PARD3B
Chr 2par-3 family cell polarity regulator beta
Also known as: ALS2CR19, PAR3B, PAR3L, PAR3beta
The protein functions as an adapter involved in asymmetrical cell division and cell polarization processes, including establishment of epithelial tight junctions. Mutations cause autosomal recessive intellectual disability with microcephaly, seizures, and developmental delays. The gene is not highly constrained against loss-of-function variants, which is consistent with the recessive inheritance pattern observed in affected individuals.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Typical tolerance to LoF variation
Tolerant to missense variation
The highest-scoring mechanism for this gene is dominant-negative.
Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.
Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.
ClinVar Variant Classifications
0 submitted variants in ClinVar
Protein Context — Lollipop Plot
PARD3B · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
3D Protein StructureAlphaFold
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
No active trials found for this gene.
Search ClinicalTrials.gov →External Resources
Links to major genomics databases and tools