Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.31 kDa 
• Atom Count: 2302 
• Modelled Residue Count: 258 
• Deposited Residue Count: 259 
• Unique protein chains: 1

1RZE

X-RAY ANALYSIS OF METAL SUBSTITUTED HUMAN CARBONIC ANHYDRASE II DERIVATIVES

• PDB DOI: 10.2210/pdb1RZE/pdb

• Classification: LYASE(OXO-ACID)
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1993-05-25 Released: 1993-10-31 
• Deposition Author(s): Hakansson, K., Wehnert, A., Liljas, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Observed: 0.150 

Literature

X-ray analysis of metal-substituted human carbonic anhydrase II derivatives.

Hakansson, K., Wehnert, A., Liljas, A.

(1994) Acta Crystallogr D Biol Crystallogr 50: 93-100

• PubMed: 15299481 
• DOI: 10.1107/S0907444993008790
• Primary Citation of Related Structures:  
  1RZA, 1RZB, 1RZC, 1RZD, 1RZE


• PubMed Abstract: 
  

Metal-substituted crystals of human carbonic anhydrase II belonging to space group P2(1) with cell dimensions a = 42.7, b = 41.7, c = 73.0 A and beta = 104.6 degrees were analyzed crystallographically. The resolution limit ranged from 1.82 to 1.92 A with high completeness (86.2-90.7%). Cobalt(II)-substituted carbonic anhydrase has a tetrahedral coordination around the metal both at pH 6 and pH 7.8, similar to the native zinc enzyme. In contrast, the catalytically inactive copper(II), nickel(II) and manganese(II) derivatives showed increased coordination number around the metal ion. Whereas the copper is best described as penta-coordinated, the nickel and manganese are best described as hexa-coordinated. The results are briefly compared with spectroscopic observations and our current view on carbonic anhydrase catalysis.

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Related Citations: 

• Structure of Native and Apo Carbonic Anhydrase II and Structure of Some of its Anion-Ligand Complexes
  Hakansson, K., Carlsson, M., Svensson, L.A., Liljas, A.
  (1992) J Mol Biol 227: 1192

• Structure of Cobalt Carbonic Anhydrase Complexed with Bicarbonate
  Hakansson, K., Wehnert, A.
  (1992) J Mol Biol 228: 1212

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Organizational Affiliation: 

Molecular Biophysics, Chemical Center, University of Lund, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBONIC ANHYDRASE II	A	259	Homo sapiens	Mutation(s): 0  Gene Names: CA2 EC: 4.2.1.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens) Explore P00918  Go to UniProtKB:  P00918
PHAROS:  P00918

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NI	B [auth A]	NICKEL (II) ION Ni VEQPNABPJHWNSG-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
SO4	BindingDB:  1RZE	Ki: min: 8.90e+7, max: 3.00e+8 (nM) from 4 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Observed: 0.150 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.7	α = 90
b = 41.7	β = 104.6
c = 73	γ = 90

Software Package:

Software Name	Purpose
PROFFT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-05-25 
• Released Date: 1993-10-31 
Deposition Author(s): Hakansson, K., Wehnert, A., Liljas, A.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other