chr16-23641122-C-G

Variant names:

• chr16-23641122-C-G
• rs760609798
• NM_024675.4:c.36G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_024675.4(PALB2):​c.36G>C​(p.Glu12Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E12Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PALB2 NM_024675.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 0.370
• Publications: 1 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: ClinGen, Ambry Genetics
• Fanconi anemia complementation group N

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

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• familial ovarian cancer

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary nonpolyposis colon cancer

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 12 benign, 36 uncertain in NM_024675.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2138232).

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALB2	NM_024675.4	MANE Select	c.36G>C	p.Glu12Asp	missense	Exon 1 of 13	NP_078951.2
	PALB2	NM_001407296.1		c.36G>C	p.Glu12Asp	missense	Exon 1 of 12	NP_001394225.1
	PALB2	NM_001407297.1		c.36G>C	p.Glu12Asp	missense	Exon 1 of 12	NP_001394226.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALB2	ENST00000261584.9	TSL:1 MANE Select	c.36G>C	p.Glu12Asp	missense	Exon 1 of 13	ENSP00000261584.4
	PALB2	ENST00000568219.5	TSL:1	c.-838+5G>C		splice_region intron	N/A	ENSP00000454703.2
	PALB2	ENST00000713774.1		c.36G>C	p.Glu12Asp	missense	Exon 1 of 11	ENSP00000519076.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	1	-	Familial cancer of breast (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T
Eigen	Benign	-0.0020
Eigen_PC	Benign	-0.026
FATHMM_MKL	Benign	0.43	N
LIST_S2	Benign	0.68	T
M_CAP	Benign	0.0044	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		0.37
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.079
Sift	Benign	0.18	T
Sift4G	Benign	0.14	T
Polyphen		0.91	P
Vest4		0.23
MutPred		0.079		Loss of methylation at K14 (P = 0.1092)
MVP		0.46
MPC		0.26
ClinPred		0.92	D
GERP RS		1.4
PromoterAI		0.13	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.069
gMVP		0.0087

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs760609798; hg19: chr16-23652443;