chr2-214781114-T-G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000465.4(BARD1):c.760A>C(p.Ile254Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000028 in 1,428,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. I254K) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

BARD1
NM_000465.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: -0.192

Publications

8 publications found

Variant links:

Genes affected

BARD1 (HGNC:952): (BRCA1 associated RING domain 1) This gene encodes a protein which interacts with the N-terminal region of BRCA1. In addition to its ability to bind BRCA1 in vivo and in vitro, it shares homology with the 2 most conserved regions of BRCA1: the N-terminal RING motif and the C-terminal BRCT domain. The RING motif is a cysteine-rich sequence found in a variety of proteins that regulate cell growth, including the products of tumor suppressor genes and dominant protooncogenes. This protein also contains 3 tandem ankyrin repeats. The BARD1/BRCA1 interaction is disrupted by tumorigenic amino acid substitutions in BRCA1, implying that the formation of a stable complex between these proteins may be an essential aspect of BRCA1 tumor suppression. This protein may be the target of oncogenic mutations in breast or ovarian cancer. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2013]

BARD1 Gene-Disease associations (from GenCC):

breast cancer
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
hereditary breast carcinoma
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen
familial ovarian cancer
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
hereditary nonpolyposis colon cancer
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

BARD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.07434121).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BARD1	NM_000465.4 link	c.760A>C	p.Ile254Leu	missense_variant	Exon 4 of 11	ENST00000260947.9	NP_000456.2	Q99728-1A0AVN2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BARD1	ENST00000260947.9 link	c.760A>C	p.Ile254Leu	missense_variant	Exon 4 of 11	1	NM_000465.4	ENSP00000260947.4		Q99728-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000452

AC:

AN:

221028

AF XY:

0.00000842

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000965

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000280

AC:

AN:

1428630

Hom.:

Cov.:

AF XY:

0.00000424

AC XY:

AN XY:

707954

show subpopulations

African (AFR)

AF:

0.0000314

AC:

AN:

31808

American (AMR)

AF:

0.00

AC:

AN:

38700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24076

East Asian (EAS)

AF:

0.00

AC:

AN:

39444

South Asian (SAS)

AF:

0.00

AC:

AN:

79506

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52318

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5558

European-Non Finnish (NFE)

AF:

0.00000273

AC:

AN:

1098434

Other (OTH)

AF:

0.00

AC:

AN:

58786

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial cancer of breast

Uncertain:2

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces isoleucine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 254 of the BARD1 protein (p.Ile254Leu). This variant is present in population databases (no rsID available, gnomAD 0.001%). This variant has not been reported in the literature in individuals affected with BARD1-related conditions. ClinVar contains an entry for this variant (Variation ID: 245885). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Aug 17, 2022

MGZ Medical Genetics Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:1

May 10, 2021

Color Diagnostics, LLC DBA Color Health

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This missense variant replaces isoleucine with leucine at codon 254 of the BARD1 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with ovarian cancer (PMID: 30441849). This variant has been identified in 1/221028 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Feb 26, 2024

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. -

not provided

Uncertain:1

Nov 20, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with ovarian cancer in published literature (PMID: 30441849); This variant is associated with the following publications: (PMID: 26738429, 30441849) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.59

CADD

Benign

0.85

(source)

DANN

Benign

0.61

DEOGEN2

Benign

0.050

T;.

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.7

FATHMM_MKL

Benign

0.015

LIST_S2

Benign

0.39

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.074

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.060

N;.

PhyloP100

-0.19

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.28

N;.

REVEL

Benign

0.096

Sift

Benign

0.29

T;.

Sift4G

Benign

0.70

T;T

Polyphen

0.0

B;.

Vest4

0.11

MutPred

0.21

Gain of helix (P = 0.0854);.;

MVP

0.55

MPC

0.075

ClinPred

0.10

GERP RS

-12

Varity_R

0.073

gMVP

0.058

Mutation Taster

=88/12

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over