Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 175.12 kDa 
• Atom Count: 14,178 
• Modelled Residue Count: 1,560 
• Deposited Residue Count: 1,560 
• Unique protein chains: 1

 1DW9

Structure of cyanase reveals that a novel dimeric and decameric arrangement of subunits is required for formation of the enzyme active site

• PDB DOI: 10.2210/pdb1DW9/pdb

• Classification: LYASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-12-03 Released: 2000-05-16 
• Deposition Author(s): Walsh, M.A., Otwinowski, Z., Perrakis, A., Anderson, P.M., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.189 
• R-Value Work: 0.150 

Literature

Structure of Cyanase Reveals that a Novel Dimeric and Decameric Arrangement of Subunits is Required for Formation of the Enzyme Active Site

Walsh, M.A., Otwinowski, Z., Perrakis, A., Anderson, P.M., Joachimiak, A.

(2000) Structure 8: 505

• PubMed: 10801492 
• DOI: 10.1016/s0969-2126(00)00134-9
• Primary Citation of Related Structures:  
  1DW9, 1DWK


• PubMed Abstract: 
  

Cyanase is an enzyme found in bacteria and plants that catalyzes the reaction of cyanate with bicarbonate to produce ammonia and carbon dioxide. In Escherichia coli, cyanase is induced from the cyn operon in response to extracellular cyanate. The enzyme is functionally active as a homodecamer of 17 kDa subunits, and displays half-site binding of substrates or substrate analogs. The enzyme shows no significant amino acid sequence homology with other proteins.

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Related Citations: 

• Characterization of High-Level Expression and Sequencing of the Escherichia Coli K-12 Cyns Gene Encoding Cyanase
  Sung, Y., Anderson, P.M., Fuchs, J.A.
  (1987) J Bacteriol 169: 5224

• Kinetic Properties of Cyanase
  Anderson, P.M., Little, R.M.
  (1986) Biochemistry 25: 1621

• Interaction of Mono- and Dianions with Cyanase: Evidence for Apparent Half-Site Binding
  Anderson, P.M., Johnson, W.V., Endrizzi, J.A., Little, R.M., Korte, J.J.
  (1986) Biochemistry 26: 3938

• Purification and Properties of the Inducible Enzyme Cyanase
  Anderson, P.M.
  (1980) Biochemistry 19: 2882

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Organizational Affiliation: 

Biosciences Division/Structural Biology Center, Argonne National Laboratory, Argonne, IL 60439, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYANATE LYASE	A, B, C, D, E, F, G, H, I, J	156	Escherichia coli	Mutation(s): 0  EC: 4.3.99.1 (PDB Primary Data), 4.2.1.104 (UniProt)
UniProt
Find proteins for P00816 (Escherichia coli (strain K12)) Explore P00816  Go to UniProtKB:  P00816

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	BA [auth F], CA [auth F], EA [auth G], FA [auth G], HA [auth H], IA [auth H], JA [auth H], L [auth A], LA [auth I], M [auth A], MA [auth I], O [auth B], OA [auth J], P [auth B], PA [auth J], QA [auth J], R [auth C], T [auth D], U [auth D], V [auth D], X [auth E], Y [auth E], Z [auth E]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	AA [auth F], DA [auth G], GA [auth H], K [auth A], KA [auth I], N [auth B], NA [auth J], Q [auth C], S [auth D], W [auth E]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C, D, E, F, G, H, I, J	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.189 
• R-Value Work: 0.150 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.34	α = 70.3
b = 81.03	β = 72.2
c = 82.3	γ = 66.4

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-05-16 
Deposition Author(s): Walsh, M.A., Otwinowski, Z., Perrakis, A., Anderson, P.M., Joachimiak, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2000-05-16
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Atomic model, Version format compliance
• Version 1.2: 2011-09-28
  Changes: Atomic model, Derived calculations, Non-polymer description, Other, Refinement description
• Version 1.3: 2019-05-08
  Changes: Data collection, Derived calculations, Experimental preparation, Other
• Version 1.4: 2019-08-21
  Changes: Data collection, Database references