EIF2B1

eukaryotic translation initiation factor 2B subunit alpha

The EIF2B1 gene provides instructions for making one of five parts of a protein called eIF2B, specifically the alpha subunit of this protein. 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 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.

Mutations in the EIF2B1 gene have been identified in a few people with leukoencephalopathy with vanishing white matter. 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.

Cytogenetic Location: 12q24.31, which is the long (q) arm of chromosome 12 at position 24.31

Molecular Location: base pairs 123,621,023 to 123,633,776 on chromosome 12 (Homo sapiens Annotation Release 108, GRCh38.p7) (NCBI)

Cytogenetic Location: 12q24.31, which is the long (q) arm of chromosome 12 at position 24.31
  • EI2BA_HUMAN
  • EIF-2B
  • EIF-2Balpha
  • EIF2B
  • EIF2BA
  • eukaryotic translation initiation factor 2B, subunit 1 (alpha, 26kD)
  • eukaryotic translation initiation factor 2B, subunit 1 alpha, 26kDa
  • MGC117409
  • MGC125868
  • MGC125869