CHRAC1
Chr 8chromatin accessibility complex subunit 1
Also known as: CHARC1, CHARC15, CHRAC-1, CHRAC-15, CHRAC15, YCL1
CHRAC1 encodes a histone-fold protein that forms complexes with DNA polymerase epsilon and binds DNA for incorporation into chromatin, working with nucleosome remodeling complexes. Mutations cause autosomal recessive intellectual disability with developmental delay, often presenting in early childhood. The gene shows high constraint against loss-of-function variants (pLI 1.0), indicating intolerance to protein-truncating mutations.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
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
86 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 | 51 | 0 | 51 |
Likely Pathogenic | 0 | 0 | 3 | 0 | 3 |
VUS | 0 | 16 | 6 | 0 | 22 |
Likely Benign | 0 | 1 | 0 | 0 | 1 |
Benign | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 17 | 60 | 0 | 77 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
CHRAC1 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
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