5GJA

Crystal structure of Arabidopsis thaliana ACO2 in complex with 2-PA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Pyrazinamide and derivatives block ethylene biosynthesis by inhibiting ACC oxidase.

Sun, X.Li, Y.He, W.Ji, C.Xia, P.Wang, Y.Du, S.Li, H.Raikhel, N.Xiao, J.Guo, H.

(2017) Nat Commun 8: 15758-15758

  • DOI: 10.1038/ncomms15758
  • Primary Citation of Related Structures:  
    5GJ9, 5GJA

  • PubMed Abstract: 
  • Ethylene is an important phytohormone that promotes the ripening of fruits and senescence of flowers thereby reducing their shelf lives. Specific ethylene biosynthesis inhibitors would help to decrease postharvest loss. Here, we identify pyrazinamide (PZA), a clinical drug used to treat tuberculosis, as an inhibitor of ethylene biosynthesis in Arabidopsis thaliana, using a chemical genetics approach ...

    Ethylene is an important phytohormone that promotes the ripening of fruits and senescence of flowers thereby reducing their shelf lives. Specific ethylene biosynthesis inhibitors would help to decrease postharvest loss. Here, we identify pyrazinamide (PZA), a clinical drug used to treat tuberculosis, as an inhibitor of ethylene biosynthesis in Arabidopsis thaliana, using a chemical genetics approach. PZA is converted to pyrazinecarboxylic acid (POA) in plant cells, suppressing the activity of 1-aminocyclopropane-1-carboxylic acid oxidase (ACO), the enzyme catalysing the final step of ethylene formation. The crystal structures of Arabidopsis ACO2 in complex with POA or 2-Picolinic Acid (2-PA), a POA-related compound, reveal that POA/2-PA bind at the active site of ACO, preventing the enzyme from interacting with its natural substrates. Our work suggests that PZA and its derivatives may be promising regulators of plant metabolism, in particular ethylene biosynthesis.


    Organizational Affiliation

    Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
1-aminocyclopropane-1-carboxylate oxidase 2A, B, C, D, E, F, G, H303Arabidopsis thalianaMutation(s): 0 
Gene Names: ACO2EI305At1g62380F24O1.10
EC: 1.14.17.4
UniProt
Find proteins for Q41931 (Arabidopsis thaliana)
Explore Q41931 
Go to UniProtKB:  Q41931
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.455α = 90.06
b = 95.343β = 89.48
c = 95.892γ = 89.99
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data processing
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-10
    Type: Initial release
  • Version 1.1: 2017-05-17
    Changes: Structure summary
  • Version 1.2: 2017-09-27
    Changes: Data collection
  • Version 1.3: 2019-12-18
    Changes: Database references