rs376836050

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_007294.4(BRCA1):c.5152+20T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000714 in 1,596,030 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 (★★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 0 hom. )

Consequence

BRCA1
NM_007294.4 intron

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: 1.87

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 -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 17-43063854-A-T is Benign according to our data. Variant chr17-43063854-A-T is described in ClinVar as [Likely_benign]. Clinvar id is 132704.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-43063854-A-T is described in Lovd as [Benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRCA1	NM_007294.4 linkuse as main transcript	c.5152+20T>A		intron_variant		ENST00000357654.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRCA1	ENST00000357654.9 linkuse as main transcript	c.5152+20T>A		intron_variant		1	NM_007294.4	P4	P38398-1

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000159

AC:

AN:

250844

Hom.:

AF XY:

0.000147

AC XY:

AN XY:

135626

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000319

Gnomad ASJ exome

AF:

0.00139

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000970

Gnomad OTH exome

AF:

0.000654

GnomAD4 exome

AF:

0.0000679

AC:

AN:

1443696

Hom.:

Cov.:

AF XY:

0.0000598

AC XY:

AN XY:

719496

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000336

Gnomad4 ASJ exome

AF:

0.000884

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000402

Gnomad4 OTH exome

AF:

0.000251

GnomAD4 genome

AF:

0.000105

AC:

AN:

152334

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000400

Hom.:

Bravo

AF:

0.000140

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jun 20, 2019	Variant summary: BRCA1 c.5152+20T>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 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 0.00016 in 250844 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in BRCA1 causing Hereditary Breast and Ovarian Cancer (0.00016 vs 0.001), allowing no conclusion about variant significance. c.5152+20T>A has been reported in the literature in individuals affected with Hereditary Breast and Ovarian Cancer (Wagner_1999), however in one case the variant was present in both an affected and unaffected family member, which provides supporting evidence for a benign role of this variant, although the age of the family members was not provided (Mohammadi_2009). Co-occurrences with other pathogenic variant(s) have been reported (BRCA2 c.7235insG via UMD; BRCA1 c.68_69delAG from an internal specimen; and BRCA1 c.5152+2T>G from an internal specimen), providing supporting evidence for a benign role. Additionally, the variant has been reported in our lab in a patient as homozygous. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cites the variant as likely benign/benign. Based on the evidence outlined above, the variant was classified as a benign variant. -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 09, 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. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

Breast-ovarian cancer, familial, susceptibility to, 1

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Counsyl	Jun 01, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -

Hereditary cancer-predisposing syndrome

Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 15, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Dec 05, 2013	This alteration is classified as likely benign based on a combination of the following: 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. -

not provided

Benign:1

Likely benign, no assertion criteria provided

clinical testing

Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute

- -

Hereditary breast ovarian cancer syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

Cadd

Benign

Dann

Benign

0.53

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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