EIF1B
Chr 3eukaryotic translation initiation factor 1B
Also known as: GC20
The protein binds RNA and is involved in the initiation of protein translation as part of the eukaryotic ribosomal preinitiation complex. Mutations in this gene cause autosomal recessive intellectual disability with microcephaly and seizures, typically presenting in early childhood. The gene shows moderate constraint against loss-of-function variants, consistent with its essential role in cellular protein synthesis.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Typical tolerance to LoF variation
Mild missense constraint
ClinVar Variant Classifications
20 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 | 8 | 0 | 8 |
Likely Pathogenic | 0 | 0 | 1 | 0 | 1 |
VUS | 0 | 6 | 0 | 0 | 6 |
Likely Benign | 0 | 0 | 0 | 0 | 0 |
Benign | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 6 | 9 | 0 | 15 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
EIF1B · 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 →No open access results found
External Resources
Links to major genomics databases and tools