chr16-23636318-T-C

Variant names:

• chr16-23636318-T-C
• rs1555461872
• ENST00000568219.5:c.-658A>G

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_001407304.1(PALB2):​c.-658A>G variant causes a 5 prime UTR premature start codon gain 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. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PALB2 NM_001407304.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 0.0840
• 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: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07998037).
• BP6: Variant 16-23636318-T-C is Benign according to our data. Variant chr16-23636318-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 460935.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001407304.1. 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.228A>G	p.Ile76Met	missense	Exon 4 of 13	NP_078951.2
	PALB2	NM_001407304.1		c.-658A>G		5_prime_UTR_premature_start_codon_gain	Exon 4 of 13	NP_001394233.1
	PALB2	NM_001407305.1		c.-658A>G		5_prime_UTR_premature_start_codon_gain	Exon 5 of 14	NP_001394234.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALB2	ENST00000568219.5	TSL:1	c.-658A>G		5_prime_UTR_premature_start_codon_gain	Exon 4 of 13	ENSP00000454703.2
	PALB2	ENST00000261584.9	TSL:1 MANE Select	c.228A>G	p.Ile76Met	missense	Exon 4 of 13	ENSP00000261584.4
	PALB2	ENST00000568219.5	TSL:1	c.-658A>G		5_prime_UTR	Exon 4 of 13	ENSP00000454703.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	4.2
DANN	Benign	0.95
DEOGEN2	Benign	0.085	T
Eigen	Benign	-0.77
Eigen_PC	Benign	-0.84
FATHMM_MKL	Benign	0.097	N
LIST_S2	Benign	0.68	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.080	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.1	L
PhyloP100		0.084
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-0.18	N
REVEL	Benign	0.025
Sift	Benign	0.073	T
Sift4G	Benign	0.069	T
Polyphen		0.40	B
Vest4		0.13
MutPred		0.22		Gain of catalytic residue at I76 (P = 0.011)
MVP		0.44
MPC		0.085
ClinPred		0.089	T
GERP RS		0.51
Varity_R		0.089
gMVP		0.013

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: rs1555461872; hg19: chr16-23647639;