13-32346875-C-T

Variant names:

• chr13-32346875-C-T
• rs80358925
• NM_000059.4:c.6986C>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM1 PP3

The NM_000059.4(BRCA2):​c.6986C>T​(p.Pro2329Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000808 in 1,609,490 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. P2329T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: BRCA2 NM_000059.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:10 B:2
• Conservation: PhyloP100: 5.19
• Publications: 21 publications found

Genes affected

BRCA2 (HGNC:1101): (BRCA2 DNA repair associated) Inherited mutations in BRCA1 and this gene, BRCA2, confer increased lifetime risk of developing breast or ovarian cancer. Both BRCA1 and BRCA2 are involved in maintenance of genome stability, specifically the homologous recombination pathway for double-strand DNA repair. The largest exon in both genes is exon 11, which harbors the most important and frequent mutations in breast cancer patients. The BRCA2 gene was found on chromosome 13q12.3 in human. The BRCA2 protein contains several copies of a 70 aa motif called the BRC motif, and these motifs mediate binding to the RAD51 recombinase which functions in DNA repair. BRCA2 is considered a tumor suppressor gene, as tumors with BRCA2 mutations generally exhibit loss of heterozygosity (LOH) of the wild-type allele. [provided by RefSeq, May 2020]

BRCA2 Gene-Disease associations (from GenCC):

• breast-ovarian cancer, familial, susceptibility to, 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen
• Fanconi anemia complementation group D1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, G2P
• pancreatic cancer, susceptibility to, 2

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• sarcoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• hereditary breast ovarian cancer syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• medulloblastoma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 5 benign, 31 uncertain in NM_000059.4
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.789

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000059.4. 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
	BRCA2	NM_000059.4	MANE Select	c.6986C>T	p.Pro2329Leu	missense	Exon 13 of 27	NP_000050.3
	BRCA2	NM_001432077.1		c.6986C>T	p.Pro2329Leu	missense	Exon 13 of 27	NP_001419006.1
	BRCA2	NM_001406720.1		c.6986C>T	p.Pro2329Leu	missense	Exon 13 of 27	NP_001393649.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRCA2	ENST00000380152.8	TSL:5 MANE Select	c.6986C>T	p.Pro2329Leu	missense	Exon 13 of 27	ENSP00000369497.3
	BRCA2	ENST00000544455.6	TSL:1	c.6986C>T	p.Pro2329Leu	missense	Exon 13 of 27	ENSP00000439902.1
	BRCA2	ENST00000530893.7	TSL:1	c.6617C>T	p.Pro2206Leu	missense	Exon 13 of 27	ENSP00000499438.2

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151902 Hom.: 0 Cov.: 32

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000295

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000400 AC: 1 AN: 250074 AF XY: 0.00000739

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: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000755 AC: 11 AN: 1457588 Hom.: 0 Cov.: 29 AF XY: 0.00000965 AC XY: 7 AN XY: 725128

African (AFR) AF: 0.00 AC: 0 AN: 33408

American (AMR) AF: 0.00 AC: 0 AN: 44600

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26048

East Asian (EAS) AF: 0.0000253 AC: 1 AN: 39486

South Asian (SAS) AF: 0.00 AC: 0 AN: 85710

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52640

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5730

European-Non Finnish (NFE) AF: 0.00000721 AC: 8 AN: 1109768

Other (OTH) AF: 0.0000332 AC: 2 AN: 60198

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151902 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74170

African (AFR) AF: 0.00 AC: 0 AN: 41404

American (AMR) AF: 0.00 AC: 0 AN: 15254

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10548

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000295 AC: 2 AN: 67906

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.000116 Hom.: 0

Bravo AF: 0.0000264

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	2	1	Breast-ovarian cancer, familial, susceptibility to, 2 (3)
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	2	-	not provided (2)
-	1	-	BRCA2-related cancer predisposition (1)
-	1	-	Breast and/or ovarian cancer (1)
-	-	1	Hereditary breast ovarian cancer syndrome (1)
-	1	-	Malignant tumor of breast (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Pathogenic	27
DANN	Pathogenic	1.0
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.94	D
M_CAP	Pathogenic	0.34	D
MetaRNN	Pathogenic	0.79	D
MetaSVM	Pathogenic	0.87	D
PhyloP100		5.2
PrimateAI	Benign	0.47	T
PROVEAN	Uncertain	-2.6	D
REVEL	Pathogenic	0.74
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.53
MVP		0.97
MPC		0.17
ClinPred		0.98	D
GERP RS		5.0
gMVP		0.59
Mutation Taster		=43/57	disease causing

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

Other links and lift over

dbSNP: rs80358925; hg19: chr13-32921012;