5LA2

The mechanism by which arabinoxylanases can recognise highly decorated xylans

• PDB DOI: https://doi.org/10.2210/pdb5LA2/pdb

• Classification: HYDROLASE
• Organism(s): Acetivibrio thermocellus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2016-06-13 Released: 2016-08-31 
• Deposition Author(s): Basle, A., Labourel, A., Cuskin, F., Jackson, A., Crouch, L., Rogowski, A., Gilbert, H.
• Funding Organization(s): Biotechnology and Biological Sciences Research Council

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.199 
• R-Value Work: 0.146 
• R-Value Observed: 0.149 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 110.13 kDa 
• Atom Count: 8,373 
• Modelled Residue Count: 929 
• Deposited Residue Count: 982 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carbohydrate binding family 6	A, B	491	Acetivibrio thermocellus	Mutation(s): 0  Gene Names: Cther_1146
UniProt
Find proteins for A3DHG6 (Acetivibrio thermocellus (strain ATCC 27405 / DSM 1237 / JCM 9322 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)) Explore A3DHG6  Go to UniProtKB:  A3DHG6

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-xylopyranose-(1-4)-beta-D-xylopyranose-(1-4)-beta-D-xylopyranose-(1-4)-[alpha-L-arabinofuranose-(1-3)]alpha-D-xylopyranose	C, D	5		N/A
Glycosylation Resources
GlyTouCan:  G52751IP GlyCosmos:  G52751IP

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ARB	E [auth A], I [auth B]	beta-L-arabinopyranose C5 H10 O5 SRBFZHDQGSBBOR-KLVWXMOXSA-N
CA	F [auth A], G [auth A], H [auth A], J [auth B], K [auth B], L [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.199 
• R-Value Work: 0.146 
• R-Value Observed: 0.149 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.273	α = 90
b = 123.176	β = 90
c = 125.38	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
MOLREP	phasing
XDS	data reduction
XDS	data scaling

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2016-08-31 
Deposition Author(s): Basle, A., Labourel, A., Cuskin, F., Jackson, A., Crouch, L., Rogowski, A., Gilbert, H.

---

Funding Organization	Location	Grant Number
Biotechnology and Biological Sciences Research Council	United Kingdom	BB/K020358/1

Revision History  

• Version 1.0: 2016-08-31
  Type: Initial release
  
• Version 1.1: 2016-10-26
  Changes: Database references
• Version 1.2: 2017-08-30
  Changes: Author supporting evidence
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2024-01-10
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary