3ZXK

Engineering the active site of a GH43 glycoside hydrolase generates a biotechnologically significant enzyme that displays both endo- xylanase and exo-arabinofuranosidase activity

• PDB DOI: https://doi.org/10.2210/pdb3ZXK/pdb

• Classification: HYDROLASE
• Organism(s): Humicola insolens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-08-11 Released: 2012-04-18 
• Deposition Author(s): McKee, L.S., Pena, M.J., Rogowski, A., Jackson, A., Lewis, R.J., York, W.S., Krogh, K.B.R.M., Vikso-Nielsen, A., Skjot, M., Gilbert, H.J., Marles-Wright, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.44 Å
• R-Value Free: 0.207 
• R-Value Work: 0.166 
• R-Value Observed: 0.169 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 122.64 kDa 
• Atom Count: 9,502 
• Modelled Residue Count: 1,060 
• Deposited Residue Count: 1,084 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HIAXHD3	A, B	542	Humicola insolens	Mutation(s): 0  EC: 3.2.1.55

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-L-arabinofuranose-(1-2)-[beta-D-xylopyranose-(1-4)]beta-D-xylopyranose-(1-4)-beta-D-xylopyranose	C, D	4		N/A
Glycosylation Resources
GlyTouCan:  G66660EL GlyCosmos:  G66660EL

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EPE	E [auth A], F [auth B]	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.44 Å
• R-Value Free: 0.207 
• R-Value Work: 0.166 
• R-Value Observed: 0.169 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.38	α = 90
b = 52.97	β = 101.69
c = 146.87	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-04-18 
Deposition Author(s): McKee, L.S., Pena, M.J., Rogowski, A., Jackson, A., Lewis, R.J., York, W.S., Krogh, K.B.R.M., Vikso-Nielsen, A., Skjot, M., Gilbert, H.J., Marles-Wright, J.

Revision History  

• Version 1.0: 2012-04-18
  Type: Initial release
  
• Version 1.1: 2012-05-02
  Changes: Other
• Version 1.2: 2018-04-04
  Changes: Data collection
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary
• Version 2.1: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary