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Diphthamide is a unique posttranslationally modified histidine found only in translation elongation factor-2 (EEF2; MIM 130610). This modification is conserved from archaebacteria to humans and serves as the target for ADP-ribosylation and inactivation of EEF2 by diphtheria toxin (DT) and Pseudomonas exotoxin A. DPH1 is 1 of several enzymes involved in synthesis of diphthamide in EEF2 (Liu et al., 2004 [PubMed 15485916]).[supplied by OMIM, Mar 2008]
Q9BZG8 [Direct mapping] Diphthamide biosynthesis protein 1
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SPOCTOPUS predicted membrane proteins Phobius predicted secreted proteins Predicted intracellular proteins Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
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GO:0005515 [protein binding] GO:0005634 [nucleus] GO:0005829 [cytosol] GO:0008283 [cell proliferation] GO:0017183 [peptidyl-diphthamide biosynthetic process from peptidyl-histidine] GO:0043687 [post-translational protein modification] GO:0044267 [cellular protein metabolic process]