Crystal structure of apple ACC synthase in complex with L-aminoethoxyvinylglycine

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.205 

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This is version 1.4 of the entry. See complete history


Apple 1-Aminocyclopropane-1-carboxylate Synthase in Complex with the Inhibitor L-Aminoethoxyvinylglycine

Capitani, G.McCarthy, D.L.Gut, H.Gruetter, M.G.Kirsch, J.F.

(2002) J Biol Chem 277: 49735-49742

  • DOI: https://doi.org/10.1074/jbc.M208427200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The 1.6-A crystal structure of the covalent ketimine complex of apple 1-aminocyclopropane-1-carboxylate (ACC) synthase with the potent inhibitor l-aminoethoxyvinylglycine (AVG) is described. ACC synthase catalyzes the committed step in the biosynthesis of ethylene, a plant hormone that is responsible for the initiation of fruit ripening and for regulating many other developmental processes. AVG is widely used in plant physiology studies to inhibit the activity of ACC synthase. The structural assignment is supported by the fact that the complex absorbs maximally at 341 nm. These results are not in accord with the recently reported crystal structure of the tomato ACC synthase AVG complex, which claims that the inhibitor only associates noncovalently. The rate constant for the association of AVG with apple ACC synthase was determined by stopped-flow spectrophotometry (2.1 x 10(5) m(-1) s(-1)) and by the rate of loss of enzyme activity (1.1 x 10(5) m(-1) s(-1)). The dissociation rate constant determined by activity recovery is 2.4 x 10(-6) s(-1). Thus, the calculated K(d) value is 10-20 pm.

  • Organizational Affiliation

    Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. capitani@bioc.unizh.ch

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
1-aminocyclopropane-1-carboxylate synthase435Malus domesticaMutation(s): 0 
Find proteins for P37821 (Malus domestica)
Explore P37821 
Go to UniProtKB:  P37821
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37821
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on PPG

Download Ideal Coordinates CCD File 
B [auth A](2E,3E)-4-(2-aminoethoxy)-2-[({3-hydroxy-2-methyl-5-[(phosphonooxy)methyl]pyridin-4-yl}methyl)imino]but-3-enoic acid
C14 H20 N3 O8 P
Query on MRD

Download Ideal Coordinates CCD File 
C6 H14 O2
Binding Affinity Annotations 
IDSourceBinding Affinity
PPG PDBBind:  1M7Y Kd: 0.01 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.31α = 90
b = 61.14β = 123.36
c = 77.14γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-23
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2011-12-28
    Changes: Non-polymer description
  • Version 1.4: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description