_EC 2.1.1.76 Quercetin 3-O-methyltransferase. 1 PDB entries  
EC 2.-.-.- Transferases. [17,949 PDB entries]
EC 2.1.-.- Transferring one-carbon groups. [1,711 PDB entries]
EC 2.1.1.- Methyltransferases. [1,381 PDB entries]
EC 2.1.1.76 Quercetin 3-O-methyltransferase. [1 PDB entries]    
1nii

Pathway: Methylated Quercetin Derivatives Biosynthesis
Reaction: S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone = S-adenosyl-L- homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxyflavone.
 


S-adenosyl-L-methionine
+
3,5,7,3',4'-pentahydroxyflavone
=
S-adenosyl-L- homocysteine
+
3-methoxy-5,7,3',4'-tetrahydroxyflavone
Molecule diagrams generated from .mol files obtained from the KEGG ftp site.

Other name(s): Flavonol 3-O-methyltransferase.
Comments: Specific for quercetin. Related enzymes bring about the 3-O-methylation of other flavonols, such as galangin and kaempferol.
Links:   [IntEnz]   [ExPASy]   [KEGG]  

There are 1 PDB entries in enzyme class E.C.2.1.1.76

  PDB code Protein
1nii
Arabidopsis thaliana o-methyltransferase predicted by homology-based modelling
Source: Arabidopsis thaliana. Thale cress
Chain: A (354 residues)