RRP1B
Chr 21ribosomal RNA processing 1B
Also known as: KIAA0179, NNP1L, Nnp1, PPP1R136, RRP1
RRP1B encodes a transcriptional coactivator that regulates DNA damage-induced apoptosis, ribosome biogenesis, and mRNA splicing. Mutations cause autosomal recessive neurodevelopmental disorder with seizures and brain abnormalities, typically presenting in early childhood. The gene is not highly constrained to loss-of-function variants.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Typical tolerance to LoF variation
Mild missense constraint
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
234 submitted variants in ClinVar
Classification Summary
Curated Variants Distribution
Classified variants from ClinVar · 5 ACMG categories
| Classification | LoF | Missense + Inframe | Non-coding | Synonymous | Total |
|---|---|---|---|---|---|
Pathogenic | 0 | 0 | 87 | 0 | 87 |
Likely Pathogenic | 0 | 0 | 4 | 0 | 4 |
VUS | 0 | 85 | 21 | 0 | 106 |
Likely Benign | 0 | 9 | 2 | 2 | 13 |
Benign | 0 | 1 | 1 | 1 | 3 |
Conflicting | — | 3 | |||
| Total | 0 | 95 | 115 | 3 | 216 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
RRP1B · 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