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EIF2B2 gene
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Gene

EIF2B2 gene

The EIF2B2 gene provides instructions for creating a subunit of the eIF2B protein, which is essential for regulating protein synthesis within cells.

Normal Function

The EIF2B2 gene provides instructions for making one of five parts of a protein called eIF2B, specifically the beta subunit. The eIF2B protein helps regulate overall protein production (synthesis) in the cell by interacting with another protein, eIF2. The eIF2 protein is called an initiation factor because it is involved in starting (initiating) protein synthesis.

Under some conditions, eIF2B increases protein synthesis by helping to recycle molecules called GTP, which carry energy to the initiation factor. Under other conditions, it slows protein synthesis by binding tightly to the initiation factor, which converts the eIF2B protein into an inactive form and prevents the recycling of GTP.

Proper regulation of protein synthesis is vital for ensuring that the correct levels of protein are available for the cell to cope with changing conditions. For example, cells must synthesize protein much faster if they are multiplying than if they are in a resting state.

Health Conditions Related to Genetic Changes

Leukoencephalopathy with vanishing white matter

Mutations in the EIF2B2 gene have been identified in a few people with leukoencephalopathy with vanishing white matter, including some affected females with a variant of the disorder in which the neurological features are accompanied by ovarian failure (ovarioleukodystrophy). These mutations cause partial loss of eIF2B function. Impairment of eIF2B function makes it more difficult for the body's cells to regulate protein synthesis and deal with changing conditions and stress. Researchers believe that cells in the white matter (nerve fibers covered by a fatty substance called myelin that insulates and protects nerves) may be particularly affected by an abnormal response to stress, resulting in the signs and symptoms of leukoencephalopathy with vanishing white matter.

Other Names for This Gene

  • EI2BB_HUMAN
  • EIF-2Bbeta
  • EIF2B
  • eukaryotic translation initiation factor 2B, subunit 2 (beta, 39kD)
  • eukaryotic translation initiation factor 2B, subunit 2 beta, 39kDa

Frequently Asked Questions

No cure exists, but management focuses on minimizing stressors (prompt fever control, avoiding dehydration, careful handling of minor injuries) and providing supportive therapies—physical, occupational, and speech therapy—to preserve function. Some centers enroll patients in clinical trials of agents that modulate the integrated stress response, but these are experimental.
Genetic confirmation requires sequencing of the EIF2B2 gene from a blood or saliva sample, usually ordered by a neurologist or medical geneticist after clinical suspicion of vanishing white matter disease. The test looks for pathogenic variants and may be part of a broader leukoencephalopathy gene panel.
Stressful events such as fever, head trauma, or dehydration increase cellular stress, which the partially defective eIF2B complex cannot handle. This leads to a rapid decline in protein synthesis regulation, causing acute worsening of motor function, loss of coordination, or even regression of previously acquired skills.
The first signs often appear before age 5 and include delayed motor milestones, clumsiness, frequent falls, and subtle speech delays. Some children develop spasticity or ataxia, and MRI typically shows diffuse, symmetric white‑matter changes that may look “vanished” over time.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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