1ASQ

X-RAY STRUCTURES AND MECHANISTIC IMPLICATIONS OF THREE FUNCTIONAL DERIVATIVES OF ASCORBATE OXIDASE FROM ZUCCHINI: REDUCED-, PEROXIDE-, AND AZIDE-FORMS

• PDB DOI: https://doi.org/10.2210/pdb1ASQ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Cucurbita pepo var. melopepo
• Mutation(s): No 


• Deposited: 1992-11-25 Released: 1994-01-31 
• Deposition Author(s): Messerschmidt, A., Luecke, H., Huber, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.32 Å
• R-Value Work: 0.178 
• R-Value Observed: 0.178 

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)

Biological Assembly 2  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 124.75 kDa 
• Atom Count: 9,753 
• Modelled Residue Count: 1,104 
• Deposited Residue Count: 1,104 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ASCORBATE OXIDASE	A, B	552	Cucurbita pepo var. melopepo	Mutation(s): 0  EC: 1.10.3.3
UniProt
Find proteins for P37064 (Cucurbita pepo var. melopepo) Explore P37064  Go to UniProtKB:  P37064

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	C [auth A], L [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
CU	D [auth A], E [auth A], F [auth A], G [auth A], K [auth A], M [auth B], N [auth B], O [auth B], P [auth B]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N
AZI	I [auth A], J [auth A], R [auth B], S [auth B]	AZIDE ION N3 IVRMZWNICZWHMI-UHFFFAOYSA-N
OH	H [auth A], Q [auth B]	HYDROXIDE ION H O XLYOFNOQVPJJNP-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.32 Å
• R-Value Work: 0.178 
• R-Value Observed: 0.178 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 106.32	α = 90
b = 105.28	β = 90
c = 113	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-01-31 
Deposition Author(s): Messerschmidt, A., Luecke, H., Huber, R.

Revision History  

• Version 1.0: 1994-01-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary