Ghk.
Gamma-glutamyl hydrolase is an
enzyme
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...
that
catalyses the following
chemical reaction
A chemical reaction is a process that leads to the IUPAC nomenclature for organic transformations, chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the pos ...
:
:
Hydrolysis
Hydrolysis (; ) is any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution reaction, substitution, elimination reaction, elimination, and solvation reactions in which water ...
of a gamma-glutamyl bond
This
lysosomal
A lysosome () is a membrane-bound organelle found in many animal Cell (biology), cells. They are spherical Vesicle (biology and chemistry), vesicles that contain Hydrolysis, hydrolytic enzymes that can break down many kinds of biomolecules. A ly ...
or secreted,
thiol
In organic chemistry, a thiol (; ), or thiol derivative, is any organosulfur compound of the form , where R represents an alkyl or other organic substituent. The functional group itself is referred to as either a thiol group or a sulfhydryl gro ...
-dependent
peptidase, most active at
acidic pH.
In humans, gamma-glutamyl hydrolase is encoded by the ''GGH''
gene
In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a ba ...
.
This gene catalyzes the hydrolysis of folylpoly-gamma-glutamates and antifolylpoly-gamma-glutamates by the removal of gamma-linked polyglutamates and glutamate.
Nomenclature
Gamma-glutamyl hydrolase is also known as conjugase, folate conjugase, lysosomal gamma-glutamyl carboxypeptidase, gamma-Glu-X carboxypeptidase, pteroyl-poly-gamma-glutamate hydrolase, carboxypeptidase G, folic acid conjugase, poly(gamma-glutamic acid) endohydrolase, polyglutamate hydrolase, poly(glutamic acid) hydrolase II, pteroylpoly-gamma-glutamyl hydrolase.
Interactive pathway map
References
Further reading
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
External links
*
*
{{Portal bar, Biology, border=no
EC 3.4.19