NCIt definition : A lyase that catalyzes the decarboxylation of glutamate to gamma-aminobutyric acid
(GABA) and carbon dioxide (CO2), which uses pyridoxal-phosphate (PLP) as a cofactor.
There are two human isoforms of glutamate decarboxylase that are responsible for maintaining
the majority of the physiological supply of GABA.;
Alternative definition : CDISC: Any antigen(s) encoded by the GAD gene that catalyze the decarboxylation of
glutamate to GABA. They can be considered as autoantigens and are commonly associated
with the autoimmune diseases type 1 diabetes, autoimmune polyendocrine syndrome types
1 and 2, and stiff man syndrome.;