16-23635614-T-C

Variant names:

• chr16-23635614-T-C
• rs755129205
• NM_024675.4:c.932A>G

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 4P and 5B. PM1 PM2 BP4_Strong BP6

The NM_024675.4(PALB2):​c.932A>G​(p.Lys311Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,678 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K311E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PALB2 NM_024675.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4 B:1
• Conservation: PhyloP100: 0.0100
• Publications: 4 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: Likely_benign. The variant received -1 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 14 benign, 28 uncertain in NM_024675.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.060788065).
• BP6: Variant 16-23635614-T-C is Benign according to our data. Variant chr16-23635614-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 530210.

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.932A>G	p.Lys311Arg	missense	Exon 4 of 13	NP_078951.2
	PALB2	NM_001407296.1		c.872A>G	p.Lys291Arg	missense	Exon 3 of 12	NP_001394225.1
	PALB2	NM_001407297.1		c.932A>G	p.Lys311Arg	missense	Exon 4 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.932A>G	p.Lys311Arg	missense	Exon 4 of 13	ENSP00000261584.4
	PALB2	ENST00000568219.5	TSL:1	c.47A>G	p.Lys16Arg	missense	Exon 4 of 13	ENSP00000454703.2
	PALB2	ENST00000561514.3	TSL:5	c.938A>G	p.Lys313Arg	missense	Exon 4 of 13	ENSP00000460666.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251154 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.000164

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461678 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727110

African (AFR) AF: 0.00 AC: 0 AN: 33458

American (AMR) AF: 0.0000447 AC: 2 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111880

Other (OTH) AF: 0.0000166 AC: 1 AN: 60388

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Hereditary cancer-predisposing syndrome (2)
-	1	-	Familial cancer of breast (1)
-	1	-	not provided (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.77
CADD	Benign	3.0
DANN	Benign	0.86
DEOGEN2	Benign	0.013	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.068	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.061	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.69	N
PhyloP100		0.010
PrimateAI	Benign	0.21	T
PROVEAN	Benign	-0.19	N
REVEL	Benign	0.037
Sift	Benign	0.031	D
Sift4G	Benign	0.32	T
Polyphen		0.090	B
Vest4		0.15
MutPred		0.19		Loss of ubiquitination at K311 (P = 0.0074)
MVP		0.33
MPC		0.071
ClinPred		0.055	T
GERP RS		2.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.037
gMVP		0.13

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: rs755129205; hg19: chr16-23646935;