rs587780208
Variant summary
Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong
The NM_024675.4(PALB2):c.2078A>T(p.His693Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,614,112 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_024675.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -2 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152220Hom.: 0 Cov.: 32
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461892Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1AN XY: 727248
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152220Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74370
ClinVar
Submissions by phenotype
not provided Uncertain:1
The variant has not been reported in the published literature. The frequency of this variant in the general population, 0.0000066 (1/152220 chromosomes, http://gnomad.broadinstitute.org), is uninformative in assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
Hereditary cancer-predisposing syndrome Uncertain:1
The p.H693L variant (also known as c.2078A>T), located in coding exon 5 of the PALB2 gene, results from an A to T substitution at nucleotide position 2078. The histidine at codon 693 is replaced by leucine, an amino acid with similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Familial cancer of breast Uncertain:1
This sequence change replaces histidine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 693 of the PALB2 protein (p.His693Leu). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with hereditary breast and/or ovarian cancer (PMID: 35610400). ClinVar contains an entry for this variant (Variation ID: 820667). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt PALB2 protein function with a negative predictive value of 80%. 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:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at