17-43047694-G-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM1BP4_ModerateBP6

The NM_007294.4(BRCA1):c.5416C>G(p.Pro1806Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000929 in 1,613,996 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P1806L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

BRCA1
NM_007294.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:6

Conservation

PhyloP100: 0.311

Publications

17 publications found

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 Gene-Disease associations (from GenCC):

breast-ovarian cancer, familial, susceptibility to, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
Fanconi anemia, complementation group S
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics
pancreatic cancer, susceptibility to, 4
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
hereditary breast ovarian cancer syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Fanconi anemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BRCA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PM1

In a hotspot region, there are 9 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 18 benign, 75 uncertain in NM_007294.4

BP4

Computational evidence support a benign effect (MetaRNN=0.17208552).

BP6

Variant 17-43047694-G-C is Benign according to our data. Variant chr17-43047694-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 55570.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA1	NM_007294.4 link	c.5416C>G	p.Pro1806Ala	missense_variant	Exon 22 of 23	ENST00000357654.9	NP_009225.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA1	ENST00000357654.9 link	c.5416C>G	p.Pro1806Ala	missense_variant	Exon 22 of 23	1	NM_007294.4	ENSP00000350283.3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

251484

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727240

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000894

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74312

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41410

American (AMR)

AF:

0.0000655

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68024

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Benign:3

Jan 07, 2025

Color Diagnostics, LLC DBA Color Health

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 14, 2018

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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.

Dec 11, 2024

Molecular Diagnostics Laboratory, Catalan Institute of Oncology

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

BS3, BP4 c.5416C>G, located in exon 22 (23 according to BIC nomenclature) of the BRCA1 gene, is predicted to result in the substitution of proline by alanine at codon 1806, p.(Pro1806Ala). This position affects a (potentially) clinically important functional domain and, moreover, the SpliceAI algorithm predicts no significant impact on splicing (BP4). This variant is found in 3/236948 alleles at a frequency of 0.001% in the gnomAD v2.1.1 database, non-cancer dataset. Reported by two calibrated studies to affect protein function similar to benign control variants (PMIDs:30209399, 30765603) (BS3). In a case-control study, this variant was present in 1 out of 53461 healthy controls and none of 60466 breast cancer patients (PMID: 33471991). This variant has been reported in the ClinVar database (4x likely benign, 2x uncertain significance), in the LOVD (6x unclassified) and in BRCA Exchange database (not yet classified by the expert panel). Based on currently available information, the variant c.5416C>G should be considered a likely benign variant, according to ClinGen ENIGMA BRCA1 and BRCA2 Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for BRCA1 Version 1.0.0.

Breast-ovarian cancer, familial, susceptibility to, 1

Uncertain:2

Nov 14, 1997

Breast Cancer Information Core (BIC) (BRCA1)

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

Jan 11, 2024

All of Us Research Program, National Institutes of Health

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense variant replaces proline with alanine at codon 1806 of the BRCA1 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). Functional studies have reported that this variant does not impact BRCA1 activity in a haploid cell proliferation assay, transcription activation assays, and in protease sensitivity and phospho-peptide binding assays (PMID: 10811118, 15172985, 17308087, 20516115, 30209399). This variant has been detected in a breast cancer case-control meta-analysis in 0/60466 cases and 1/53461 unaffected individuals (PMID: 33471991; Leiden Open Variation Database DB-ID BRCA1_000472). This variant has been identified in 3/251484 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Although there is a suspicion that this variant may not be associated with disease, additional clinical studies are necessary to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

not specified

Benign:1

May 09, 2025

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: BRCA1 c.5416C>G (p.Pro1806Ala) results in a non-conservative amino acid change located in the BRCT domain (IPR001357) of the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant allele was found at a frequency of 1.2e-05 in 251484 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.5416C>G has been reported in the literature in an individual affected with Hereditary Breast and Ovarian Cancer (Shattuck-Eidens_1997). This report does not provide unequivocal conclusions about association of the variant with Hereditary Breast and Ovarian Cancer. Various functional studies carried out to assess a number of different properties of the variant protein including, transcriptional activity, protein folding, phosphopeptide-binding and thermodynamic stability, all demonstrated the variant to cause no defect and be similar to the wild-type (Carvalho_2007, Coyne_2004, Hayes_2000, Lee_2010, Rowling_2010). The following publications have been ascertained in the context of this evaluation (PMID: 17308087, 15004537, 30765603, 10811118, 20516115, 20378548, 9333265). ClinVar contains an entry for this variant (Variation ID: 55570). Based on the evidence outlined above, the variant was classified as likely benign.

not provided

Benign:1

Oct 14, 2022

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Hereditary breast ovarian cancer syndrome

Benign:1

Jan 11, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.0039

BayesDel_noAF

Uncertain

-0.050

CADD

Benign

1.5

(source)

DANN

Benign

0.23

DEOGEN2

Benign

0.0

.;T;.;T;T;T;.;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.039

LIST_S2

Benign

0.73

T;T;T;T;T;T;T;T

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.17

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

0.0

.;.;.;.;.;.;.;.

PhyloP100

0.31

PrimateAI

Benign

0.30

PROVEAN

Benign

-2.3

N;N;.;.;.;.;N;N

REVEL

Uncertain

0.47

Sift

Benign

0.35

T;T;.;.;.;.;T;T

Sift4G

Benign

0.56

T;T;T;T;T;T;T;T

Vest4

0.31

ClinPred

0.034

GERP RS

1.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.056

gMVP

0.22

Mutation Taster

=56/44

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over