rs587781986

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The ENST00000261584.9(PALB2):​c.72G>T​(p.Leu24Phe) 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. Variant has been reported in ClinVar as Uncertain significance (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L24S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Consequence

PALB2
ENST00000261584.9 missense

Scores

2
10
7

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.389
Variant links:
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]

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.377902).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
PALB2NM_024675.4 linkuse as main transcriptc.72G>T p.Leu24Phe missense_variant 2/13 ENST00000261584.9 NP_078951.2

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
PALB2ENST00000261584.9 linkuse as main transcriptc.72G>T p.Leu24Phe missense_variant 2/131 NM_024675.4 ENSP00000261584 P1

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
30
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsOct 21, 2015The p.L24F variant (also known as c.72G>T), located in coding exon 2 of the PALB2 gene, results from a G to T substitution at nucleotide position 72. The leucine at codon 24 is replaced by phenylalanine, an amino acid with highly similar properties. This variant was not reported in population based cohorts in the following databases: Database of Single Nucleotide Polymorphisms (dbSNP), NHLBI Exome Sequencing Project (ESP), and 1000 Genomes Project. In the ESP, this variant was not observed in 6497 samples (12994 alleles) with coverage at this position. To date, this alteration has been detected with an allele frequency of approximately 0.001% (greater than 70000 alleles tested) in our clinical cohort. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of p.L24F remains unclear. -
Familial cancer of breast Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpOct 22, 2023This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 24 of the PALB2 protein (p.Leu24Phe). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with breast cancer (PMID: 28825143). ClinVar contains an entry for this variant (Variation ID: 1758207). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.92
BayesDel_addAF
Uncertain
0.054
T
BayesDel_noAF
Benign
-0.16
CADD
Uncertain
23
DANN
Uncertain
1.0
DEOGEN2
Uncertain
0.48
T;T
Eigen
Uncertain
0.62
Eigen_PC
Uncertain
0.58
FATHMM_MKL
Uncertain
0.79
D
LIST_S2
Benign
0.84
T;T
M_CAP
Benign
0.050
D
MetaRNN
Benign
0.38
T;T
MetaSVM
Benign
-0.72
T
MutationAssessor
Uncertain
2.8
M;.
MutationTaster
Benign
0.78
N
PrimateAI
Uncertain
0.65
T
PROVEAN
Uncertain
-2.8
D;.
REVEL
Benign
0.20
Sift
Pathogenic
0.0
D;.
Sift4G
Uncertain
0.036
D;.
Polyphen
1.0
D;.
Vest4
0.56
MutPred
0.25
Gain of methylation at K25 (P = 0.034);.;
MVP
0.81
MPC
0.36
ClinPred
0.99
D
GERP RS
4.3
Varity_R
0.59
gMVP
0.33

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.030
Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-23649427; API