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In biochemistry, a transferase is an enzyme that catalyzes the transfer of a functional group (e.g. a methyl or phosphate group) from one molecule (called the donor) to another (called the acceptor). For example, an enzyme that catalyzed this reaction would be a transferase:

A–X + B → A + B–X

In this example, A would be the donor, and B would be the acceptor. The donor is often a coenzyme.


Proper names of transferases are formed as "donor:acceptor grouptransferase." However, other names are much more common. The common names of transferases are often formed as "acceptor grouptransferase" or "donor grouptransferase." For example, a DNA methyltransferase is a transferase that catalyzes the transfer of a methyl group to a DNA acceptor.


Transferases are classified as EC 2 in the EC number classification. Transferases can be further classified into nine subclasses:

  • EC 2.1 includes enzymes that transfer one-carbon groups (methyltransferase)
  • includes enzymes that transfer aldehyde or ketone groups
  • EC 2.3 includes acyltransferases
  • EC 2.4 includes glycosyltransferases
  • EC 2.5 includes enzymes that transfer alkyl or aryl groups, other than methyl groups
  • EC 2.6 includes enzymes that transfer nitrogenous groups (transaminase)
  • EC 2.7 includes enzymes that transfer phosphorus-containing groups (phosphotransferase, including polymerase and kinase)
  • EC 2.8 includes enzymes that transfer sulfur-containing groups (sulfurtransferase and sulfotransferase)
  • includes enzymes that transfer selenium-containing groups


  • EC 2 Introduction from the Department of Chemistry at Queen Mary, University of London
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Transferase". A list of authors is available in Wikipedia.
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