NM_024675.4:c.3549C>A

Variant names:

• chr16-23603471-G-T
• rs118203998
• NM_024675.4:c.3549C>A

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PP1_Strong PVS1 PM3_Strong

This summary comes from the ClinGen Evidence Repository: The c.3549C>A (p.Tyr1183Ter) variant in PALB2 is a nonsense variant that may cause a premature stop codon that is predicted to escape nonsense mediated decay, however it is a truncation of a functionally important region (removes amino acids 1183-1186) in a gene where loss-of-function is an established disease mechanism. This variant, or another variant leading to the same protein truncation, has been detected in three individuals with autosomal recessive FANCN. Of those individuals, three were compound heterozygous for the variant and a pathogenic or likely pathogenic variant and three of those were confirmed in trans by parental testing (co-occurring variants: c.2257C>T (p.Arg753Ter); c.2962C>T (p.Gln988Ter); c.3116delA (p.Asn1039Ilefs*2): PMID 17200671). The variant has been reported to segregate with breast and/or pancreatic cancer in 15 affected members from 6 families (Invitae; Ambry Genetics). This variant is non-functional in multiple different protein assays (PMID 31757951, PMID 31636395); however due to a lack of positive missense controls with known clinical impact, these protein assays do not meet the requirements for use by the HBOP VCEP. In summary, this variant meets the criteria to be classified as pathogenic for autosomal dominant hereditary breast and pancreatic cancer and autosomal recessive FANCN based on the ACMG/AMP criteria applied, as specified by the HBOP VCEP. (PVS1, PP1_Strong, PM3_Strong) LINK:https://erepo.genome.network/evrepo/ui/classification/CA288488/MONDO:0016419/020

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PALB2 NM_024675.4 stop_gained
• Clinical Significance: Pathogenic reviewed by expert panel P:26
• Conservation: PhyloP100: 0.163
• Publications: 52 publications found

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]

PALB2 Gene-Disease associations (from GenCC):

• hereditary breast carcinoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• PALB2-related cancer predisposition

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Fanconi anemia complementation group N

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, G2P
• pancreatic cancer, susceptibility to, 3

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PVS1: For more information check the summary or visit ClinGen Evidence Repository.
• PM3: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024675.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALB2	NM_024675.4	MANE Select	c.3549C>A	p.Tyr1183*	stop_gained	Exon 13 of 13	NP_078951.2
	PALB2	NM_001407296.1		c.3489C>A	p.Tyr1163*	stop_gained	Exon 12 of 12	NP_001394225.1
	PALB2	NM_001407297.1		c.3477C>A	p.Tyr1159*	stop_gained	Exon 12 of 12	NP_001394226.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALB2	ENST00000261584.9	TSL:1 MANE Select	c.3549C>A	p.Tyr1183*	stop_gained	Exon 13 of 13	ENSP00000261584.4	Q86YC2
	PALB2	ENST00000568219.5	TSL:1	c.2664C>A	p.Tyr888*	stop_gained	Exon 13 of 13	ENSP00000454703.2	H3BN63
	PALB2	ENST00000561514.3	TSL:5	c.3555C>A	p.Tyr1185*	stop_gained	Exon 13 of 13	ENSP00000460666.3	A0AA52I2C1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251420 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1459920 Hom.: 0 Cov.: 31 AF XY: 0.00000551 AC XY: 4 AN XY: 726434

African (AFR) AF: 0.00 AC: 0 AN: 33426

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 86226

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1110240

Other (OTH) AF: 0.00 AC: 0 AN: 60324

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000480 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
10	-	-	not provided (10)
5	-	-	Familial cancer of breast (5)
3	-	-	Hereditary cancer-predisposing syndrome (3)
2	-	-	Familial cancer of breast;C1835817:Fanconi anemia complementation group N;C3150547:Pancreatic cancer, susceptibility to, 3 (2)
1	-	-	Breast-ovarian cancer, familial, susceptibility to, 1 (1)
1	-	-	Fanconi anemia complementation group N;C3150547:Pancreatic cancer, susceptibility to, 3;C5830615:Breast-ovarian cancer, familial, susceptibility to, 5 (1)
1	-	-	Hereditary breast ovarian cancer syndrome (1)
1	-	-	Hereditary cancer-predisposing syndrome;C1835817:Fanconi anemia complementation group N;C3150547:Pancreatic cancer, susceptibility to, 3;C5830615:Breast-ovarian cancer, familial, susceptibility to, 5 (1)
1	-	-	PALB2-related cancer predisposition (1)
1	-	-	PALB2-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	30
DANN	Uncertain	0.98
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.54
FATHMM_MKL	Benign	0.12	N
PhyloP100		0.16
Vest4		0.75
GERP RS		-0.82
Mutation Taster		=20/180	disease causing (ClinVar)

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: rs118203998; hg19: chr16-23614792; COSMIC: COSV104552896; COSMIC: COSV104552896;