rs80356910
Variant summary
Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_ModerateBP6_Very_Strong
The NM_007294.4(BRCA1):c.1703C>T(p.Pro568Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000868 in 1,613,200 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts 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. P568A) has been classified as Likely benign.
Frequency
Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000082 ( 1 hom. )
Consequence
BRCA1
NM_007294.4 missense
NM_007294.4 missense
Scores
3
6
10
Clinical Significance
Conservation
PhyloP100: 1.68
Genes affected
BRCA1 (HGNC:1100): (BRCA1 DNA repair associated) This gene encodes a 190 kD nuclear phosphoprotein that plays a role in maintaining genomic stability, and it also acts as a tumor suppressor. The BRCA1 gene contains 22 exons spanning about 110 kb of DNA. The encoded protein combines with other tumor suppressors, DNA damage sensors, and signal transducers to form a large multi-subunit protein complex known as the BRCA1-associated genome surveillance complex (BASC). This gene product associates with RNA polymerase II, and through the C-terminal domain, also interacts with histone deacetylase complexes. This protein thus plays a role in transcription, DNA repair of double-stranded breaks, and recombination. Mutations in this gene are responsible for approximately 40% of inherited breast cancers and more than 80% of inherited breast and ovarian cancers. Alternative splicing plays a role in modulating the subcellular localization and physiological function of this gene. Many alternatively spliced transcript variants, some of which are disease-associated mutations, have been described for this gene, but the full-length natures of only some of these variants has been described. A related pseudogene, which is also located on chromosome 17, has been identified. [provided by RefSeq, May 2020]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -10 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.13979852).
BP6
Variant 17-43093828-G-A is Benign according to our data. Variant chr17-43093828-G-A is described in ClinVar as [Benign]. Clinvar id is 54329.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr17-43093828-G-A is described in Lovd as [Benign].
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
|---|---|---|---|---|---|---|---|
| BRCA1 | NM_007294.4 | c.1703C>T | p.Pro568Leu | missense_variant | 10/23 | ENST00000357654.9 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| BRCA1 | ENST00000357654.9 | c.1703C>T | p.Pro568Leu | missense_variant | 10/23 | 1 | NM_007294.4 | P4 |
Frequencies
GnomAD3 genomes 0.0000132 AC: 2AN: 152068Hom.: 0 Cov.: 32
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GnomAD4 exome AF: 0.00000821 AC: 12AN: 1461132Hom.: 1 Cov.: 34 AF XY: 0.00000688 AC XY: 5AN XY: 726890
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GnomAD4 genome 0.0000132 AC: 2AN: 152068Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74258
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ClinVar
Significance: Benign
Submissions summary: Uncertain:3Benign:12
Revision: reviewed by expert panel
LINK: link
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 1 Uncertain:2Benign:4
| Likely benign, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Feb 24, 2023 | - - |
| Benign, no assertion criteria provided | clinical testing | Sharing Clinical Reports Project (SCRP) | May 01, 2012 | - - |
| Uncertain significance, no assertion criteria provided | clinical testing | Breast Cancer Information Core (BIC) (BRCA1) | May 29, 2002 | - - |
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | 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 did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. - |
| Likely benign, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The BRCA1 p.Pro568Leu variant was identified in the literature in at least two individuals or families with early onset or hereditary breast cancer (Haffty 2009, Judkins 2005); however control chromosomes from healthy individuals were not assessed in these studies, thus the prevalence of the variant in the general population could not be determined. The variant was also identified in dbSNP (ID: rs80356910) “With uncertain significance allele”, the BIC database (8X with unknown clinical importance), LOVD, and UMD (1X as a class 3-UV variant). The variant was classified as a benign variant by the Sharing Clinical Reports Project (SCRP) (submitted within the ClinVar database and derived from Myriad reports) along with submission by Invitae and Ambry stating unknown significance. The p.Pro568 residue is not conserved in mammals and four out of five computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein. In silico studies using evolutionary conservation analysis predict this variant to have no effect on the protein (Fleming 2003) or were inconclusive (Burk-Herrick 2005). In silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. However, it should be noted that all of the above in silico predictions are 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 predicted benign. - |
| Benign, reviewed by expert panel | curation | Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA) | Jun 18, 2019 | 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 = 8.19E-06 - |
not specified Uncertain:1Benign:2
| Benign, criteria provided, single submitter | clinical testing | Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital | Jul 31, 2024 | - - |
| Uncertain significance, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Mar 14, 2017 | - - |
| Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Feb 22, 2024 | Variant summary: BRCA1 c.1703C>T (p.Pro568Leu) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 8.7e-06 in 1613200 control chromosomes in the gnomAD database, including 1 homozygotes. This frequency is not significantly higher than estimated for a pathogenic variant in BRCA1 causing Hereditary Breast And Ovarian Cancer Syndrome (8.7e-06 vs 0.001), allowing no conclusion about variant significance. c.1703C>T has been reported in the literature in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (Judkins_2005, Haffty_2009, Palomba_2009, ElSaghir_2015, Lincoln_2015, Azzollini_2016, Santonocito_2020). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. Co-occurrences with other pathogenic variants have been reported (Azzollini_2016), providing supporting evidence for a benign role. 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: 16267036, 16518693, 15385441, 12531920, 15001988, 19619314, 19491284, 25777348, 26207792, 16931905, 27062684, 32438681). ClinVar contains an entry for this variant (Variation ID: 54329). Based on the evidence outlined above, the variant was classified as likely benign. - |
Hereditary cancer-predisposing syndrome Benign:3
| Likely benign, criteria provided, single submitter | curation | Sema4, Sema4 | Jun 03, 2021 | - - |
| Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Jan 30, 2019 | 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. - |
| Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Mar 02, 2017 | - - |
not provided Benign:2
| Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Sep 04, 2019 | This variant is associated with the following publications: (PMID: 25777348, 19619314, 19491284, 16931905, 16267036, 16518693, 26207792, 27062684, 31131967, 33087888) - |
| Likely benign, criteria provided, single submitter | clinical testing | Quest Diagnostics Nichols Institute San Juan Capistrano | May 09, 2023 | - - |
Hereditary breast ovarian cancer syndrome Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | Invitae | Feb 01, 2024 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
CADD
Benign
DANN
Benign
DEOGEN2
Benign
T;.;.;.;T;T;.
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
LIST_S2
Pathogenic
D;D;D;D;D;D;D
M_CAP
Pathogenic
D
MetaRNN
Benign
T;T;T;T;T;T;T
MetaSVM
Uncertain
D
MutationAssessor
Uncertain
M;M;.;.;.;.;.
MutationTaster
Benign
N;N;N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI
Benign
T
PROVEAN
Benign
N;N;N;N;.;N;N
REVEL
Uncertain
Sift
Uncertain
D;D;D;D;.;D;D
Sift4G
Uncertain
D;D;D;D;.;D;.
Polyphen
B;.;.;B;.;.;.
Vest4
MutPred
Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);.;Loss of loop (P = 0.1242);.;Loss of loop (P = 0.1242);.;
MVP
MPC
0.096
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at