diphthine synthase activity (Q21114307)
Catalysis of the reaction: S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine = S-adenosyl-L-homocysteine + 2-(3-carboxy-3-(methylammonio)propyl)-L-histidine.
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aliases S-adenosyl-L-methionine:2-(3-carboxy-3-aminopropyl)-L-histidine methyltransferase activity
 GO:0004164
 S-adenosyl-L-methionine:elongation factor 2 methyltransferase activity
 diphthine methyltransferase activity
description Catalysis of the reaction: S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine = S-adenosyl-L-homocysteine + 2-(3-carboxy-3-(methylammonio)propyl)-L-histidine.

External Links
(P686) GO:0004164
(P2892) C1152264