NM_024675.4(PALB2):c.1001A>G (p.Tyr334Cys) AND Familial cancer of breast

Germline classification:: Conflicting interpretations of pathogenicity (5 submissions)
Last evaluated:: Feb 1, 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:: RCV000114449.34

Allele description [Variation Report for NM_024675.4(PALB2):c.1001A>G (p.Tyr334Cys)]

NM_024675.4(PALB2):c.1001A>G (p.Tyr334Cys)

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.1001A>G (p.Tyr334Cys)

Other names:

p.Y334C:TAC>TGC

HGVS:

NC_000016.10:g.23635545T>C
NG_007406.1:g.10813A>G
NM_024675.4:c.1001A>GMANE SELECT
NP_078951.2:p.Tyr334Cys
NP_078951.2:p.Tyr334Cys
LRG_308t1:c.1001A>G
LRG_308:g.10813A>G
LRG_308p1:p.Tyr334Cys
NC_000016.9:g.23646866T>C
NM_024675.3:c.1001A>G
Q86YC2:p.Tyr334Cys
p.Y334C

Protein change:

Y334C

Links:

UniProtKB: Q86YC2#VAR_066363; dbSNP: rs200620434

NCBI 1000 Genomes Browser:

rs200620434

Molecular consequence:

NM_024675.4:c.1001A>G - 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
SCV000166636	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Likely benign (Feb 1, 2024)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000611877	University of Washington Department of Laboratory Medicine, University of Washington	criteria provided, single submitter (Tsai GJ et al. (Genet Med 2018))	Benign (Mar 28, 2018)	germline	research	PubMed (1) [See all records that cite this PMID]
SCV001140046	Mendelics	criteria provided, single submitter (Mendelics Assertion Criteria 2019)	Benign (Aug 22, 2023)	germline	clinical testing	Citation Link,
SCV001193051	Leiden Open Variation Database	no assertion criteria provided	Uncertain significance (May 13, 2019)	germline	curation	PubMed (5) [See all records that cite these PMIDs] 20852946, 22241545, 22692731, 24556926, 25186627
SCV001370405	Centre for Mendelian Genomics, University Medical Centre Ljubljana	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Jan 1, 2016)	unknown	clinical testing	PubMed (1) [See all records that cite this PMID]

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Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	not provided	1	not provided	not provided	yes	research, curation
not provided	unknown	yes	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	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

Outcomes of 92 patient-driven family studies for reclassification of variants of uncertain significance.

Tsai GJ, Rañola JMO, Smith C, Garrett LT, Bergquist T, Casadei S, Bowen DJ, Shirts BH.

Genet Med. 2019 Jun;21(6):1435-1442. doi: 10.1038/s41436-018-0335-7. Epub 2018 Oct 30.

PubMed [citation]

PMID:: 30374176

See all PubMed Citations (8)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000166636.14

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

#	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 University of Washington Department of Laboratory Medicine, University of Washington, SCV000611877.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	yes	research	PubMed (1)

Description

The PALB2 variant designated as NM_024675.3:c.1001A>G (p.Tyr334Cys) is classified as benign. This variant is present in 1 in 2200 individuals with European ancestry (exac.broadinstitute.org). It is classified as likely benign in the LOVD PALB2 database (https://databases.lovd.nl/shared/variants/PALB2 curated by Tischowitz & Auerbach). Computer programs predict that this variant is likely to be tolerated. This genomic position is not highly conserved. Bayesian analysis integrating all of this data (Tavtigian et al, 2018, PMID:29300386) gives a <0.1% probability of pathogenicity, which is consistent with a classification of benign. This variant is not predicted to alter PALB2 function or modify cancer risk. A modest (less than 2 fold) increase in cancer risk due to this variant cannot be entirely excluded. This reclassification analysis was performed in conjunction with the family studies project as part of the University of Washington Find My Variant Study.

#	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	1	not provided

From Mendelics, SCV001140046.2

#	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	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Leiden Open Variation Database, SCV001193051.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	curation	PubMed (5)

Description

Curators: Marc Tischkowitz, Arleen D. Auerbach. Submitter to LOVD: Marc Tischkowitz.

#	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 Centre for Mendelian Genomics, University Medical Centre Ljubljana, SCV001370405.2

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

Description

This variant was classified as: Uncertain significance.

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

Last Updated: Sep 29, 2024

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