NM_000059.4(BRCA2):c.1355T>C (p.Leu452Pro) AND not provided

Germline classification:: Uncertain significance (4 submissions)
Last evaluated:: Mar 20, 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:: RCV000766590.5

Allele description [Variation Report for NM_000059.4(BRCA2):c.1355T>C (p.Leu452Pro)]

NM_000059.4(BRCA2):c.1355T>C (p.Leu452Pro)

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.1355T>C (p.Leu452Pro)

HGVS:

NC_000013.11:g.32332833T>C
NG_012772.3:g.22354T>C
NM_000059.4:c.1355T>CMANE SELECT
NP_000050.2:p.Leu452Pro
NP_000050.3:p.Leu452Pro
LRG_293t1:c.1355T>C
LRG_293:g.22354T>C
LRG_293p1:p.Leu452Pro
NC_000013.10:g.32906970T>C
NM_000059.3:c.1355T>C

Protein change:

L452P

Links:

dbSNP: rs753512842

NCBI 1000 Genomes Browser:

rs753512842

Molecular consequence:

NM_000059.4:c.1355T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Synonyms:: none provided; RECLASSIFIED - ADRA2C POLYMORPHISM; RECLASSIFIED - ADRB1 POLYMORPHISM
Identifiers:: MedGen: C3661900

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000567871	GeneDx	criteria provided, single submitter (GeneDx Variant Classification (06012015))	Uncertain significance (Sep 10, 2015)	germline	clinical testing	Citation Link,
SCV000600475	Quest Diagnostics Nichols Institute San Juan Capistrano	criteria provided, single submitter (Quest Diagnostics criteria)	Uncertain significance (Mar 20, 2024)	unknown	clinical testing	PubMed (3) [See all records that cite these PMIDs] 33471991, 31911673, 26467025
SCV002034339	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute - VKGL Data-share Consensus See additional submitters Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	no assertion criteria provided	Likely benign	germline	clinical testing
SCV002038369	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center - VKGL Data-share Consensus See additional submitters Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	no assertion criteria provided	Likely benign	germline	clinical testing

Help

Summary from all submissions

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

Citations

PubMed

Breast Cancer Risk Genes - Association Analysis in More than 113,000 Women.

Breast Cancer Association Consortium, Dorling L, Carvalho S, Allen J, González-Neira A, Luccarini C, Wahlström C, Pooley KA, Parsons MT, Fortuno C, Wang Q, Bolla MK, Dennis J, Keeman R, Alonso MR, Álvarez N, Herraez B, Fernandez V, Núñez-Torres R, Osorio A, Valcich J, Li M, et al.

N Engl J Med. 2021 Feb 4;384(5):428-439. doi: 10.1056/NEJMoa1913948. Epub 2021 Jan 20.

PubMed [citation]

PMID:: 33471991
PMCID:: PMC7611105

Systematic misclassification of missense variants in BRCA1 and BRCA2 "coldspots".

Dines JN, Shirts BH, Slavin TP, Walsh T, King MC, Fowler DM, Pritchard CC.

Genet Med. 2020 May;22(5):825-830. doi: 10.1038/s41436-019-0740-6. Epub 2020 Jan 8.

PubMed [citation]

PMID:: 31911673
PMCID:: PMC7200594

See all PubMed Citations (3)

Details of each submission

From GeneDx, SCV000567871.4

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

Description

This variant is denoted BRCA2 c.1355T>C at the cDNA level, p.Leu452Pro (L452P) at the protein level, and results in the change of a Leucine to a Proline (CTA>CCA). Using alternate nomenclature, this variant would be defined as BRCA2 1583T>C. This variant has not, to our knowledge, been published in the literature as pathogenic or benign. BRCA2 Leu452Pro was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. Since Leucine and Proline differ in some properties, this is considered a semi-conservative amino acid substitution. BRCA2 Leu452Pro occurs at a position that is not conserved and is not located in a known functional domain (UniProt). In silico analyses predict that this variant is unlikely to alter protein structure or function. Based on currently available information, it is unclear whether BRCA2 Leu452Pro is pathogenic or benign. We consider it to be a variant of uncertain significance.

#	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 Quest Diagnostics Nichols Institute San Juan Capistrano, SCV000600475.4

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

Description

The BRCA2 c.1355T>C (p.Leu452Pro) variant has been reported in the published literature in a large scale breast cancer association study, the variant was observed in an individual with breast cancer as well as in reportedly healthy individuals (PMID: 33471991 (2021), see also LOVD (http://databases.lovd.nl/shared/genes/BRCA2)). Additionally, this variant has been reported to be located in a region of the BRCA2 gene that is tolerant to missense sequence changes (PMID: 31911673 (2020)). The frequency of this variant in the general population, 0.000004 (1/247608 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant.

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

From Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute - VKGL Data-share Consensus, SCV002034339.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	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 Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center - VKGL Data-share Consensus, SCV002038369.1

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

Last Updated: Jan 19, 2025

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