5ECU

The unliganded structure of Caldicellulosiruptor saccharolyticus GH5

• PDB DOI: https://doi.org/10.2210/pdb5ECU/pdb

• Classification: HYDROLASE
• Organism(s): Caldicellulosiruptor saccharolyticus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-10-20 Released: 2016-11-02 
• Deposition Author(s): Alahuhta, P.M., Lunin, V.V.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.115 
• R-Value Work: 0.085 
• R-Value Observed: 0.087 

Starting Model: experimental

Literature

The structure of Caldicellulosiruptor saccharolyticus GH5

Alahuhta, P.M., Lunin, V.V.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 65.57 kDa 
• Atom Count: 3,596 
• Modelled Residue Count: 350 
• Deposited Residue Count: 555 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cellulase	A	555	Caldicellulosiruptor saccharolyticus	Mutation(s): 0  Gene Names: Csac_0678 EC: 3.2.1.4
UniProt
Find proteins for A4XHB2 (Caldicellulosiruptor saccharolyticus (strain ATCC 43494 / DSM 8903 / Tp8T 6331)) Explore A4XHB2  Go to UniProtKB:  A4XHB2

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MLI	HA [auth A], IA [auth A], JA [auth A]	MALONATE ION C3 H2 O4 OFOBLEOULBTSOW-UHFFFAOYSA-L
GOL	AA [auth A], BA [auth A], CA [auth A], DA [auth A], EA [auth A], FA [auth A], GA [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A], S [auth A], T [auth A], U [auth A], V [auth A], W [auth A], X [auth A], Y [auth A], Z [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
ACT	KA [auth A], LA [auth A], MA [auth A], NA [auth A], OA [auth A], PA [auth A], QA [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CA	RA [auth A], SA [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.115 
• R-Value Work: 0.085 
• R-Value Observed: 0.087 
• Space Group: I 2 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 146.66	α = 90
b = 146.66	β = 90
c = 146.66	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
Blu-Ice	data collection
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2016-11-02 
Deposition Author(s): Alahuhta, P.M., Lunin, V.V.

Revision History  

• Version 1.0: 2016-11-02
  Type: Initial release
  
• Version 1.1: 2017-02-15
  Changes: Derived calculations
• Version 1.2: 2023-09-27
  Changes: Data collection, Database references, Derived calculations, Refinement description