Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29536.96 
• Atom Count: 2085 
• Residue Count: 259 
• Unique protein chains: 1

1BIC

CRYSTALLOGRAPHIC ANALYSIS OF THR-200-> HIS HUMAN CARBONIC ANHYDRASE II AND ITS COMPLEX WITH THE SUBSTRATE, HCO3-

• DOI: 10.2210/pdb1BIC/pdb

• Classification: LYASE(OXO-ACID)
• Organism(s): Homo sapiens


• Deposited: 1992-09-01 Released: 1993-10-31 
• Deposition Author(s): Xue, Y., Vidgren, J., Svensson, L.A., Liljas, A., Jonsson, B.-H., Lindskog, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å

Literature

Crystallographic analysis of Thr-200-->His human carbonic anhydrase II and its complex with the substrate, HCO3-.

Xue, Y., Vidgren, J., Svensson, L.A., Liljas, A., Jonsson, B.H., Lindskog, S.

(1993) Proteins 15: 80-87

• PubMed: 8451242 
• DOI: 10.1002/prot.340150110


• PubMed Abstract: 
  

A complex of carbonic anhydrase (CA) with one of its substrates, bicarbonate, has been studied crystallographically. Human isoenzyme II was mutated at position 200 from threonine to histidine, which results in higher affinity for bicarbonate. The HCO3- ion binds in the active site to the zinc ion as a pseudo-bidentate ligand which gives the metal a coordination geometry between tetrahedral and trigonal bipyramide. The water/hydroxide normally bound with tetrahedral coordination to the zinc is probably replaced by the OH group of the bicarbonate ion. The importance of residues Thr-199 and Glu-106 in controlling the binding orientation of HCO3- is discussed as well as the catalytic mechanism. Both the complex as well as the uncomplexed mutant were studied at 1.9 A resolution.

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Organizational Affiliation: 

Department of Biochemistry, University of Umeå, Sweden.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CARBONIC ANHYDRASE II	A	259	Homo sapiens	Mutation(s): 0  Gene Names: CA2 EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens) Go to Gene View: CA2 Go to UniProtKB:  P00918

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
MMC	A	METHYL MERCURY ION C H3 Hg DBUXSCUEGJMZAE-UHFFFAOYSA-N
BCT	A	BICARBONATE ION C H O3 BVKZGUZCCUSVTD-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 42.700	α = 90.00
b = 41.700	β = 104.60
c = 73.000	γ = 90.00

Software Package:

Software Name	Purpose
PROFFT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1992-09-01 
• Released Date: 1993-10-31 
• Deposition Author(s): Xue, Y., Vidgren, J., Svensson, L.A., Liljas, A., Jonsson, B.-H., Lindskog, S.

Revision History 

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