The Enzyme Database

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Accepted name: gibberellin-44 dioxygenase
Reaction: gibberellin 44 + 2-oxoglutarate + O2 = gibberellin 19 + succinate + CO2
For diagram of diterpenoid biosynthesis, click here
Other name(s): oxygenase, gibberellin A44 oxidase; (gibberellin-44), 2-oxoglutarate:oxygen oxidoreductase
Systematic name: (gibberellin-44),2-oxoglutarate:oxygen oxidoreductase
Comments: Requires Fe2+.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 112198-85-3
1.  Gilmour, S.J., Bleecker, A.B. and Zeevaart, J.A.D. Partial-purification of gibberellin oxidases from spinach leaves. Plant Physiol. 85 (1987) 87–90. [PMID: 16665690]
[EC created 1990]
Accepted name: gibberellin A4 carboxyl methyltransferase
Reaction: S-adenosyl-L-methionine + gibberellin A4 = S-adenosyl-L-homocysteine + methyl gibberellin A4
Glossary: gibberellin A4 = (1S,2S,4aR,4bR,7R,9aR,10S,10aR)-2-hydroxy-1-methyl-8-methylidene-13-oxododecahydro-4a,1-(epoxymethano)-7,9a-methanobenzo[a]azulene-10-carboxylic acid
methyl gibberellin A4 = methyl (1S,2S,4aR,4bR,7R,9aR,10S,10aR)-2-hydroxy-1-methyl-8-methylene-13-oxododecahydro-4a,1-(epoxymethano)-7,9a-methanobenzo[a]azulene-10-carboxylate
Other name(s): GAMT2; gibberellin A4 O-methyltransferase
Systematic name: S-adenosyl-L-methionine:gibberellin A4 O-methyltransferase
Comments: The enzyme also methylates gibberellins A34 (80%), A9 (60%), and A3 (45%) with significant activity.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Varbanova, M., Yamaguchi, S., Yang, Y., McKelvey, K., Hanada, A., Borochov, R., Yu, F., Jikumaru, Y., Ross, J., Cortes, D., Ma, C.J., Noel, J.P., Mander, L., Shulaev, V., Kamiya, Y., Rodermel, S., Weiss, D. and Pichersky, E. Methylation of gibberellins by Arabidopsis GAMT1 and GAMT2. Plant Cell 19 (2007) 32–45. [DOI] [PMID: 17220201]
[EC created 2013]

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