Health Dictionary Find a Doctor

DPH5

Diphthine synthase is an enzyme that in humans is encoded by the DPH5 gene.[1][2]

This gene encodes a component of the diphthamide synthesis pathway. Diphthamide is a post-translationally modified histidine residue found only on translation elongation factor 2. It is conserved from archaebacteria to humans, and is targeted by diphtheria toxin and Pseudomonas exotoxin A to halt cellular protein synthesis. The yeast and Chinese hamster homologs of this protein catalyze the trimethylation of the histidine residue on elongation factor 2, resulting in a diphthine moiety that is subsequently amidated to yield diphthamide. Multiple transcript variants encoding different isoforms have been found for this gene.[2]

References

Further reading



© 2026 MyEClinic – IFTM Institut für Telematik in der Medizin GmbH