rs876658777

Variant names:

• chr2-214797052-ATTAC-A
• rs876658777
• NM_000465.4:c.215+5_215+8delGTAA

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PS3 PM2 PP3 PP5

The NM_000465.4(BARD1):​c.215+5_215+8delGTAA variant causes a splice region, intron change. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). ClinVar reports functional evidence for this variant: "SCV000274461: RNA studies have demonstrated that this alteration results in abnormal splicing in the set of samples tested (Ambry internal data).".

• Frequency: Genomes: not found (cov: 32)
• Consequence: BARD1 NM_000465.4 splice_region, intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3 U:2
• Conservation: PhyloP100: 4.84
• Publications: 1 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):

• 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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000274461: RNA studies have demonstrated that this alteration results in abnormal splicing in the set of samples tested (Ambry internal data).
• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 2-214797052-ATTAC-A is Pathogenic according to our data. Variant chr2-214797052-ATTAC-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 230793.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BARD1	NM_000465.4	MANE Select	c.215+5_215+8delGTAA		splice_region intron	N/A	NP_000456.2	Q99728-1
	BARD1	NM_001282543.2		c.159-4611_159-4608delGTAA		intron	N/A	NP_001269472.1	Q99728-2
	BARD1	NM_001282545.2		c.215+5_215+8delGTAA		splice_region intron	N/A	NP_001269474.1	C9IYG1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BARD1	ENST00000260947.9	TSL:1 MANE Select	c.215+5_215+8delGTAA		splice_region intron	N/A	ENSP00000260947.4	Q99728-1
	BARD1	ENST00000617164.5	TSL:1	c.159-4611_159-4608delGTAA		intron	N/A	ENSP00000480470.1	Q99728-2
	BARD1	ENST00000613706.5	TSL:1	c.215+5_215+8delGTAA		splice_region intron	N/A	ENSP00000484976.2	A0A087X2H0

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
2	1	-	Hereditary cancer-predisposing syndrome (3)
-	1	-	Familial cancer of breast (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.8

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.77		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.77		Position offset: 9

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

Other links and lift over

dbSNP: rs876658777; hg19: chr2-215661776;