3-ethylmalate synthase
Encyclopedia
In enzymology, a 3-ethylmalate synthase is an enzyme
that catalyzes
the chemical reaction
The 3 substrates
of this enzyme are butanoyl-CoA, H2O
, and glyoxylate, whereas its two products
are 3-ethylmalate and CoA
.
This enzyme belongs to the family of transferase
s, specifically those acyltransferases that convert acyl groups into alkyl groups on transfer. The systematic name of this enzyme class is butanoyl-CoA:glyoxylate C-butanoyltransferase (thioester-hydrolysing, 1-carboxypropyl-forming). Other names in common use include 2-ethyl-3-hydroxybutanedioate synthase, and 3-ethylmalate glyoxylate-lyase (CoA-butanoylating). This enzyme participates in glyoxylate and dicarboxylate metabolism
.
Enzyme
Enzymes are proteins that catalyze chemical reactions. In enzymatic reactions, the molecules at the beginning of the process, called substrates, are converted into different molecules, called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates...
that catalyzes
Catalysis
Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in multiple chemical transformations....
the chemical reaction
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, typically following the input of some type of energy, such as heat, light or electricity...
- butanoyl-CoA + H2O + glyoxylate
3-ethylmalate + CoA
The 3 substrates
Substrate (biochemistry)
In biochemistry, a substrate is a molecule upon which an enzyme acts. Enzymes catalyze chemical reactions involving the substrate. In the case of a single substrate, the substrate binds with the enzyme active site, and an enzyme-substrate complex is formed. The substrate is transformed into one or...
of this enzyme are butanoyl-CoA, H2O
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...
, and glyoxylate, whereas its two products
Product (chemistry)
Product are formed during chemical reactions as reagents are consumed. Products have lower energy than the reagents and are produced during the reaction according to the second law of thermodynamics. The released energy comes from changes in chemical bonds between atoms in reagent molecules and...
are 3-ethylmalate and CoA
Coenzyme A
Coenzyme A is a coenzyme, notable for its role in the synthesis and oxidation of fatty acids, and the oxidation of pyruvate in the citric acid cycle. All sequenced genomes encode enzymes that use coenzyme A as a substrate, and around 4% of cellular enzymes use it as a substrate...
.
This enzyme belongs to the family of transferase
Transferase
In biochemistry, a transferase is an enzyme that catalyzes the transfer of a functional group from one molecule to another . For example, an enzyme that catalyzed this reaction would be a transferase:In this example, A would be the donor, and B would be the acceptor...
s, specifically those acyltransferases that convert acyl groups into alkyl groups on transfer. The systematic name of this enzyme class is butanoyl-CoA:glyoxylate C-butanoyltransferase (thioester-hydrolysing, 1-carboxypropyl-forming). Other names in common use include 2-ethyl-3-hydroxybutanedioate synthase, and 3-ethylmalate glyoxylate-lyase (CoA-butanoylating). This enzyme participates in glyoxylate and dicarboxylate metabolism
Glyoxylate and dicarboxylate metabolism
Glyoxylate and dicarboxylate metabolism describes a variety of reactions involving glyoxylate or dicarboxylates. Glyoxylate is the conjugate base of glyoxylic acid, and within a buffered environment of known pH such as the cell cytoplasm these terms can be used almost interchangeably, as the gain...
.