Genetic Variant BARD1:p.Leu239Gln (chr2-214781158-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 3P and 5B. PM1PP3BS1BS2_Supporting

The NM_000465.4(BARD1):c.716T>A(p.Leu239Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000577 in 1,577,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/24 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. L239L) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000058 ( 0 hom. )

Consequence

BARD1
NM_000465.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:18B:2

Conservation

PhyloP100: -0.116

Publications

13 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):

BARD1-related cancer predisposition
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
breast cancer
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
hereditary breast carcinoma
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

BARD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 4 benign, 41 uncertain in NM_000465.4

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BS1

Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.0000575 (82/1425466) while in subpopulation MID AF = 0.00144 (8/5558). AF 95% confidence interval is 0.000716. There are 0 homozygotes in GnomAdExome4. There are 48 alleles in the male GnomAdExome4 subpopulation. Median coverage is 34. This position passed quality control check.

BS2

High AC in GnomAd4 at 9 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000465.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BARD1	NM_000465.4	MANE Select	c.716T>A	p.Leu239Gln	missense	Exon 4 of 11	NP_000456.2	Q99728-1
BARD1	NM_001282543.2		c.659T>A	p.Leu220Gln	missense	Exon 3 of 10	NP_001269472.1	Q99728-2
BARD1	NM_001282545.2		c.215+15903T>A		intron	N/A	NP_001269474.1	C9IYG1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BARD1	ENST00000260947.9	TSL:1 MANE Select	c.716T>A	p.Leu239Gln	missense	Exon 4 of 11	ENSP00000260947.4	Q99728-1
BARD1	ENST00000617164.5	TSL:1	c.659T>A	p.Leu220Gln	missense	Exon 3 of 10	ENSP00000480470.1	Q99728-2
BARD1	ENST00000613706.5	TSL:1	c.716T>A	p.Leu239Gln	missense	Exon 4 of 11	ENSP00000484976.2	A0A087X2H0

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152202

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000101

AC:

AN:

217412

AF XY:

0.000102

show subpopulations

Gnomad AFR exome

AF:

0.0000645

Gnomad AMR exome

AF:

0.0000375

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000174

Gnomad OTH exome

AF:

0.000198

GnomAD4 exome

AF:

0.0000575

AC:

AN:

1425466

Hom.:

Cov.:

AF XY:

0.0000679

AC XY:

AN XY:

706924

show subpopulations

African (AFR)

AF:

0.0000636

AC:

AN:

31446

American (AMR)

AF:

0.0000552

AC:

AN:

36212

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23860

East Asian (EAS)

AF:

0.00

AC:

AN:

39490

South Asian (SAS)

AF:

0.0000128

AC:

AN:

78302

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52208

Middle Eastern (MID)

AF:

0.00144

AC:

AN:

5558

European-Non Finnish (NFE)

AF:

0.0000573

AC:

AN:

1099714

Other (OTH)

AF:

0.000102

AC:

AN:

58676

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

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:

0.0000591

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74486

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41576

American (AMR)

AF:

0.0000654

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68018

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

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:

0.0000641

Hom.:

Bravo

AF:

0.0000416

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000107

AC:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Familial cancer of breast (8)

Hereditary cancer-predisposing syndrome (5)

not specified (3)

not provided (2)

BARD1-related disorder (1)

Breast and/or ovarian cancer (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.061

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.50

CADD

Benign

(source)

DANN

Benign

0.26

DEOGEN2

Benign

0.080

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.053

LIST_S2

Benign

0.55

M_CAP

Benign

0.014

MetaRNN

Benign

0.067

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.2

PhyloP100

-0.12

PrimateAI

Benign

0.23

PROVEAN

Benign

0.020

REVEL

Benign

0.071

Sift

Benign

0.61

Sift4G

Benign

0.51

Polyphen

0.014

Vest4

0.14

MVP

0.56

MPC

0.079

ClinPred

0.018

GERP RS

-4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.066

gMVP

0.32

Mutation Taster

=91/9

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.57

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.57

Position offset: -1

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over