA2 | ENST00000530893.7 | c.6733T>G | p.Leu2245Val | missense_variant | Exon 14 of 27 | 1 | ENSP00000499438.2 | |||
| BRCA2 | ENST00000614259.2 | n.7102T>G | non_coding_transcript_exon_variant | Exon 13 of 26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.0000329 AC: 5AN: 152170Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000757 AC: 19AN: 250970 AF XY: 0.0000664 show subpopulations
GnomAD4 exome AF: 0.0000157 AC: 23AN: 1461406Hom.: 0 Cov.: 31 AF XY: 0.0000124 AC XY: 9AN XY: 726978 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000329 AC: 5AN: 152170Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74340 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Benign:3
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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Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1Benign:1
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 provided Uncertain:1Benign:1
This variant is associated with the following publications: (PMID: 21218378, 26689913, 28508593, 29146900, 30093976, 31825140) -
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not specified Benign:2
Variant summary: BRCA2 c.7102T>G (p.Leu2368Val) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 7.8e-05 in 282366 control chromosomes, exclusively found within the East Asian subpopulation with a frequency of 0.0011 in the gnomAD database. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 1.5 fold of the estimated maximal expected allele frequency for a pathogenic variant in BRCA2 causing Hereditary Breast and Ovarian Cancer phenotype (0.00075), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. The variant, c.7102T>G, has been reported in the literature in individuals affected with breast cancer, but without evidence for causality (Carney_2010, Chan_2018). In addition, co-occurrences with another pathogenic BRCA2 variant have been reported (BRCA2 c.7878G>A (p.Trp2626X); in Carney_2010 and in our internal database), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four other clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation, and classified the variant a VUS (1x), Likely benign (2x) and Benign (1x). Based on the evidence outlined above, the variant was classified as benign. -
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Breast and/or ovarian cancer Benign:1
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BRCA2-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Malignant tumor of breast Benign:1
The BRCA2 p.Leu2368Val variant was identified in the literature in an individual with breast cancer (Carney 2010). The variant was identified in co-occurrence with a pathogenic BRCA2 variant (p.Trp2626X) in this individual, increasing the likelihood that the p.Leu2368Val variant may not have clinical significance. The variant was also identified in dbSNP (ID: rs397507382) “With Likely Benign allele”, and in the Clinvar database (classified as a benign variant by the Sharing Clinical Reports Project (SCRP) (derived from Myriad reports); classified as likely benign by Ambry Genetics). The variant occurs outside of the splicing consensus sequence and five in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. The p.Leu2368 residue is not conserved in mammals and the variant amino acid valine (Val) is present in rat, increasing the likelihood that this variant does not have clinical significance. Computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -
Familial cancer of breast Benign:1
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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