3PIU

High-resolution structure of native Malus domestica ACC synthase

• PDB DOI: https://doi.org/10.2210/pdb3PIU/pdb

• Classification: LYASE
• Organism(s): Malus domestica
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2010-11-08 Released: 2010-12-15 
• Deposition Author(s): Scharer, M.A., Grutter, M.G., Capitani, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.171 
• R-Value Work: 0.149 
• R-Value Observed: 0.149 

Starting Model: experimental

Literature

Structural basis for reduced activity of 1-aminocyclopropane-1-carboxylate synthase affected by a mutation linked to andromonoecy.

Scharer, M.A., Eliot, A.C., Grutter, M.G., Capitani, G.

(2011) FEBS Lett 585: 111-114

• PubMed: 21075107 
• DOI: https://doi.org/10.1016/j.febslet.2010.11.013
• Primary Citation of Related Structures:  
  3PIU


• PubMed Abstract: 
  

  1-aminocyclopropane-1-carboxylate synthase (ACS) is a key enzyme in the biosynthesis of the plant hormone ethylene. Recently, a new biological role for ACS has been found in Cucumis melo where a single point mutation (A57V) of one isoform of the enzyme, causing reduced activity, results in andromonoecious plants. We present here a straightforward structural basis for the reduced activity of the A57V mutant, based on our work on Malus domestica ACS, including a new structure of the unliganded apple enzyme at 1.35Å resolution.

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Organizational Affiliation: 

Biomolecular Research, Paul Scherrer Institut, Villigen PSI, Switzerland.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 49.55 kDa 
• Atom Count: 3,739 
• Modelled Residue Count: 410 
• Deposited Residue Count: 436 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
1-aminocyclopropane-1-carboxylate synthase	A	435	Malus domestica	Mutation(s): 1  Gene Names: ACS-1 EC: 4.4.1.14
UniProt
Find proteins for P37821 (Malus domestica) Explore P37821  Go to UniProtKB:  P37821

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLR	B [auth A]	(5-HYDROXY-4,6-DIMETHYLPYRIDIN-3-YL)METHYL DIHYDROGEN PHOSPHATE C8 H12 N O5 P RBCOYOYDYNXAFA-UHFFFAOYSA-N

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.171 
• R-Value Work: 0.149 
• R-Value Observed: 0.149 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 103.71	α = 90
b = 61.14	β = 123.12
c = 76.83	γ = 90

Software Package:

Software Name	Purpose
XSCALE	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-12-15 
Deposition Author(s): Scharer, M.A., Grutter, M.G., Capitani, G.

Revision History  

• Version 1.0: 2010-12-15
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-09-06
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.3: 2023-12-06
  Changes: Data collection