Enzymes A-Z

Complete database of 6965 enzymes with EC numbers, catalytic activities, alternative names, and UniProt cross-references. Browse by EC class or search for specific enzymes.

Enzymes A-Z

Complete database of 6965 enzymes with EC numbers, catalytic activities, alternative names, and UniProt cross-references. Browse by EC class or search for specific enzymes.

EC 4.3.3

Enzymes in sub-subclass EC 4.3.3. Total entries: 6.

EC 4.3.99

Enzymes in sub-subclass EC 4.3.99. Total entries: 3.

EC 4.4

Enzymes in subclass EC 4.4. Total entries: 39.

EC 4.4.1

Enzymes in sub-subclass EC 4.4.1. Total entries: 39.

EC 4.5

Enzymes in subclass EC 4.5. Total entries: 5.

EC 4.5.1

Enzymes in sub-subclass EC 4.5.1. Total entries: 5.

EC 4.6

Enzymes in subclass EC 4.6. Total entries: 18.

EC 4.6.1

Enzymes in sub-subclass EC 4.6.1. Total entries: 18.

EC 4.7

Enzymes in subclass EC 4.7. Total entries: 1.

EC 4.7.1

Enzymes in sub-subclass EC 4.7.1. Total entries: 1.

EC 4.8

Enzymes in subclass EC 4.8. Total entries: 8.

EC 4.8.1

Enzymes in sub-subclass EC 4.8.1. Total entries: 8.

EC 4.98

Enzymes in subclass EC 4.98. Total entries: 1.

EC 4.98.1

Enzymes in sub-subclass EC 4.98.1. Total entries: 1.

EC 4.99

Enzymes in subclass EC 4.99. Total entries: 8.

EC 4.99.1

Enzymes in sub-subclass EC 4.99.1. Total entries: 8.

Isomerases catalyze geometric or structural rearrangements within a single molecule. They convert one isomer to another through intramolecular rearrangements and are essential for carbohydrate metabolism and amino acid interconversion. This class contains 320 enzyme entries.

EC 5.1

Enzymes in subclass EC 5.1. Total entries: 83.

EC 5.1.1

Enzymes in sub-subclass EC 5.1.1. Total entries: 25.

EC 5.1.2

Enzymes in sub-subclass EC 5.1.2. Total entries: 7.

EC 5.1.3

Enzymes in sub-subclass EC 5.1.3. Total entries: 43.

EC 5.1.99

Enzymes in sub-subclass EC 5.1.99. Total entries: 8.

EC 5.2

Enzymes in subclass EC 5.2. Total entries: 11.

EC 5.2.1

Enzymes in sub-subclass EC 5.2.1. Total entries: 11.

EC 5.3

Enzymes in subclass EC 5.3. Total entries: 74.

EC 5.3.1

Enzymes in sub-subclass EC 5.3.1. Total entries: 32.

EC 5.3.2

Enzymes in sub-subclass EC 5.3.2. Total entries: 8.

EC 5.3.3

Enzymes in sub-subclass EC 5.3.3. Total entries: 21.

EC 5.3.4

Enzymes in sub-subclass EC 5.3.4. Total entries: 1.

EC 5.3.99

Enzymes in sub-subclass EC 5.3.99. Total entries: 12.

EC 5.4

Enzymes in subclass EC 5.4. Total entries: 97.

EC 5.4.1

Enzymes in sub-subclass EC 5.4.1. Total entries: 3.

EC 5.4.2

Enzymes in sub-subclass EC 5.4.2. Total entries: 12.

EC 5.4.3

Enzymes in sub-subclass EC 5.4.3. Total entries: 9.

EC 5.4.4

Enzymes in sub-subclass EC 5.4.4. Total entries: 8.

EC 5.4.99

Enzymes in sub-subclass EC 5.4.99. Total entries: 65.

EC 5.5

Enzymes in subclass EC 5.5. Total entries: 37.

EC 5.5.1

Enzymes in sub-subclass EC 5.5.1. Total entries: 37.

EC 5.6

Enzymes in subclass EC 5.6. Total entries: 16.

EC 5.6.1

Enzymes in sub-subclass EC 5.6.1. Total entries: 9.

EC 5.6.2

Enzymes in sub-subclass EC 5.6.2. Total entries: 7.

EC 5.99

Enzymes in subclass EC 5.99. Total entries: 2.

EC 5.99.1

Enzymes in sub-subclass EC 5.99.1. Total entries: 2.

EC 6 — Ligases

Ligases catalyze the joining of two molecules together, coupled with the hydrolysis of ATP or similar nucleotide triphosphates. They are essential for DNA replication, transcription, and biosynthetic pathways. This class contains 256 enzyme entries.