The Enzyme Database

Table of Contents

The enzymes in this section of the database are organized as you would find them in the Enzyme-Nomenclature book. Click [+] to expand, and [–] to collapse, any section. Clicking on a heading will open popup window with information on that class, subclass or sub-subclass.

For a fully expanded list of the classes, subclasses and sub-subclasses, click here

[+subclass]. [+sub-subclass]. [+serial]

EC 1 []   
    EC 1.1  [+]      
    EC 1.2  [+]      
    EC 1.3  [+]      
    EC 1.4  [+]      
    EC 1.5  [+]      
    EC 1.6  []      
        EC 1.6.1       [+]    With NAD+ or NADP+ as acceptor 
        EC 1.6.2       [+]    With a heme protein as acceptor 
        EC 1.6.3       [+]    With oxygen as acceptor 
        EC 1.6.4       [+]    With a disulfide as acceptor (deleted sub-subclass) 
        EC 1.6.5       [+]    With a quinone or similar compound as acceptor 
        EC 1.6.6       [+]    With a nitrogenous group as acceptor 
        EC 1.6.7       [+]    With an iron-sulfur protein as acceptor (deleted sub-subclass) 
        EC 1.6.8       [+]    With a flavin as acceptor (deleted sub-subclass) 
        EC 1.6.99       []    With unknown physiological acceptors 
                EC 1.6.99.1                      NADPH dehydrogenase 
                EC 1.6.99.2                      NAD(P)H dehydrogenase (quinone). Now EC 1.6.5.2, NAD(P)H dehydrogenase (quinone). The enzyme was erroneously transferred from this sub-subclass in 1965 
                EC 1.6.99.3                      NADH dehydrogenase. The activity is covered by EC 7.1.1.2, NADH:ubiquinone reductase (H+-translocating) 
                EC 1.6.99.4                      nitrite reductase. Now EC 1.18.1.2, ferredoxin—NADP+ reductase 
                EC 1.6.99.5                      NADH dehydrogenase (quinone). Transferred to EC 1.6.5.11, NADH dehydrogenase (quinone) 
                EC 1.6.99.6                      NADPH dehydrogenase (quinone). Now EC 1.6.5.10, NADPH dehydrogenase (quinone) 
                EC 1.6.99.7                      dihydropteridine reductase. Now EC 1.5.1.34, 6,7-dihydropteridine reductase 
                EC 1.6.99.8                      aquacobalamin reductase. This entry has been deleted since no specific enzyme catalysing this activity has been identified and it has been shown that aquacobalamin is efficiently reduced by free dihydroflavins and by non-specific reduced flavoproteins. 
                EC 1.6.99.9                      cob(II)alamin reductase. Now EC 1.16.1.4, cob(II)alamin reductase 
                EC 1.6.99.10                      dihydropteridine reductase (NADH). Now included with EC 1.5.1.34, 6,7-dihydropteridine reductase 
                EC 1.6.99.11                      aquacobalamin reductase (NADPH). This entry has been deleted since the enzyme the entry was based on was later shown to be EC 1.2.1.51, pyruvate dehydrogenase (NADP+). On the other hand, it has been shown that non-enzymatic reduction of cob(III)alamin to cob(II)alamin occurs efficiently in the presence of free dihydroflavins or non-specific reduced flavoproteins. 
                EC 1.6.99.12                      cyanocobalamin reductase (NADPH, cyanide-eliminating). Now EC 1.16.1.6, cyanocobalamin reductase (cyanide-eliminating) 
                EC 1.6.99.13                      ferric-chelate reductase. Now EC 1.16.1.7, ferric-chelate reductase 
    EC 1.7  [+]      
    EC 1.8  [+]      
    EC 1.9  [+]      
    EC 1.10  [+]      
    EC 1.11  [+]      
    EC 1.12  [+]      
    EC 1.13  [+]      
    EC 1.14  [+]      
    EC 1.15  [+]      
    EC 1.16  [+]      
    EC 1.17  [+]      
    EC 1.18  [+]      
    EC 1.19  [+]      
    EC 1.20  [+]      
    EC 1.21  [+]      
    EC 1.22  [+]      
    EC 1.23  [+]      
    EC 1.97  [+]      
    EC 1.98  [+]      
    EC 1.99  [+]      
EC 2 [+]   
EC 3 [+]   
EC 4 [+]   
EC 5 [+]   
EC 6 [+]   
EC 7 [+]   


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