rs144856889

Positions:

• chr2-214792315-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_000465.4(BARD1):​c.346C>T​(p.His116Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000249 in 1,613,432 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00027 (0 hom., cov: 30)
  • Exomes 𝑓: 0.00025 (0 hom.)
• Consequence: BARD1 NM_000465.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5 B:8
• Conservation: PhyloP100: 0.522

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]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0076081753).
• BP6: Variant 2-214792315-G-A is Benign according to our data. Variant chr2-214792315-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 142156.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=4, Likely_benign=6, Benign=1}.
• BS2: High AC in GnomAd4 at 41 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BARD1	NM_000465.4	c.346C>T	p.His116Tyr	missense_variant	3/11	ENST00000260947.9	NP_000456.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BARD1	ENST00000260947.9	c.346C>T	p.His116Tyr	missense_variant	3/11	1	NM_000465.4	ENSP00000260947.4

Frequencies

GnomAD3 genomes AF: 0.000270 AC: 41 AN: 152014 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00151

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000368

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000291 AC: 73 AN: 251012 Hom.: 0 AF XY: 0.000265 AC XY: 36 AN XY: 135670

Gnomad AFR exome AF: 0.0000616

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00185

Gnomad NFE exome AF: 0.000273

Gnomad OTH exome AF: 0.000164

GnomAD4 exome AF: 0.000246 AC: 360 AN: 1461300 Hom.: 0 Cov.: 32 AF XY: 0.000234 AC XY: 170 AN XY: 726930

Gnomad4 AFR exome AF: 0.0000598

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00217

Gnomad4 NFE exome AF: 0.000209

Gnomad4 OTH exome AF: 0.000166

GnomAD4 genome AF: 0.000270 AC: 41 AN: 152132 Hom.: 0 Cov.: 30 AF XY: 0.000309 AC XY: 23 AN XY: 74386

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00151

Gnomad4 NFE AF: 0.000368

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000158 Hom.: 0

Bravo AF: 0.0000945

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.000387 AC: 47

EpiCase AF: 0.0000546

EpiControl AF: 0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5 Benign:8

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Familial cancer of breast Uncertain:3 Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 24, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Apr 17, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Feb 24, 2023	This variant is considered likely benign. This variant is strongly associated with less severe personal and family histories of cancer, typical for individuals without pathogenic variants in this gene [PMID: 25085752]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -

Hereditary cancer-predisposing syndrome Benign:3

Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Dec 30, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Mar 29, 2019	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	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 01, 2016	- -

not specified Uncertain:1 Benign:1

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 23, 2019	Variant summary: BARD1 c.346C>T (p.His116Tyr) results in a 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 0.00031 in 282296 control chromosomes, predominantly at a frequency of 0.00033 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 1.32 fold of the estimated maximal expected allele frequency for a pathogenic variant in BARD1 causing Hereditary Breast and Ovarian Cancer phenotype (0.00025), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Non-Finnish European origin. c.346C>T has been reported in the literature in individuals affected with Hereditary Breast and Ovarian Cancer, Colorectal Cancer, and pancreatic ductal adenocarcinoma (Lee_2015, Mu_2016, Tung_2015, Young_2016, Yurgelun_2017, Chaffee_2017). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast and Ovarian Cancer. At least one publication reports experimental evidence evaluating an impact on protein function. These results showed no damaging effect of this variant (Lee_2015). Five ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cites the variant three times as likely benign and twice as uncertain significance. Based on the evidence outlined above, the variant was classified as benign. -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -

BARD1-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 24, 2024

The BARD1 c.346C>T variant is predicted to result in the amino acid substitution p.His116Tyr. This variant has been reported in patients with various cancers, and classified as a variant of uncertain significance (Lee et al. 2015. PubMed ID: 26350354; Yurgelun et al. 2017. PubMed ID: 28135145). However, no further information was provided regarding the segregation of this variant with disease in families or evidence of its pathogenicity. This variant is reported in 0.17% of alleles in individuals of European (Finnish) descent in gnomAD. This variant has been reported with conflicting interpretations in ClinVar: variant of uncertain significance (3), likely benign (6) and benign (1) (https://www.ncbi.nlm.nih.gov/clinvar/variation/405796/). Although we suspect this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jul 02, 2021

In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 23056176, 26350354, 26787654, 27720647, 28873162, 28726808, 28135145) -

Malignant tumor of breast Benign:1

Likely benign, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

-

The BARD1 p.His116Tyr variant was identified in 1 of 604 proband chromosomes (frequency: 0.002) from individuals with pancreatic cancer (Chaffee 2018). The variant was identified in dbSNP (rs144856889) as “with other allele” and ClinVar (classified as likely benign by Invitae, Ambry Genetics, Integrated Genetics and Color; and as uncertain significance by Counsyl and GeneDx). The variant was identified in control databases in 88 of 282,296 chromosomes at a frequency of 0.0003 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Finnish in 42 of 25,062 chromosomes (freq: 0.002), Other in 3 of 7196 chromosomes (freq: 0.0004), and European in 42 of 128,918 chromosomes (freq: 0.0003), while the variant was not observed in the African, Latino, Ashkenazi Jewish, East Asian or South Asian populations. In vitro expression of the variant did not alter BARD1 protein levels and there was no observed effect on homology directed repair activity (Lee 2015). The p.His116 residue is conserved in in mammals but not in more distantly related organisms however computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.085
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	10
DANN	Benign	0.87
DEOGEN2	Benign	0.14	T;.;.;.
Eigen	Benign	-0.89
Eigen_PC	Benign	-0.88
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.67	T;T;T;T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.0076	T;T;T;T
MetaSVM	Benign	-0.94	T
MutationAssessor	Benign	2.0	M;.;.;M
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.7	N;.;.;.
REVEL	Benign	0.054
Sift	Benign	0.13	T;.;.;.
Sift4G	Uncertain	0.013	D;T;D;D
Polyphen		0.0060	B;.;.;.
Vest4		0.26
MVP		0.75
MPC		0.087
ClinPred		0.031	T
GERP RS		1.2
Varity_R		0.093
gMVP		0.24

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

Other links and lift over

dbSNP: rs144856889; hg19: chr2-215657039;