Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 117.41 kDa 
• Atom Count: 7917 
• Residue Count: 991 
• Unique protein chains: 1

3VP6

Structural characterization of Glutamic Acid Decarboxylase; insights into the mechanism of autoinactivation

• DOI: 10.2210/pdb3VP6/pdb

• Classification: LYASE
• Organism(s): Homo sapiens
• Expression System: Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 2012-02-27 Released: 2013-01-16 
• Deposition Author(s): Langendorf, C.G., Tuck, K.L., Key, T.L.G., Rosado, C.J., Wong, A.S.M., Fenalti, G., Buckle, A.M., Law, R.H.P., Whisstock, J.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.234 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 

Literature

Structural characterization of the mechanism through which human glutamic acid decarboxylase auto-activates

Langendorf, C.G., Tuck, K.L., Key, T.L.G., Fenalti, G., Pike, R.N., Rosado, C.J., Wong, A.S.M., Buckle, A.M., Law, R.H.P., Whisstock, J.C.

(2013) Biosci Rep 33: 137-144

• PubMed: 23126365 
• DOI: 10.1042/BSR20120111
• Primary Citation of Related Structures:  
  3VP6


• PubMed Abstract: 
  

Imbalances in GABA (γ-aminobutyric acid) homoeostasis underlie psychiatric and movement disorders. The ability of the 65 kDa isoform of GAD (glutamic acid decarboxylase), GAD65, to control synaptic GABA levels is influenced through its capacity to auto-inactivate. In contrast, the GAD67 isoform is constitutively active. Previous structural insights suggest that flexibility in the GAD65 catalytic loop drives enzyme inactivation. To test this idea, we constructed a panel of GAD65/67 chimaeras and compared the ability of these molecules to auto-inactivate. Together, our data reveal the important finding that the C-terminal domain of GAD plays a key role in controlling GAD65 auto-inactivation. In support of these findings, we determined the X-ray crystal structure of a GAD65/67 chimaera that reveals that the conformation of the catalytic loop is intimately linked to the C-terminal domain.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne, VIC 3800, Australia.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamate decarboxylase 1	A, B	511	Homo sapiens	Mutation(s): 0  Gene Names: GAD1, GAD, GAD67 EC: 4.1.1.15
Find proteins for Q99259 (Homo sapiens) Explore Q99259  Go to UniProtKB:  Q99259
NIH Common Fund Data Resources
PHAROS:  Q99259 GTEx:  ENSG00000128683

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HLD	A, B	4-oxo-4H-pyran-2,6-dicarboxylic acid C7 H4 O6 PBAYDYUZOSNJGU-UHFFFAOYSA-N
GOL	B	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
LLP	A,B	L-PEPTIDE LINKING	C14 H22 N3 O7 P		LYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.234 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.006	α = 90
b = 64.084	β = 108.14
c = 102.646	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
BUSTER-TNT	refinement
PDB_EXTRACT	data extraction
BUSTER	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-02-27 
• Released Date: 2013-01-16 
Deposition Author(s): Langendorf, C.G., Tuck, K.L., Key, T.L.G., Rosado, C.J., Wong, A.S.M., Fenalti, G., Buckle, A.M., Law, R.H.P., Whisstock, J.C.

Revision History 

• Version 1.0: 2013-01-16
  Type: Initial release
  
• Version 1.1: 2013-08-14
  Changes: Database references