Hydrolase: Difference between revisions
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==Overview== | ==Overview== | ||
In [[biochemistry]], a '''hydrolase''' is an [[enzyme]] that catalyzes the [[hydrolysis]] of a [[chemical bond]]. For example, an enzyme that catalyzed the following reaction is a hydrolase: | In [[biochemistry]], a '''hydrolase''' is an [[enzyme]] that catalyzes the [[hydrolysis]] of a [[chemical bond]]. For example, an enzyme that catalyzed the following reaction is a hydrolase: | ||
Revision as of 19:32, 26 May 2009
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Overview
In biochemistry, a hydrolase is an enzyme that catalyzes the hydrolysis of a chemical bond. For example, an enzyme that catalyzed the following reaction is a hydrolase:
- A–B + H2O → A–OH + B–H
Nomenclature
Systematic names of hydrolases are formed as "substrate hydrolase." However, common names are typically in the form "substratease." For example, a nuclease is a hydrolase that cleaves nucleic acids.
Classification
Hydrolases are classified as EC 3 in the EC number classification of enzymes. Hydrolases can be further classified into several subclasses, based upon the bonds they act upon:
- EC 3.1: ester bonds (esterases: nucleases, phosphodiesterases, lipase, phosphatase)
- EC 3.2: sugars (glycosylases/DNA glycosylases, glycoside hydrolase)
- EC 3.3: ether bonds
- EC 3.4: peptide bonds (Proteases/peptidases)
- EC 3.5: carbon-nitrogen bonds, other than peptide bonds
- EC 3.6: acid anhydrides (acid anhydride hydrolases, including helicases and GTPase)
- EC 3.7: carbon-carbon bonds
- EC 3.8: halide bonds
- EC 3.9: phosphorus-nitrogen bonds
- EC 3.10: sulfur-nitrogen bonds
- EC 3.11: carbon-phosphorus bonds
- EC 3.12: sulfur-sulfur bonds
- EC 3.13: carbon-sulfur bonds
References
- EC 3 Introduction from the Department of Chemistry at Queen Mary, University of London, only covers 3.1-3.4
- More detailed taxonomy