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EC 2.5.1.108 Details
EC number
2.5.1.108
Accepted name
2-(3-amino-3-carboxypropyl)histidine synthase
Reaction
S-adenosyl-L-methionine + L-histidine-[translation elongation factor 2] = S-methyl-5′-thioadenosine + 2-[(3S)-3-amino-3-carboxypropyl]-L-histidine-[translation elongation factor 2]
Other name(s)
Dph2
Systematic name
S-adenosyl-L-methionine:L-histidine-[translation elongation factor 2] 2-[(3S)-3-amino-3-carboxypropyl]transferase
Comment
A [4Fe-4S] enzyme that modifies a histidine residue of the translation elongation factor 2 (EF2) via a 3-amino-3-carboxypropyl radical. The enzyme is present in archae and eukaryotes but not in eubacteria. The enzyme is a member of the ’AdoMet radical’ (radical SAM) family and generates the 3-amino-3-carboxypropyl radical by an uncanonical clevage of S-adenosyl-L-methionine. The relevant histidine of EF2 is His715 in mammals, His699 in yeast and His600 in Pyrococcus horikoshii. Part of diphthamide biosynthesis.
History
created 2013
EC Tree
2.5.1.12 created 1972, deleted 1976
2.5.1.13 created 1972, deleted 1976
2.5.1.14 created 1972, deleted 1976
2.5.1.37 created 1989, deleted 2004
2.5.1.40 created 1992, deleted 1999