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Information on EC 4.1.1.15 - glutamate decarboxylase

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EC Tree
     4 Lyases
         4.1 Carbon-carbon lyases
             4.1.1 Carboxy-lyases
                4.1.1.15 glutamate decarboxylase
IUBMB Comments
A pyridoxal-phosphate protein. The brain enzyme also acts on L-cysteate, 3-sulfino-L-alanine and L-aspartate.
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This record set is specific for:
UNIPROT: Q05329
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Word Map
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria, Archaea
Synonyms
glutamic acid decarboxylase, gad65, gad67, glutamate decarboxylase, glutamic acid decarboxylase 65, glutamic acid decarboxylase 67, gad-65, gad-67, glutamate decarboxylase 67, l-glutamate decarboxylase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Glutamic acid decarboxylase
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glutamic acid decarboxylase 65
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L-glutamate decarboxylase 65
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L-Glutamic acid decarboxylase
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65 kDa glutamic acid decarboxylase
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-
-
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67 kDa glutamic acid decarboxylase
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-
-
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Aspartate 1-decarboxylase
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-
-
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Aspartic alpha-decarboxylase
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-
-
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Cysteic acid decarboxylase
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-
-
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Decarboxylase, glutamate
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-
-
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ERT D1
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-
-
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GAD
-
-
-
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GAD-65
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-
-
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GAD-67
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-
-
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GAD-alpha
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-
-
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GAD-beta
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-
-
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GAD-gamma
-
-
-
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GADCase
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-
-
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gamma-Glutamate decarboxylase
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-
-
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GDCase
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-
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Glutamic acid decarboxylase
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-
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Glutamic decarboxylase
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-
-
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L-Aspartate-alpha-decarboxylase
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-
-
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L-Glutamate alpha-decarboxylase
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-
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L-Glutamate decarboxylase
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L-Glutamic acid decarboxylase
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L-Glutamic decarboxylase
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MGAD
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-
-
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
decarboxylation
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-
-
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SYSTEMATIC NAME
IUBMB Comments
L-glutamate 1-carboxy-lyase (4-aminobutanoate-forming)
A pyridoxal-phosphate protein. The brain enzyme also acts on L-cysteate, 3-sulfino-L-alanine and L-aspartate.
CAS REGISTRY NUMBER
COMMENTARY hide
9024-58-2
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
L-glutamate
4-aminobutanoate + CO2
show the reaction diagram
additional information
?
-
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
L-glutamate
4-aminobutanoate + CO2
show the reaction diagram
additional information
?
-
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
pyridoxal 5'-phosphate
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
3-Mercaptopropionic acid
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allylglycine
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betulinic acid
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ursolic acid
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valerenic acid
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additional information
ginsenosides in ginseng extract, high content of Rb1, inhibit the enzyme
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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
asiaticoside
stimulates at 0.0104 mM in vitro by 22%. No stimulation is observed in the absence of pyridoxal 5'-phosphate, so it is unlikely that asiaticoside acts as a PLP mimic
bilobalide
stimulates at 0.0306 mM in vitro by 18%
additional information
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IC50 VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.0123
3-Mercaptopropionic acid
Homo sapiens
recombinant MBP-tagged enzyme, pH 8.0, 37°C
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
0.00024
recombinant GST-tagged enzyme, pH 8.0, 37°C
0.00038
recombinant MBP-tagged enzyme, pH 8.0, 37°C
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
7.4 - 8
assay at
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
37
assay at
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
palmitoylated GAD65 co-localizes with Rab5 in Golgi membranes and axons, and Rab5 regulates the trafficking of palmitoylated GAD65 from Golgi membranes to axons in an endosomal trafficking pathway
Manually annotated by BRENDA team
palmitoylated GAD65 co-localizes with Rab5 in Golgi membranes and axons, and Rab5 regulates the trafficking of palmitoylated GAD65 from Golgi membranes to axons in an endosomal trafficking pathway
Manually annotated by BRENDA team
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
malfunction
physiological function
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
DCE2_HUMAN
585
0
65411
Swiss-Prot
other Location (Reliability: 2)
PDB
SCOP
CATH
UNIPROT
ORGANISM
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
lipoprotein
palmitoylation of cysteines 30 and 45 is critical for post-Golgi trafficking of GAD65 to presynaptic sites and for its relative dendritic exclusion, leading to the presynaptic clustering of GAD65
phosphoprotein
isozyme GAD65 is activated by phosphorylation at Thr95, while isozyme GAD67 is inhibited by phosphorylation. Gad65 is also phosphorylated at Ser417. The effect of phosphorylation on GAD65 and GAD67 can be reversed by treatment with protein phosphatases. Protein kinase A (PKA) and protein kinase C isoform epsilon are the protein kinases responsible for phosphorylation and regulation of GAD67 and GAD65, respectively
proteolytic modification
conversion of full-length GAD65 to truncated GAD65 is not the result of random post-mortem degradation, but that it is an intracellular process that is highly regulated. The cleavage is mediated by calpain, a Ca2+-dependent cysteine protease
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
C30A
mutation of Cys30 to Ala abolishes the presynaptic clustering of GAD65 in primary hippocampal neurons
C45A
mutation of Cys30 to Ala abolishes the presynaptic clustering of GAD65 in primary hippocampal neurons
T95A
site-directed mutagenesis, the mutation T95A of the phosphorylation site abolishes the phosphorylation and its effects on enzyme activity
T95E
site-directed mutagenesis, when the phosphorylation site T95 is mutated to glutamic acid, which mimics the phosphorylation status of hGAD65, the enzyme activity is greatly increased. An increase of GAD65 activity by 55% compared to the wild type hGAD65 is observed indicating that mutation of T95 to glutamic acid mimics the effect of phosphorylation
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant GST-tagged enzyme from Escherichia coli strain DH5alpha by glutathione affinity chromatography, recombinant MBP-tagged enzyme from Escherichia coli strain DH5alpha by amylose affinity chromatography
recombinant GST-tagged wild-type isozyme GAD65 from Escherichia coli strain DH5alpha by glutathione affinity chromatography and cleavage of the GST-tag by Factor Xa, followed by another step of glutathione affinity chromatography, or recombinant GST-tagged wild-type isozyme GAD65 from Escherichia coli strain BL21 by glutathione affinity chromatography and cleavage of the GST-tag by PreScission protease cleavage
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
gene GAD65, recombinant expression of GST-tagged or MBP-fusion wild-type enzyme, a 1757-bp hGAD65 insert from the pET-5C plasmid subcloned into the pMAL-c2X protein fusion system, in Escherichia coli strain DH5alpha, 1.6fold higher hGAD65 activity of the purified MBP-tagged enzyme construct compared to GST-tagged enzyme
gene GAD65, recombinant expression of GST-tagged wild-type and mutant isozymes in Escherichia coli strain DH5alpha or strain BL21
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Wei, J.; Wu, J.Y.
Post-translational regulation of L-glutamic acid decarboxylase in the brain
Neurochem. Res.
33
1459-1465
2008
Mus musculus, Rattus norvegicus, Homo sapiens (Q05329), Homo sapiens (Q99259)
Manually annotated by BRENDA team
Chou, C.C.; Modi, J.P.; Wang, C.Y.; Hsu, P.C.; Lee, Y.H.; Huang, K.F.; Wang, A.H.; Nan, C.; Huang, X.; Prentice, H.; Wei, J.; Wu, J.Y.
Activation of brain L-glutamate decarboxylase 65 isoform (GAD65) by phosphorylation at threonine 95 (T95)
Mol. Neurobiol.
54
866-873
2017
Homo sapiens (Q05329), Homo sapiens (Q99259), Homo sapiens, Rattus norvegicus (Q05683), Rattus norvegicus Sprague Dawley (Q05683)
Manually annotated by BRENDA team
Awad, R.; Crump, K.; Mullally, M.; Sardana, R.K.; Arnason, J.T.; Trudeau, V.L.
An improved method for production of recombinant human glutamic acid decarboxylase 65 for use in phytopharmaceutical assessment
Pharm. Biol.
46
72-81
2008
Homo sapiens (Q05329)
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Manually annotated by BRENDA team