NM_000059.4(BRCA2):c.9117G>A (p.Pro3039=) AND Hereditary breast ovarian cancer syndrome

Germline classification:: Pathogenic (4 submissions)
Last evaluated:: Jan 29, 2024
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000045725.32

Allele description [Variation Report for NM_000059.4(BRCA2):c.9117G>A (p.Pro3039=)]

NM_000059.4(BRCA2):c.9117G>A (p.Pro3039=)

Gene:

BRCA2:BRCA2 DNA repair associated [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

13q13.1

Genomic location:

Preferred name:

NM_000059.4(BRCA2):c.9117G>A (p.Pro3039=)

Other names:

P3039P; p.P3039P:CCG>CCA; NM_000059.4(BRCA2):c.9117G>A; p.Pro3039=

HGVS:

NC_000013.11:g.32379913G>A
NG_012772.3:g.69434G>A
NM_000059.4:c.9117G>AMANE SELECT
NP_000050.2:p.Pro3039=
NP_000050.3:p.Pro3039=
LRG_293t1:c.9117G>A
LRG_293:g.69434G>A
LRG_293p1:p.Pro3039=
NC_000013.10:g.32954050G>A
NM_000059.3:c.9117G>A
U43746.1:n.9345G>A
p.P3039P

Nucleotide change:

9345G>A

Links:

dbSNP: rs28897756

NCBI 1000 Genomes Browser:

rs28897756

Molecular consequence:

NM_000059.4:c.9117G>A - synonymous variant - [Sequence Ontology: SO:0001819]

Condition(s)

Name:: Hereditary breast ovarian cancer syndrome
Synonyms:: Hereditary breast and ovarian cancer syndrome; Hereditary breast and ovarian cancer; Hereditary breast and ovarian cancer syndrome (HBOC); See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0003582; MeSH: D061325; MedGen: C0677776; Orphanet: 145

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000073738	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Jan 29, 2024)	germline	clinical testing	PubMed (15) [See all records that cite these PMIDs] 10638982, 17011978, 17148771, 22923021, 26026974, 17924331, 21990134, 17576681, 9536098, 22505045, 22632462, 23035815, 23451180, 25382762, 28492532
SCV000494420	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	criteria provided, single submitter (LabCorp Variant Classification Summary - May 2015)	Pathogenic (Oct 8, 2020)	germline	clinical testing	PubMed (12) [See all records that cite these PMIDs] 21990134, 17924331, 11802209, 22505045, 23451180, 22632462, 22923021, 17011978, 24249303, 10638982, 28477318, 27000661 Citation Link,
SCV000587988	Research Molecular Genetics Laboratory, Women's College Hospital, University of Toronto - The Canadian Open Genetics Repository (COGR)	no assertion criteria provided	Pathogenic (Jan 31, 2014)	germline	research
SCV004848273	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	criteria provided, single submitter (ACMG Guidelines, 2015)	Pathogenic (Jun 30, 2022)	germline	clinical testing	PubMed (9) [See all records that cite these PMIDs] 10638982, 22632462, 22505045, 23035815, 23451180, 26026974, 27000661, 29084914, 25741868

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	not provided	not provided	not provided	not provided	not provided	research
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Population BRCA1 and BRCA2 mutation frequencies and cancer penetrances: a kin-cohort study in Ontario, Canada.

Risch HA, McLaughlin JR, Cole DE, Rosen B, Bradley L, Fan I, Tang J, Li S, Zhang S, Shaw PA, Narod SA.

J Natl Cancer Inst. 2006 Dec 6;98(23):1694-706.

PubMed [citation]

PMID:: 17148771

Aberrant 5' splice sites in human disease genes: mutation pattern, nucleotide structure and comparison of computational tools that predict their utilization.

Buratti E, Chivers M, Královicová J, Romano M, Baralle M, Krainer AR, Vorechovsky I.

Nucleic Acids Res. 2007;35(13):4250-63. Epub 2007 Jun 18.

PubMed [citation]

PMID:: 17576681
PMCID:: PMC1934990

See all PubMed Citations (21)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000073738.15

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (15)

Description

This sequence change affects codon 3039 of the BRCA2 mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the BRCA2 protein. RNA analysis indicates that this variant induces altered splicing and may result in an absent or disrupted protein product. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has been observed in individual(s) with breast, ovarian, or prostate cancer (PMID: 10638982, 17011978, 17148771, 22923021, 23035815, 26026974). This variant is also known as 9345G>A. ClinVar contains an entry for this variant (Variation ID: 38215). Based on a multifactorial likelihood algorithm using genetic, in silico, and/or statistical data, this variant has been determined to have a high probability of being pathogenic (PMID: 17924331, 21990134). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that this variant results in skipping of exon 23 and introduces a premature termination codon (PMID: 22505045, 22632462, 23035815, 23451180, 25382762; Invitae). The resulting mRNA is expected to undergo nonsense-mediated decay. For these reasons, this variant has been classified as Pathogenic.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Women's Health and Genetics/Laboratory Corporation of America, LabCorp, SCV000494420.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (12)

Description

Variant summary: BRCA2 c.9117G>A (p.Pro3039Pro) alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. Several computational tools predict a significant impact on normal splicing: Two predict that the variant abolishes a 5' splicing donor site. Multiple publications report experimental evidence that this variant affects mRNA splicing (e.g. Bonatti_2006, Acedo_2012, Houdayer_2012, Colombo_2013). The variant allele was found at a frequency of 4e-06 in 248378 control chromosomes. c.9117G>A has been reported in the literature in many individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (e.g. Peelen_2000, Meindl_2002, Bonatti_2006, Novakovic_2012, Nakamura_2013, Corman_2016, Barrios_2017). These data indicate that the variant is very likely to be associated with disease. 17 other ClinVar submitters, including an expert panel (evaluation after 2014) cite the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Research Molecular Genetics Laboratory, Women's College Hospital, University of Toronto - The Canadian Open Genetics Repository (COGR), SCV000587988.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	research	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine, SCV004848273.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (9)

Description

The p.Pro3039Pro (c.9117G>A) variant in BRCA2 has been reported in at least 16 individuals with BRCA2-related cancer (Peelen 2000 PMID: 10638982, Houdayer 2012 PMID: 22505045, Willems-Jones 2012 PMID: 23035815, de Juan 2015 PMID: 26026974, Corman 2016 PMID: 27000661, Labidi-Galy 2018 PMID: 29084914). It has also been identified in 1/111660 European chromosomes by gnomAD (http://gnomad.broadinstitute.org); however, this frequency is low enough to be consistent with the frequency of hereditary breast and ovarian cancer (HBOC) in the general population. This variant has also been identified in ClinVar (Variation ID: 38215). This variant is located in the last base of the exon, which is part of the 5’ splice region. Computational tools predict a splicing impact, and both in vitro studies and testing of patient RNA have shown that this variant results in exon skipping, which is predicted to lead to an absent or truncated protein (Peelen 2000 PMID: 10638982, Acedo 2012 PMID: 22632462, Houdayer 2012 PMID: 22505045, Colombo 2013 PMID: 23451180). Loss of function of the BRCA2 gene is an established disease mechanism in autosomal dominant hereditary breast and ovarian cancer syndrome (HBOC). Another variant, c.9117G>T, resulting in the same synonymous change and predicted splicing impact has also been identified in individuals with BRCA2-related cancers. In summary, this variant meets criteria to be classified as pathogenic for autosomal dominant HBOC. ACMG/AMP Criteria applied: PS3, PM2, PS4.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Nov 24, 2024

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