NM_024675.4(PALB2):c.908T>C (p.Leu303Pro) AND Familial cancer of breast

Germline classification:: Conflicting interpretations of pathogenicity (2 submissions)
Last evaluated:: Jan 24, 2024
Review status:: criteria provided, conflicting classifications

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:: RCV000822728.12

Allele description [Variation Report for NM_024675.4(PALB2):c.908T>C (p.Leu303Pro)]

NM_024675.4(PALB2):c.908T>C (p.Leu303Pro)

Gene:

PALB2:partner and localizer of BRCA2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

16p12.2

Genomic location:

Preferred name:

NM_024675.4(PALB2):c.908T>C (p.Leu303Pro)

HGVS:

NC_000016.10:g.23635638A>G
NG_007406.1:g.10720T>C
NM_024675.4:c.908T>CMANE SELECT
NP_078951.2:p.Leu303Pro
NP_078951.2:p.Leu303Pro
LRG_308t1:c.908T>C
LRG_308:g.10720T>C
LRG_308p1:p.Leu303Pro
NC_000016.9:g.23646959A>G
NM_024675.3:c.908T>C

Protein change:

L303P

Links:

dbSNP: rs774057025

NCBI 1000 Genomes Browser:

rs774057025

Molecular consequence:

NM_024675.4:c.908T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Familial cancer of breast
Synonyms:: Breast cancer, familial; Hereditary breast cancer
Identifiers:: MONDO: MONDO:0016419; MedGen: C0346153; OMIM: 114480

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000963543	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 24, 2024)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV004018673	Myriad Genetics, Inc.	criteria provided, single submitter (Myriad Autosomal Dominant, Autosomal Recessive and X-Linked Classification Criteria (2023))	Likely benign (Jun 12, 2023)	unknown	clinical testing	PubMed (1) [See all records that cite this PMID] Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000963543

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 24, 2024)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV004018673

Myriad Genetics, Inc.

criteria provided, single submitter

(Myriad Autosomal Dominant, Autosomal Recessive and X-Linked Classification Criteria (2023))

Likely benign
(Jun 12, 2023)

unknown

clinical testing

PubMed (1)
[See all records that cite this PMID]

Citation Link

Help

Summary from all submissions

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

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Development and validation of a new algorithm for the reclassification of genetic variants identified in the BRCA1 and BRCA2 genes.

Pruss D, Morris B, Hughes E, Eggington JM, Esterling L, Robinson BS, van Kan A, Fernandes PH, Roa BB, Gutin A, Wenstrup RJ, Bowles KR.

Breast Cancer Res Treat. 2014 Aug;147(1):119-32. doi: 10.1007/s10549-014-3065-9. Epub 2014 Aug 2.

PubMed [citation]

PMID:: 25085752

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000963543.6

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

Description

This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 303 of the PALB2 protein (p.Leu303Pro). This variant is present in population databases (rs774057025, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with PALB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 231978). 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 PALB2 protein function with a negative predictive value of 80%. 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.

#	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 Myriad Genetics, Inc., SCV004018673.1

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

Description

This variant is considered likely benign. This variant is strongly associated with less severe personal and family histories of cancer, typical for individuals without pathogenic variants in this gene [PMID: 25085752].

#	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

Last Updated: Sep 29, 2024

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