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ENZYME entry: EC

Accepted Name
Archaeosine synthase.
Reaction catalysed
L-glutamine + 7-cyano-7-carbaguanine(15) in tRNA + H(2)O <=> L-glutamate + archaeine(15) in tRNA
  • In Euryarchaeota the reaction is catalyzed by ArcS.
  • In Crenarchaeota, which do not have an ArcS homolog, the reaction is catalyzed either by a homolog of EC that includes a glutaminase domain (cf. EC, or by a homolog of EC
  • The enzyme from the Euryarchaeon Methanocaldococcus jannaschii can also use arginine and ammonium as amino donors.
PRIAM enzyme-specific profiles2.6.1.97
KEGG Ligand Database for Enzyme Nomenclature2.6.1.97
IUBMB Enzyme Nomenclature2.6.1.97
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