rs35029074
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_000059.4(BRCA2):c.6323G>A(p.Arg2108His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00126 in 1,608,966 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R2108C) has been classified as Likely 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.6323G>A | p.Arg2108His | missense_variant | Exon 11 of 27 | 5 | NM_000059.4 | ENSP00000369497.3 | ||
BRCA2 | ENST00000530893.7 | c.5954G>A | p.Arg1985His | missense_variant | Exon 11 of 27 | 1 | ENSP00000499438.2 | |||
BRCA2 | ENST00000614259.2 | n.6323G>A | non_coding_transcript_exon_variant | Exon 10 of 26 | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes AF: 0.00243 AC: 370AN: 152124Hom.: 2 Cov.: 33
GnomAD3 exomes AF: 0.00116 AC: 286AN: 245876Hom.: 3 AF XY: 0.000992 AC XY: 132AN XY: 133104
GnomAD4 exome AF: 0.00114 AC: 1661AN: 1456724Hom.: 2 Cov.: 46 AF XY: 0.00104 AC XY: 757AN XY: 724506
GnomAD4 genome AF: 0.00244 AC: 371AN: 152242Hom.: 2 Cov.: 33 AF XY: 0.00223 AC XY: 166AN XY: 74438
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1Benign:11
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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. -
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 = 0.000000000000372 -
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not specified Benign:10
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: ClinVar: Ben by expert panel -
The p.Arg2108His variant has been reported in the literature in 14/19788 proband chromosomes in individuals with breast cancer, prostate cancer and cutaneous melanoma (Borg_2010, Caux-Moncoutier_2009, Caux-Moncoutier_2011,de Sanjose_2003, Diez_2003, Gomez-Garcia_2005, Kote-Jarai_2011, Lindor_2012, Monnerat_2007). It was not, however, found in any of the 100 control chromosomes tested. It is listed in the dbSNP database as coming from a "clinical source" (ID#:rs35029074) with a global minor allele frequency (MAF) of 0.001 (1000 Genomes), increasing the likelihood that this is a low frequency benign variant. The variant was also identified in the LOVD (X2), UMD (X68), Exome server, BIC (X127) and BOCs databases; in the latter database it was classified as a benign variant with an ACMG 5 designation. In the UMD database, this variant has been identified in nine individuals with a second pathogenic in BRCA1 [c.6078dup (p.Arg2027LysfsX22), c.1440_1441delCA (p.Ile481SerfsX32)] and BRCA2 [c.IVS16+6T>C (c.4986+6T>C), c.442_4357del (p.Glu149TyrfsX2), c.4485_4675del (p.Ser1496GlyfsX14), c.2679_2682delGAAA (p.Lys893AsnfsX106)], thereby increasing the likelihood that this variant does not have clinical significance. This residue is not conserved in mammals and the variant amino acid Histidine (His) is present in chicken at this position, increasing the likelihood that an alteration to this residue may not have functional significance. Computational analyses (PolyPhen, SIFT, AlignGVGD) do not predict any effect on the protein function, however, this information is not predictive enough to assume pathogenicity. In summary, based on the above information, this variant is classified as benign. -
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not provided Benign:4
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BRCA2: BP4, BS2 -
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Hereditary cancer-predisposing syndrome Benign:4
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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:3
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Breast and/or ovarian cancer 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. -
Breast neoplasm 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). -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at