1T1U | pdb_00001t1u

Structural Insights and Functional Implications of Choline Acetyltransferase

• PDB DOI: https://doi.org/10.2210/pdb1T1U/pdb

• Classification: TRANSFERASE
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-04-18 Released: 2005-04-12 
• Deposition Author(s): Govindasamy, L., Pedersen, B., Lian, W., Kukar, T., Gu, Y., Jin, S., Agbandje-McKenna, M., Wu, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 
  0.227 (Depositor), 0.244 (DCC) 
• R-Value Work: 
  0.171 (Depositor), 0.208 (DCC) 

Starting Model: experimental

Literature

Structural insights and functional implications of choline acetyltransferase

Govindasamy, L., Pedersen, B., Lian, W., Kukar, T., Gu, Y., Jin, S., Agbandje-McKenna, M., Wu, D.

(2004) J Struct Biol 148: 226-235

• PubMed: 15477102 
• DOI: https://doi.org/10.1016/j.jsb.2004.06.005
• Primary Citation Related Structures: 
  1T1U


• PubMed Abstract: 
  

  The biosynthetic enzyme for the neurotransmitter acetylcholine, choline acetyltransferase (ChAT) (E.C. 2.3.1.6), is essential for the development and neuronal activities of cholinergic systems involved in many fundamental brain functions. ChAT catalyzes the transfer of an acetyl group from acetyl-coenzyme A to choline to form the neurotransmitter acetylcholine. Since its discovery more than 60 years ago much research has been devoted to the kinetic studies of this enzyme. For the first time we report the crystal structure of rat ChAT (rChAT) to 1.55 A resolution. The structure of rChAT is a monomer and consists of two domains with an interfacial active site tunnel. This structure, with the modeled substrate binding, provides critical insights into the molecular basis for the production of acetylcholine and may further our understanding of disease causing mutations.

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Organizational Affiliation: 
• Department of Biochemistry and Molecular Biology, McKnight Brain Institute and University of Florida, Gainesville, FL 32610, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 71.91 kDa 
• Atom Count: 5,119 
• Modeled Residue Count: 597 
• Deposited Residue Count: 639 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Choline O-acetyltransferase	A	639	Rattus norvegicus	Mutation(s): 0  Gene Names: Chat EC: 2.3.1.6
UniProt
Find proteins for P32738 (Rattus norvegicus) Explore P32738  Go to UniProtKB:  P32738

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free:  0.227 (Depositor), 0.244 (DCC) 
• R-Value Work:  0.171 (Depositor), 0.208 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 138.949	α = 90
b = 77.505	β = 90
c = 59.209	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
REFMAC	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-04-12 
Deposition Author(s): Govindasamy, L., Pedersen, B., Lian, W., Kukar, T., Gu, Y., Jin, S., Agbandje-McKenna, M., Wu, D.

Revision History  

• Version 1.0: 2005-04-12
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-23
  Changes: Data collection, Database references, Refinement description