16-23630344-G-A

Position:

• chr16-23630344-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP6_Very_Strong BS2

The ENST00000261584.9(PALB2):​c.1810C>T​(p.Leu604=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000309 in 1,614,164 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L604L) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0019 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00015 (1 hom.)
• Consequence: PALB2 ENST00000261584.9 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:14
• Conservation: PhyloP100: 0.347

Genes affected

PALB2 (HGNC:26144): (partner and localizer of BRCA2) This gene encodes a protein that may function in tumor suppression. This protein binds to and colocalizes with the breast cancer 2 early onset protein (BRCA2) in nuclear foci and likely permits the stable intranuclear localization and accumulation of BRCA2. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP6: Variant 16-23630344-G-A is Benign according to our data. Variant chr16-23630344-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 126625.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-23630344-G-A is described in Lovd as [Likely_benign]. Variant chr16-23630344-G-A is described in Lovd as [Benign].
• BS2: High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PALB2	NM_024675.4	c.1810C>T	p.Leu604=	synonymous_variant	5/13	ENST00000261584.9	NP_078951.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PALB2	ENST00000261584.9	c.1810C>T	p.Leu604=	synonymous_variant	5/13	1	NM_024675.4	ENSP00000261584	P1

Frequencies

GnomAD3 genomes AF: 0.00186 AC: 283 AN: 152194 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00661

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00143

GnomAD3 exomes AF: 0.000406 AC: 102 AN: 251376 Hom.: 0 AF XY: 0.000250 AC XY: 34 AN XY: 135872

Gnomad AFR exome AF: 0.00597

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000148 AC: 216 AN: 1461852 Hom.: 1 Cov.: 33 AF XY: 0.000116 AC XY: 84 AN XY: 727218

Gnomad4 AFR exome AF: 0.00544

Gnomad4 AMR exome AF: 0.000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.000348

GnomAD4 genome AF: 0.00186 AC: 283 AN: 152312 Hom.: 2 Cov.: 32 AF XY: 0.00172 AC XY: 128 AN XY: 74480

Gnomad4 AFR AF: 0.00659

Gnomad4 AMR AF: 0.000262

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000978 Hom.: 1

Bravo AF: 0.00195

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:14

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Jan 04, 2022	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 16, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Sep 05, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Oct 05, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2024	PALB2: BP1, BP4, BS2 -

Hereditary cancer-predisposing syndrome Benign:3

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Sep 22, 2015	- -
Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Apr 20, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Apr 09, 2020	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Familial cancer of breast Benign:2

Likely benign, no assertion criteria provided	curation	Leiden Open Variation Database	May 13, 2019	Curators: Marc Tischkowitz, Arleen D. Auerbach. Submitter to LOVD: Marc Tischkowitz. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -

Breast and/or ovarian cancer Benign:1

Likely benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

May 26, 2021

- -

Familial ovarian cancer Benign:1

Likely benign, no assertion criteria provided

clinical testing

Department of Pathology and Laboratory Medicine, Sinai Health System

-

The PALB2 p.Leu604= variant was identified in 1 of 558 proband chromosomes (frequency: 0.002) from individuals or families with breast cancer and was not identified in 520 control chromosomes from healthy individuals (Zheng 2012). The variant was also identified in the following databases: dbSNP (ID: rs144015319) as "With other allele", ClinVar (classified as benign by Invitae, GeneDx, Color Genomics; as likely benign by Ambry Genetics and Quest Diagnostics Nichols Institute San Juan Capistrano), Clinvitae, and in LOVD 3.0 (1x probably does not affect function). The variant was not identified in Cosmic, or Zhejiang University databases. The variant was identified in control databases in 151 of 277136 chromosomes at a frequency of 0.001 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). It was observed in the following populations: African in 145 of 24032 chromosomes (freq: 0.01), Latino in 5 of 34418 chromosomes (freq: 0.0002), European in 1 of 126630 chromosomes (freq: 0.00001); it was not observed in the “Other”, Ashkenazi Jewish, East Asian, Finnish, and South Asian populations. The p.Leu604= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

Hereditary breast ovarian cancer syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

National Health Laboratory Service, Universitas Academic Hospital and University of the Free State

Apr 19, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	6.4
DANN	Benign	0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.24		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.24		Position offset: -14

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs144015319; hg19: chr16-23641665;