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Eukaryotic elongation factors

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Title: Eukaryotic elongation factors  
Author: World Heritage Encyclopedia
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Subject: Elongation factor, Eukaryotic translation, Protein biosynthesis, Prokaryotic initiation factor, Prokaryotic release factors
Publisher: World Heritage Encyclopedia

Eukaryotic elongation factors

Eukaryotic elongation factors are very similar to those in prokaryotes.

Elongation in eukaryotes is carried out with two elongation factors: eEF-1 and eEF-2.

  • The first is eEF-1, and has two subunits, α and βγ. α acts as counterpart to prokaryotic EF-Tu, mediating the entry of the aminoacyl tRNA into a free site of the ribosome. βγ acts as counterpart to prokaryotic EF-Ts, serving as the guanine nucleotide exchange factor for α, catalyzing the release of GDP from α.
  • The second elongation factor is eEF-2, the counterpart to prokaryotic EF-G, catalyzing the translocation of the tRNA and mRNA down the ribosome at the end of each round of polypeptide elongation.

External links

  • Explaining the function of eukaryotic elongation factors
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