The Enzyme Database

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EC 1.14.11.12     
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
References:
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 1.14.11.12 created 1990]
 
 
EC 2.1.1.276     
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
References:
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 2.1.1.276 created 2013]
 
 


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