rs80358950
Variant summary
Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP6_Very_Strong
The NM_000059.4(BRCA2):c.7232A>C(p.Lys2411Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000279 in 1,613,874 control chromosomes in the GnomAD database, including 1 homozygotes. 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 -8 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.7232A>C | p.Lys2411Thr | missense_variant | Exon 14 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.6863A>C | p.Lys2288Thr | missense_variant | Exon 14 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.7232A>C | non_coding_transcript_exon_variant | Exon 13 of 26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152230Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000597 AC: 15AN: 251296Hom.: 0 AF XY: 0.0000663 AC XY: 9AN XY: 135808
GnomAD4 exome AF: 0.0000294 AC: 43AN: 1461644Hom.: 1 Cov.: 31 AF XY: 0.0000330 AC XY: 24AN XY: 727146
GnomAD4 genome AF: 0.0000131 AC: 2AN: 152230Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74380
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1Benign:5
IARC class based on posterior probability from multifactorial likelihood analysis, thresholds for class as per Plon et al. 2008 (PMID: 18951446). Class 1 based on posterior probability = 0.00026 -
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not specified Benign:5
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Variant summary: BRCA2 c.7232A>C (p.Lys2411Thr) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 6e-05 in 251296 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in BRCA2 causing Hereditary Breast And Ovarian Cancer Syndrome (6e-05 vs 0.00075), allowing no conclusion about variant significance. c.7232A>C has been reported in the literature in individuals undergoing testing for breast cancer (example, Borg_2010, Capanu_2011, Laitman_2012, van der Hout_2006). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. Multifactorial probability studies have reported a neutral impact (example, Easton_2007, Lindor_2012). At-least two co-occurrences with another pathogenic variant(s) have been reported in the UMD and BIC databases (BRCA1 c.5145del, p.Tyr1716fs), providing supporting evidence for a benign role. Multiple publications report experimental evidence evaluating an impact on protein function (example, Guidugli_2012, Ikegami_2020). These results showed no damaging effect of this variant on homology directed repair (HDR) activity. Multiple clinical diagnostic laboratories and an expett panel (ENIGMA) have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All submitters classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -
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not provided Benign:3
BRCA2: BS1 -
The BRCA2 p.Lys2411Thr variant was identified in 2 of 6116 proband chromosomes (frequency: 0.000327) from individuals or families with hereditary breast and ovarian cancer (Borg_2010, Capanu_2011, Laitman_2011) and in 1 of 2796 control chromosomes (freq. 0.00036). The variant was also identified in the following databases: dbSNP (ID: rs80358950) as “With other allele”, ClinVar (as benign by Ambry Genetics and VKGL Data-share Consensus, as likely benign by Counsyl, GeneDx, Quest Diagnostics, Color Genomics, Integrated Genetics, and Invitae, and as uncertain significance by COGR), Clinvitae (4x), LOVD 3.0 (6x), UMD-LSDB (4x as uncertain significance), and ARUP Laboratories (as not pathogenic). The variant was not identified in Cosmic, MutDB, BIC Database, or Zhejiang Colon Cancer Database. The variant was also identified by our laboratory in 1 individual with breast cancer. The variant was identified in control databases in 13 of 246082 chromosomes at a frequency of 0.000053 (Genome Aggregation Database Feb 27, 2017). It was observed in the following populations: “Other” in 9 of 5480 chromosomes (freq: 0.001642), and European (Non-Finnish) in 4 of 111574 chromosomes (freq: 0.000036); it was not observed in the African, Latino, Ashkenazi Jewish, East Asian, European (Finnish), and South Asian populations. One functional study demonstrated homology-directed repair activity of the variant at a level similar to nonpathogenic variants (Guidugli_2014), and four studies using a multifactorial likelihood-ratio model predict the p.Lys2411Thr variant to be neutral (Easton_2007, Guidugli_2013, Lindor_2012, Pruss_2014_25085752). The p.Lys2411 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. 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. -
This variant is associated with the following publications: (PMID: 21990134, 26566278, 21741379, 17924331, 20104584, 20960228, 26689913, 16683254, 24323938, 25085752, 25348012, 23108138, 29036293, 32444794) -
Hereditary cancer-predisposing syndrome Benign:3
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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. -
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). -
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