chr17-43091935-G-A

Position:

chr17-43091935-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_007294.4(BRCA1):c.3596C>T(p.Ala1199Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000173 in 1,613,958 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. A1199P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

BRCA1
NM_007294.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:8

Conservation

PhyloP100: 0.651

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 Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.09672788).

BP6

Variant 17-43091935-G-A is Benign according to our data. Variant chr17-43091935-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 142428.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=6, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRCA1	NM_007294.4 linkuse as main transcript	c.3596C>T	p.Ala1199Val	missense_variant	10/23	ENST00000357654.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRCA1	ENST00000357654.9 linkuse as main transcript	c.3596C>T	p.Ala1199Val	missense_variant	10/23	1	NM_007294.4	P4	P38398-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000757

AC:

AN:

250934

Hom.:

AF XY:

0.0000811

AC XY:

AN XY:

135676

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000983

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1461786

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727176

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000630

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000378

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:8

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 06, 2018	This variant is denoted BRCA1 c.3596C>T at the cDNA level, p.Ala1199Val (A1199V) at the protein level, and results in the change of an Alanine to a Valine (GCT>GTT). Using alternate nomenclature, this variant has been previously published as BRCA1 3715C>T. This variant has been identified in at least one breast cancer case, but has also been detected in unaffected individuals (Suter 2004, Carney 2010). BRCA1 Ala1199Val was observed at an allele frequency of 0.1% (19/18,798) in individuals of East Asian ancestry in large population cohorts (Lek 2016). Since Alanine and Valine share similar properties, this is considered a conservative amino acid substitution. BRCA1 Ala1199Val is not located in a known functional domain. In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect. Based on currently available evidence, it is unclear whether BRCA1 Ala1199Val is pathogenic or benign. We consider it to be a variant of uncertain significance. -
Likely benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Sep 18, 2018	- -

Hereditary cancer-predisposing syndrome

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jan 13, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	May 27, 2017	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	curation	University of Washington Department of Laboratory Medicine, University of Washington	Mar 23, 2023	Missense variant in a coldspot region where missense variants are very unlikely to be pathogenic (PMID:31911673). -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

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

May 21, 2024

Variant summary: BRCA1 c.3596C>T (p.Ala1199Val) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 8e-05 in 251572 control chromosomes, predominantly at a frequency of 0.00098 within the East Asian subpopulation in the gnomAD database. This frequency is not significantly higher than estimated for a pathogenic variant in BRCA1 causing Hereditary Breast And Ovarian Cancer Syndrome (8e-05 vs 0.001), allowing no conclusion about variant significance. c.3596C>T has been reported in the literature in individuals affected with Breast and/or Ovarian Cancer (example, Carney_2010, Suter_2004, Luo_2022). 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 (example, Bouwman_2020). These results showed no damaging effect of this variant on homologous recombination DNA repair (HRR). These results showed no damaging effect of this variant. The following publications have been ascertained in the context of this evaluation (PMID: 14973102, 21218378, 32546644, 35300142). ClinVar contains an entry for this variant (Variation ID: 142428). Based on the evidence outlined above, the variant was classified as likely benign. -

Familial cancer of breast

Benign:1

Likely benign, no assertion criteria provided

literature only

Center for Precision Medicine, Meizhou People's Hospital

- -

Hereditary breast ovarian cancer syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 30, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.17

CADD

Benign

8.4

DANN

Benign

0.97

DEOGEN2

Uncertain

0.43

T;.;.;.

Eigen

Benign

-0.77

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.79

T;T;T;T

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.097

T;T;T;T

MetaSVM

Benign

-0.60

MutationAssessor

Uncertain

2.5

M;M;.;.

MutationTaster

Benign

1.0

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

PrimateAI

Benign

0.27

PROVEAN

Uncertain

-2.5

D;D;D;D

REVEL

Uncertain

0.35

Sift

Uncertain

0.017

D;D;D;D

Sift4G

Benign

0.19

T;T;T;D

Polyphen

0.43

B;.;.;B

Vest4

0.33

MutPred

0.29

Gain of MoRF binding (P = 0.1108);Gain of MoRF binding (P = 0.1108);.;Gain of MoRF binding (P = 0.1108);

MVP

0.67

MPC

0.10

ClinPred

0.049

GERP RS

0.78

Varity_R

0.042

gMVP

0.082

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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