17-43092115-C-A

Position:

chr17-43092115-C-A

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_ModerateBP6_Very_Strong

The ENST00000357654.9(BRCA1):c.3416G>T(p.Ser1139Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,461,586 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 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. S1139R) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

BRCA1
ENST00000357654.9 missense

Scores

Clinical Significance

Benign reviewed by expert panel U:6B:8

Conservation

PhyloP100: -1.19

Variant links:

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]

BRCA1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -10 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.25714988).

BP6

Variant 17-43092115-C-A is Benign according to our data. Variant chr17-43092115-C-A is described in ClinVar as [Benign]. Clinvar id is 54873.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BRCA1	NM_007294.4 linkuse as main transcript	c.3416G>T	p.Ser1139Ile	missense_variant	10/23	ENST00000357654.9	NP_009225.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BRCA1	ENST00000357654.9 linkuse as main transcript	c.3416G>T	p.Ser1139Ile	missense_variant	10/23	1	NM_007294.4	ENSP00000350283	P4	P38398-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251078

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135756

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1461586

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727106

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000334

Hom.:

Bravo

AF:

0.0000302

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Uncertain:6Benign:8

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 1

Uncertain:2Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Michigan Medical Genetics Laboratories, University of Michigan	Nov 03, 2014	- -
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 = 0.000012 -
Uncertain significance, no assertion criteria provided	clinical testing	Breast Cancer Information Core (BIC) (BRCA1)	Nov 25, 2004	- -
Benign, no assertion criteria provided	clinical testing	BRCAlab, Lund University	Mar 02, 2020	- -

not specified

Uncertain:1Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 02, 2023	Variant summary: BRCA1 c.3416G>T (p.Ser1139Ile) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 1.2e-05 in 1455818 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in BRCA1 causing Hereditary Breast And Ovarian Cancer Syndrome (1.2e-05 vs 0.001), allowing no conclusion about variant significance. c.3416G>T has been reported in the literature in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (e.g., Borg_2010, Meyer_2003, Bhai_2021), however without strong evidence for causality (e.g., lack of co-segregation data). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. At least one publication reports experimental evidence evaluating an impact on protein function (e.g., Bouwman_2020). The results of this study showed no damaging effect of this variant on homology directed repair (HDR) activity by illustrating no impairment of the variant to complement BRCA1-deficient mouse embryonic stem cells in homologous recombination DNA repair (HRR) using a direct GFP HRR assay as well as cisplatin and olaparib sensitivity assays. HDR assays qualify as a recognized gold standard on the basis of updated guidance provided by the ClinGen Sequence Variant Interpretation (SVI) working group (PMID: 31892348). ClinGen SVI now recognizes benign functional evidence as sufficient for categorization as likely benign (PMID: 29300386). The following publications have been ascertained in the context of this evaluation (PMID: 20104584, 12938098, 34326862, 32546644, 16267036, 34396183). Nine submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Multiple submitters reported the variant with conflicting assessments (benign/likely benign, n = 6; uncertain significance, n = 3). Based on the evidence outlined above, the variant was classified as likely benign. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 11, 2020	DNA sequence analysis of the BRCA1 gene demonstrated a sequence change, c.3416G>T, in exon 10 that results in an amino acid change, p.Ser1139Ile. This sequence change does not appear to have been previously described in patients with BRCA1-related disorders and has been described in the gnomAD database in three individuals (dbSNP rs80357228). The p.Ser1139Ile change affects a moderately conserved amino acid residue located in a domain of the BRCA1 protein that is known to be functional. The p.Ser1139Ile substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). Due to the lack of functional studies, the clinical significance of the p.Ser1139Ile change remains unknown at this time. -
Benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	May 03, 2023	The frequency of this variant in the general population, 0.000026 (3/113598 chromosomes, http://gnomad.broadinstitute.org), is uninformative in assessment of its pathogenicity. In the published literature, the variant has been reported in individuals affected with breast and/or ovarian cancer (PMIDs: 12938098 (2003), 16267036 (2005), 20104584 (2010), and 33471991 (2021); LOVD3 Shared (https://databases.lovd.nl/shared/)). This variant was also reported in healthy cancer-free individuals (FLOSSIES, (https://whi.color.com/), PMID: 33471991 (2021); LOVD3 Shared (https://databases.lovd.nl/shared/)). Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 17, 2020	Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 20104584, 12938098, 23704879, 31131967, 16267036, 10923033) -

Hereditary breast ovarian cancer syndrome

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 17, 2023	- -
Uncertain significance, no assertion criteria provided	clinical testing	Cancer Genetics and Genomics Laboratory, British Columbia Cancer Agency	Apr 14, 2016	- -

Hereditary cancer-predisposing syndrome

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Feb 22, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Jun 07, 2021	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. -

BRCA1-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 05, 2023

The BRCA1 c.3416G>T variant is predicted to result in the amino acid substitution p.Ser1139Ile. This variant was reported in at least one patient with breast cancer, however, no other information was available (for example, supple. Table 2 in Borg et al. 2010. PubMed ID: 20104584). Of note, this variant occurs within a region of the BRCA1 gene that is predicted to be tolerant to variation (Table 2, Dines et al. 2020. PubMed ID: 31911673). This variant is reported in 0.0026% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/17-41244132-C-A). This variant is classified as benign, or uncertain variant in ClinVar (https://preview.ncbi.nlm.nih.gov/clinvar/variation/54873/). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.096

BayesDel_addAF

Benign

0.0082

BayesDel_noAF

Benign

-0.12

CADD

Benign

9.8

DANN

Benign

0.96

DEOGEN2

Uncertain

0.58

D;.;.;.

Eigen

Benign

-0.86

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.050

LIST_S2

Benign

0.80

T;T;T;T

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.26

T;T;T;T

MetaSVM

Benign

-0.46

MutationAssessor

Uncertain

2.2

M;M;.;.

MutationTaster

Benign

1.0

N;N;N;N;N;N;N;N;N;N;N;N;N;N

PrimateAI

Benign

0.28

PROVEAN

Uncertain

-4.2

D;D;D;D

REVEL

Uncertain

0.51

Sift

Uncertain

0.0060

D;D;D;D

Sift4G

Uncertain

0.015

D;D;D;D

Polyphen

0.39

B;.;.;B

Vest4

0.36

MVP

0.46

MPC

0.14

ClinPred

0.22

GERP RS

-5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.088

gMVP

0.18

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over