2-214745724-G-C

Variant names:

• chr2-214745724-G-C
• rs730881421
• NM_000465.4:c.1808C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000465.4(BARD1):​c.1808C>G​(p.Thr603Arg) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,748 control chromosomes in the GnomAD database, with no homozygous occurrence. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T603K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: BARD1 NM_000465.4 missense, splice_region
• Scores: Splicing: ADA: 0.04500
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.76
• Publications: 3 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BARD1	NM_000465.4	MANE Select	c.1808C>G	p.Thr603Arg	missense splice_region	Exon 8 of 11	NP_000456.2
	BARD1	NM_001282543.2		c.1751C>G	p.Thr584Arg	missense splice_region	Exon 7 of 10	NP_001269472.1
	BARD1	NM_001282545.2		c.455C>G	p.Thr152Arg	missense splice_region	Exon 4 of 7	NP_001269474.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BARD1	ENST00000260947.9	TSL:1 MANE Select	c.1808C>G	p.Thr603Arg	missense splice_region	Exon 8 of 11	ENSP00000260947.4
	BARD1	ENST00000617164.5	TSL:1	c.1751C>G	p.Thr584Arg	missense splice_region	Exon 7 of 10	ENSP00000480470.1
	BARD1	ENST00000613706.5	TSL:1	c.1400C>G	p.Thr467Arg	missense splice_region	Exon 8 of 11	ENSP00000484976.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251106 AF XY: 0.00

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: 0.00000882

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461748 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727172

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111946

Other (OTH) AF: 0.00 AC: 0 AN: 60388

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Benign	21
DANN	Uncertain	0.97
DEOGEN2	Benign	0.14	T
Eigen	Benign	0.092
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.066	D
MetaRNN	Uncertain	0.43	T
MetaSVM	Benign	-0.51	T
MutationAssessor	Benign	1.7	L
PhyloP100		2.8
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.9	N
REVEL	Uncertain	0.56
Sift	Benign	0.10	T
Sift4G	Benign	0.14	T
Polyphen		0.15	B
Vest4		0.49
MutPred		0.69		Gain of helix (P = 0.0325)
MVP		0.78
MPC		0.12
ClinPred		0.39	T
GERP RS		4.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.21
gMVP		0.70
Mutation Taster		=75/25	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.045
dbscSNV1_RF	Benign	0.29
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs730881421; hg19: chr2-215610448;