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LYFE SCIENCES
Project: HERA
NM_024675.3:c.104T>C
p.Leu35Pro  ·  PALB2
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Classification rationale
1

The PALB2 c.104T>C (p.Leu35Pro) variant has not been observed in COSMIC and has been reported in ClinVar with an overall expert-panel classification of uncertain significance, alongside individual clinical laboratory submissions of likely pathogenic and uncertain significance.

clinvar ↗
2

This variant is absent from gnomAD v2.1 and is present only once in gnomAD v4.1 at an overall allele frequency of 0.0000619617% (1/1613900 alleles), which is below the PALB2 PM2_Supporting threshold of 0.000333%.

gnomad_v2 ↗ gnomad_v4 ↗ cspec ↗
3

In published functional studies, p.(Leu35Pro) disrupted the BRCA1-PALB2 interaction, impaired homologous recombination and homology-directed repair, reduced RAD51 foci formation, and increased sensitivity to cisplatin and PARP inhibition, findings consistent with a damaging effect on PALB2 function.

PMID:28319063 ↗ PMID:31636395 ↗
4

In silico splice prediction does not support an RNA effect, with SpliceAI showing a maximum delta score of 0.01; REVEL (0.35) and BayesDel (0.236696) scores are available, but the PALB2 specification does not use missense predictor data for PP3 or BP4.

spliceai ↗ cspec ↗
Applied criteria
Met
Not met
Not assessed
N/A
Very strong
Strong
Moderate
Supporting
Pathogenic evidence
PVS
PVS1
PS
PS1
PS2
PS3
PS4
PM
PM1
PM2
PM3
PM4
PM5
PM6
PP
PP1
PP2
PP3
PP4
PP5
Benign evidence
BA
BA1
BS
BS1
BS2
BS3
BS4
BP
BP1
BP2
BP3
BP4
BP5
BP6
BP7
PVS1
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Rationale
Select a criterion to inspect its explanation.
Evidence used
  • —
Gaps remaining
  • —
Rule
—
Publications
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Research and evidence
gnomAD v2.1 evidence
v2.1
gnomAD v4.1 evidence
v4.1
01
Population
gnomAD v2.1Absent from gnomAD v2.1.
gnomAD v4.1This variant is present in gnomAD v4.1 (AF= 6.19617e-07; MAF= 0.00006%, 1/1613900 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.4763e-07; MAF= 0.00008%, 1/1179760 alleles, homozygotes = 0).
gnomAD v2 ↗ gnomAD v4 ↗
ClinVar evidence
02
ClinVar
This variant has been reported in ClinVar as Likely pathogenic (2 clinical laboratories) and as Uncertain significance (2 clinical laboratories) and as Uncertain Significance by ClinGen Hereditary Breast, Ovarian and Pancreatic Cancer Variant Curation Expert Panel, ClinGen (expert panel).
ClinVar ↗
Functional evidence
03
Functional
OncoKB: Likely Oncogenic
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Loss-of-function; curated oncogenicity label: Likely Oncogenic.
OncoKB ↗
In silico evidence
04
In silico
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.01). REVEL score = 0.35. BayesDel score = 0.236696.
SpliceAI ↗
COSMIC evidence
05
COSMIC
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
COSMIC ↗
Cancer hotspots evidence
06
Cancer hotspots Not found
This variant does not lie in a statistically significant hotspot.
ResidueL35
Hotspots ↗