Tags: Chemical Compound, Chemical Substance.
Diphthamide is a modified histidine amino acid found in eukaryotic elongation factor 2 (eEF-2). It is usually found at position H715 in mammalian eEF2 (H699 in yeast). This residue is modified by the protein encoded by the OVCA1 gene (homolog of DPH1 in mice). DPH1 knockout mice are inviable while heterozygotes develop diverse types of carcinomas and sarcomas. In humans OVCA1 is frequently found mutated in ovarian cancer.
