chr13-32394734-T-C

Variant names:

• chr13-32394734-T-C
• rs28897758
• NM_000059.4:c.9302T>C

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Very_Strong

The NM_000059.4(BRCA2):​c.9302T>C​(p.Leu3101Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L3101V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRCA2 NM_000059.4 missense
• Clinical Significance: Likely pathogenic reviewed by expert panel P:3 U:3
• Conservation: PhyloP100: 5.17
• Publications: 22 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: Pathogenic. The variant received 16 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 11 benign, 21 uncertain in NM_000059.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr13-32394734-T-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 38230.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.932
• PP5: Variant 13-32394734-T-C is Pathogenic according to our data. Variant chr13-32394734-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 216263.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.9302T>C	p.Leu3101Pro	missense_variant	Exon 25 of 27	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.9302T>C	p.Leu3101Pro	missense_variant	Exon 25 of 27	5	NM_000059.4	ENSP00000369497.3
BRCA2	ENST00000530893.7	c.8933T>C	p.Leu2978Pro	missense_variant	Exon 25 of 27	1		ENSP00000499438.2
BRCA2	ENST00000614259.2	n.*1360T>C		non_coding_transcript_exon_variant	Exon 24 of 26	2		ENSP00000506251.1
BRCA2	ENST00000614259.2	n.*1360T>C		3_prime_UTR_variant	Exon 24 of 26	2		ENSP00000506251.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3 Uncertain:3

Revision: reviewed by expert panel

Submissions by phenotype

not specified Uncertain:2

Sep 22, 2021

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change does not appear to have been previously described in patients with BRCA2-related disorders and has also not been described in the population databases such as ExAC and gnomAD (dbSNP rs28897758). The p.Leu3101Pro change affects a moderately conserved amino acid residue located in a domain of the BRCA2 protein that is known to be functional. The p.Leu3101Pro substitution appears to be deleterious using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). Due to this insufficient evidence and the lack of functional studies, the clinical significance of the p.Leu3101Pro change remains unknown at this time.

Aug 16, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: BRCA2 c.9302T>C (p.Leu3101Pro) results in a non-conservative amino acid change located in the OB3 domain (IPR015188) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 250968 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. The variant, c.9302T>C has been reported in an ovarian cancer tumor, however germline or somatic status was not determined (Ellison_2015). No experimental evidence demonstrating its impact on protein function has been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance.

BRCA2-related cancer predisposition Pathogenic:1

Aug 18, 2025

ClinGen ENIGMA BRCA1 and BRCA2 Variant Curation Expert Panel, ClinGen

Significance: Likely pathogenic

Review Status: reviewed by expert panel

Collection Method: curation

The c.9302T>C variant in BRCA2 is a missense variant predicted to cause substitution of Leucine by Proline at amino acid 3101 (p.(Leu3101Pro)). This variant is absent from gnomAD v2.1 (exomes only, non-cancer subset, read depth ≥25) and gnomAD v3.1 (non-cancer subset, read depth ≥25) (PM2_Supporting met). Reported by three calibrated studies to exhibit protein function similar to pathogenic control variants (PMIDs: 38417439, 32444794, 39779857) (PS3 met). This BRCA2 missense variant is within a key functional domain and the computational predictor BayesDel (noAF) gives a score of 0.32, above the recommended threshold of 0.30 for prediction of impact on BRCA2 function via protein change. A SpliceAI score of 0 predicts no impact on splicing (score threshold <0.10) (PP3 met). Multifactorial likelihood ratio analysis using clinically calibrated data produced a combined LR for this variant of 2.19 (based on Family History LR=2.19), within the thresholds for supporting evidence towards pathogenicity (LR >2.08 & ≤4.3) (PP4 met; PMID: 31853058). In summary, this variant meets the criteria to be classified as a Likely pathogenic variant for BRCA2-related cancer predisposition based on the ACMG/AMP criteria applied as specified by the ENIGMA BRCA1/2 VCEP (PM2_Supporting, PS3, PP3, PP4).

not provided Pathogenic:1

Feb 16, 2024

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate a damaging effect: defective homology-directed repair activity and sensitivity to PARP inhibitors (PMID: 35736817, 32444794); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Also known as 9530T>C; This variant is associated with the following publications: (PMID: 25859162, 29884841, 31853058, 12228710, 32776218, 35382848, 33471991, 32444794, 35736817)

Hereditary cancer-predisposing syndrome Pathogenic:1

Jul 31, 2025

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.L3101P variant (also known as c.9302T>C), located in coding exon 24 of the BRCA2 gene, results from a T to C substitution at nucleotide position 9302. The leucine at codon 3101 is replaced by proline, an amino acid with similar properties. In one study, this variant was observed in 1/68 ovarian tumor samples and classified by the authors as a variant of unknown significance; it is unknown if this was a germline or somatic variant (Ellison G et al. BMC Clin Pathol 2015; 15:5). This alteration has also been reported as a germline variant in at least one individual with ovarian cancer (Jasiewicz A et al. Hered Cancer Clin Pract. 2022 Apr;20(1):12). This alteration was non-functional in a homology directed DNA repair assay (Hu C et al. Am J Hum Genet. 2024 Mar;111(3):584-593) and was reported as pathogenic based on sensitivity to PARP inhibitors in a high-throughput in vitro assay performed in a human colorectal adenoma cell line (Ikegami M et al. Nat Commun, 2020 05;11:2573). In addition, a saturation genome editing-based study using a haploid cell-survival assay demonstrates that this nucleotide substitution may be non-functional (Huang H et al. Nature. 2025 Feb;638(8050):528-537). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic.

Hereditary breast ovarian cancer syndrome Uncertain:1

Jun 08, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 3101 of the BRCA2 protein (p.Leu3101Pro). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with ovarian cancer (PMID: 32776218). ClinVar contains an entry for this variant (Variation ID: 216263). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BRCA2 protein function with a negative predictive value of 95%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0	.;.
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.0	.;.
M_CAP	Pathogenic	0.46	D
MetaRNN	Pathogenic	0.93	D;D
MetaSVM	Uncertain	0.67	D
MutationAssessor	Benign	0.0	.;.
PhyloP100		5.2
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-2.0	N;N
REVEL	Pathogenic	0.79
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0050	D;D
Vest4		0.84
ClinPred		0.96	D
GERP RS		5.9
gMVP		0.86
Mutation Taster		=30/70	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: rs28897758; hg19: chr13-32968871;