# EIF1AX

Source: https://onco.cc/targets/eif1ax/  
OnCo record `eif1ax` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

EIF1AX (Eukaryotic translation initiation factor 1A, X-chromosomal) is a gene that drives cell growth when it is altered. The public catalogues list it as an oncogene driver, a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Endometrial cancer, Lung cancer, Prostate cancer and 4 more.

## Summary

Component of the 43S pre-initiation complex (43S PIC), which binds to the mRNA cap-proximal region, scans mRNA 5'-untranslated region, and locates the initiation codon. This protein enhances formation of the cap-proximal complex. Together with EIF1, facilitates scanning, start codon recognition, promotion of the assembly of 48S complex at the initiation codon (43S PIC becomes 48S PIC after the start codon is reached), and dissociation of aberrant complexes.

CIViC holds 1 clinical evidence item and 0 assertions across 1 variant. Open Targets scores its association with cancer at 0.58 (direct and indirect evidence; datatypes literature 0.81, genetic association 0.00, somatic mutation 0.74). IntOGen calls it a driver in 7 cohorts (5 activating, 2 loss-of-function), covering Lung, Prostate Adenocarcinoma, Cutaneous Melanoma, Endometrial Carcinoma, Uveal Melanoma, Well-Differentiated Thyroid Cancer.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: eukaryotic translation initiation factor 1A X-linked; Eukaryotic translation initiation factor 1A, X-chromosomal; eIF-1A; eIF-4C; EIF4C; EIF1A
- Tags: cancer-genes-wave
- Symbol: EIF1AX
- Class: oncogene
- Biology: Component of the 43S pre-initiation complex (43S PIC), which binds to the mRNA cap-proximal region, scans mRNA 5'-untranslated region, and locates the initiation codon. This protein enhances formation of the cap-proximal complex. Together with EIF1, facilitates scanning, start codon recognition, promotion of the assembly of 48S complex at the initiation codon (43S PIC becomes 48S PIC after the start codon is reached), and dissociation of aberrant complexes. After start codon location, together with EIF5B orients the initiator methionine-tRNA in a conformation that allows 60S ribosomal subunit joining to form the 80S initiation complex. Is released after 80S initiation complex formation, just after GTP hydrolysis by EIF5B, and before release of EIF5B. Its globular part is located in the A site of the 40S ribosomal subunit. Location: Cytoplasm (UniProt). Locus Xp22.12 (HGNC).
- Where found: Endometrial cancer: IntOGen driver in 2 cohorts (UCEC); Lung cancer: IntOGen driver in 1 cohort (LUNG); Prostate cancer: IntOGen driver in 1 cohort (PRAD); Thyroid cancer: IntOGen driver in 1 cohort (WDTC); Uveal melanoma: CIViC evidence names this disease; IntOGen driver in 1 cohort (UM); Melanoma: IntOGen driver in 1 cohort (SKCM)

## Notes

- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: IntOGen calls it an activating (Act) driver in 5 cohorts; IntOGen calls it a loss-of-function (LoF) driver in 2 cohorts; CIViC holds 1 clinical evidence items on its variants. Evidence tier "clinical-evidence" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.

## Sources

- HGNC HGNC:3250: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:3250
- UniProt P47813: https://www.uniprot.org/uniprotkb/P47813/entry
- NCBI Gene 1964: https://www.ncbi.nlm.nih.gov/gene/1964
- Ensembl ENSG00000173674: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000173674

## Connected records

- collections: [CIViC](https://onco.cc/collections/civic/), [IntOGen](https://onco.cc/collections/intogen/), [Open Targets Platform](https://onco.cc/collections/open-targets/)
- cancers: [Endometrial cancer](https://onco.cc/cancers/endometrial/), [Lung cancer (all types)](https://onco.cc/cancers/lung-cancer/), [Melanoma](https://onco.cc/cancers/melanoma/), [Papillary thyroid cancer](https://onco.cc/cancers/papillary-thyroid-cancer/), [Prostate cancer](https://onco.cc/cancers/prostate/), [Thyroid cancer](https://onco.cc/cancers/thyroid/), [Uveal melanoma](https://onco.cc/cancers/uveal-melanoma/)

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JSON: https://onco.cc/api/v1/entities/eif1ax.json