13-32317569-A-G

Variant names:

• chr13-32317569-A-G
• rs206120
• NM_000059.4:c.67+1042A>G

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000059.4(BRCA2):​c.67+1042A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.168 in 152,214 control chromosomes in the GnomAD database, including 2,215 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency: Genomes: 𝑓 0.17 (2215 hom., cov: 33)
• Consequence: BRCA2 NM_000059.4 intron
• Clinical Significance: Benign reviewed by expert panel B:2
• Conservation: PhyloP100: -0.0620
• Publications: 7 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: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP6: Variant 13-32317569-A-G is Benign according to our data. Variant chr13-32317569-A-G is described in ClinVar as Benign. ClinVar VariationId is 209607.Status of the report is reviewed_by_expert_panel, 3 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.184 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.67+1042A>G		intron_variant	Intron 2 of 26	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.67+1042A>G		intron_variant	Intron 2 of 26	5	NM_000059.4	ENSP00000369497.3
BRCA2	ENST00000530893.7	c.-303+1046A>G		intron_variant	Intron 2 of 26	1		ENSP00000499438.2
BRCA2	ENST00000614259.2	n.67+1042A>G		intron_variant	Intron 1 of 25	2		ENSP00000506251.1

Frequencies

GnomAD3 genomes AF: 0.168 AC: 25502 AN: 152094 Hom.: 2215 Cov.: 33

Gnomad AFR AF: 0.144

Gnomad AMI AF: 0.260

Gnomad AMR AF: 0.153

Gnomad ASJ AF: 0.131

Gnomad EAS AF: 0.160

Gnomad SAS AF: 0.109

Gnomad FIN AF: 0.193

Gnomad MID AF: 0.218

Gnomad NFE AF: 0.186

Gnomad OTH AF: 0.179

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

GnomAD4 genome AF: 0.168 AC: 25504 AN: 152214 Hom.: 2215 Cov.: 33 AF XY: 0.166 AC XY: 12340 AN XY: 74422

African (AFR) AF: 0.143 AC: 5952 AN: 41532

American (AMR) AF: 0.153 AC: 2341 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.131 AC: 455 AN: 3470

East Asian (EAS) AF: 0.161 AC: 831 AN: 5176

South Asian (SAS) AF: 0.109 AC: 527 AN: 4828

European-Finnish (FIN) AF: 0.193 AC: 2041 AN: 10578

Middle Eastern (MID) AF: 0.228 AC: 67 AN: 294

European-Non Finnish (NFE) AF: 0.186 AC: 12680 AN: 68018

Other (OTH) AF: 0.176 AC: 373 AN: 2116

Alfa AF: 0.155 Hom.: 1025

Bravo AF: 0.168

Asia WGS AF: 0.114 AC: 398 AN: 3476

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: reviewed by expert panel

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 2 Benign:1

Jan 12, 2015

Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA)

Significance: Benign

Review Status: reviewed by expert panel

Collection Method: curation

Class 1 not pathogenic based on frequency >1% in an outbred sampleset. Frequency 0.1853 (Asian), 0.1382 (African), 0.1794 (European), derived from 1000 genomes (2012-04-30).

not provided Benign:1

Jun 14, 2019

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	1.1
DANN	Benign	0.64
PhyloP100		-0.062
Mutation Taster		=100/0	polymorphism (auto)

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: rs206120; hg19: chr13-32891706;