APOBEC1
Chr 12apolipoprotein B mRNA editing enzyme catalytic subunit 1
Also known as: APO1, APOBEC-1, BEDP, CDAR1, HEPR
This cytidine deaminase enzyme catalyzes C-to-U postranscriptional editing of mRNAs including apolipoprotein B and neurofibromatosis-1 transcripts, forming editing complexes with cofactor proteins. Biallelic mutations cause autosomal recessive developmental and epileptic encephalopathy with developmental delay, seizures, and brain malformations typically presenting in infancy. The gene is not constrained against loss-of-function variants.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Mild missense constraint
This gene has evidence for multiple mechanisms of pathogenicity (dominant-negative and gain-of-function). Both the Badonyi & Marsh prediction and the broader genomic evidence point to dominant-negative as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.
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
APOBEC1 · 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