Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6_Very_StrongBP7
The NM_007294.4(BRCA1):c.3636A>G(p.Ser1212=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000644 in 1,614,066 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★★). Synonymous variant affecting the same amino acid position (i.e. S1212S) has been classified as Likely benign.
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]
BP4 - Multiple lines of computational evidence suggest no impact on gene or gene product (conservation, evolutionary, splicing impact, etc.)
Computational evidence support a benign effect (BayesDel_noAF=-0.51).
BP6
?
BP6 - Reputable source recently reports variant as benign, but the evidence is not available to the laboratory to perform an independent evaluation
Variant 17-43091895-T-C is Benign according to our data. Variant chr17-43091895-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 136544.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr17-43091895-T-C is described in Lovd as [Likely_benign].
BP7
?
BP7 - A synonymous (silent) variant for which splicing prediction algorithms predict no impact to the splice consensus sequence nor the creation of a new splice site AND the nucleotide is not highly conserved
Synonymous conserved (PhyloP=-0.79 with no splicing effect.
Likely benign, criteria provided, single submitter
clinical testing
ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories
Jun 11, 2021
- -
Benign, criteria provided, single submitter
clinical testing
Quest Diagnostics Nichols Institute San Juan Capistrano
May 26, 2023
- -
Uncertain significance, no assertion criteria provided
clinical testing
Department of Pathology and Laboratory Medicine, Sinai Health System
-
- -
not specified Benign:2
Benign, criteria provided, single submitter
clinical testing
GeneDx
Feb 24, 2014
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. -
Likely benign, criteria provided, single submitter
clinical testing
Women's Health and Genetics/Laboratory Corporation of America, LabCorp
Feb 22, 2019
Variant summary: The variant, BRCA1 c.3636A>G alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 8.1e-06 in 246060 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. The variant, c.3636A>G has been reported in the literature in individuals affected with breast and ovarian cancer (Judkins_2005, Anczukow_2008). These reports however do not provide unequivocal conclusions about association of the variant with Hereditary Breast and Ovarian Cancer. In our internal database, co-occurrence with another pathogenic variant has been reported (CHEK2 c.1368dupA, p.Glu457fsX33) for this variant, providing supporting evidence for a benign role. A functional study using minigene assay reports that it was one of the variants that did not dramatically alter splicing through disruption of an ESE (Anczukow_2008). The exact extent of functional impairment was not provided in the study. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and have classified the variant as likely benign. Based on the evidence outlined above, the variant was classified likely benign. -
Breast-ovarian cancer, familial, susceptibility to, 1 Benign:2
Likely benign, reviewed by expert panel
curation
Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA)
Jun 29, 2017
Synonymous substitution variant, with low bioinformatic likelihood to result in a splicing aberration (Splicing prior probability 0.02; http://priors.hci.utah.edu/PRIORS/). -
Likely benign, criteria provided, single submitter
clinical testing
All of Us Research Program, National Institutes of Health
Dec 13, 2023
- -
Hereditary cancer-predisposing syndrome Benign:2
Likely benign, criteria provided, single submitter
clinical testing
Color Diagnostics, LLC DBA Color Health
Aug 15, 2016
- -
Likely benign, criteria provided, single submitter
clinical testing
Ambry Genetics
Oct 08, 2014
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. -
Hereditary breast ovarian cancer syndrome Benign:1
Likely benign, criteria provided, single submitter