6K80

Crystal Structure of Drosophila melanogaster Dopamine N-Acetyltransferase in Complex with CoA and Tryptophol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

An essential role of acetyl coenzyme A in the catalytic cycle of insect arylalkylamine N-acetyltransferase.

Wu, C.Y.Hu, I.C.Yang, Y.C.Ding, W.C.Lai, C.H.Lee, Y.Z.Liu, Y.C.Cheng, H.C.Lyu, P.C.

(2020) Commun Biol 3: 441-441

  • DOI: https://doi.org/10.1038/s42003-020-01177-9
  • Primary Citation of Related Structures:  
    5GI5, 5GI7, 5GI9, 6K80

  • PubMed Abstract: 

    Acetyl coenzyme A (Ac-CoA)-dependent N-acetylation is performed by arylalkylamine N-acetyltransferase (AANAT) and is important in many biofunctions. AANAT catalyzes N-acetylation through an ordered sequential mechanism in which cofactor (Ac-CoA) binds first, with substrate binding afterward. No ternary structure containing AANAT, cofactor, and substrate was determined, meaning the details of substrate binding and product release remain unclear. Here, two ternary complexes of dopamine N-acetyltransferase (Dat) before and after N-acetylation were solved at 1.28 Å and 1.36 Å resolution, respectively. Combined with the structures of Dat in apo form and Ac-CoA bound form, we addressed each stage in the catalytic cycle. Isothermal titration calorimetry (ITC), crystallography, and nuclear magnetic resonance spectroscopy (NMR) were utilized to analyze the product release. Our data revealed that Ac-CoA regulates the conformational properties of Dat to form the catalytic site and substrate binding pocket, while the release of products is facilitated by the binding of new Ac-CoA.


  • Organizational Affiliation

    Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, 30013, Taiwan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dopamine N-acetyltransferase214Drosophila melanogasterMutation(s): 0 
Gene Names: AANAT1DatNAT1CG3318
EC: 2.3.1.87
UniProt
Find proteins for Q94521 (Drosophila melanogaster)
Explore Q94521 
Go to UniProtKB:  Q94521
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ94521
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.636α = 90
b = 56.447β = 90
c = 84.068γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (Taiwan)Taiwan106-2311-B-007-004-MY3

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-17
    Type: Initial release
  • Version 1.1: 2021-07-07
    Changes: Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description