2IUO

Site Directed Mutagenesis of Key Residues Involved in the Catalytic Mechanism of Cyanase

• PDB DOI: https://doi.org/10.2210/pdb2IUO/pdb

• Classification: LYASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-06-06 Released: 2006-06-08 
• Deposition Author(s): Guilloton, M., Walsh, M.A., Joachimiak, A., Anderson, M.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.208 
• R-Value Work: 0.149 
• R-Value Observed: 0.152 

Starting Model: experimental

Literature

A Twin Set of Low Pka Arginines Ensures the Concerted Acid Base Catalytic Mechanism of Cyanase

Guilloton, M., Walsh, M.A., Joachimiak, A., Anderson, P.M.

To be published.

Biological Assembly 1  

Global Symmetry: Dihedral - D5  (Explore in 3D)
Global Stoichiometry: Homo 10-mer - A10 

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

Macromolecule Content

• Total Structure Weight: 173.78 kDa 
• Atom Count: 14,230 
• Modelled Residue Count: 1,560 
• Deposited Residue Count: 1,560 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYANATE HYDRATASE	A, B, C, D, E, F, G, H, I, J	156	Escherichia coli	Mutation(s): 1  EC: 4.2.1.104
UniProt
Find proteins for P00816 (Escherichia coli (strain K12)) Explore P00816  Go to UniProtKB:  P00816

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	AA [auth D], AB [auth J], BA [auth D], BB [auth J], EA [auth E], FA [auth E], GA [auth E], JA [auth F], KA [auth F], M [auth A], N [auth A], NA [auth G], OA [auth G], Q [auth B], R [auth B], RA [auth H], SA [auth H], V [auth C], VA [auth I], W [auth C], WA [auth I], Z [auth D], ZA [auth J]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
BR	CA [auth E], HA [auth F], K [auth A], LA [auth G], O [auth B], PA [auth H], T [auth C], TA [auth I], X [auth D], XA [auth J]	BROMIDE ION Br CPELXLSAUQHCOX-UHFFFAOYSA-M
AZI	S [auth B]	AZIDE ION N3 IVRMZWNICZWHMI-UHFFFAOYSA-N
CL	DA [auth E], IA [auth F], L [auth A], MA [auth G], P [auth B], QA [auth H], U [auth C], UA [auth I], Y [auth D], YA [auth J]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.208 
• R-Value Work: 0.149 
• R-Value Observed: 0.152 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.6	α = 70.02
b = 80.75	β = 71.81
c = 82.28	γ = 66.34

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-06-08 
Deposition Author(s): Guilloton, M., Walsh, M.A., Joachimiak, A., Anderson, M.P.

Revision History  

• Version 1.0: 2006-06-08
  Type: Initial release
  
• Version 1.1: 2014-02-05
  Changes: Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance
• Version 1.2: 2019-05-08
  Changes: Data collection, Experimental preparation, Other
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description