Biological Assembly 1  

 3D View: Structure | 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: 28854.43 
• Atom Count: 2010 
• Residue Count: 260 
• Unique protein chains: 1

2CAB

STRUCTURE, REFINEMENT AND FUNCTION OF CARBONIC ANHYDRASE ISOZYMES. REFINEMENT OF HUMAN CARBONIC ANHYDRASE I

• DOI: 10.2210/pdb2CAB/pdb
• Entry 2CAB supersedes 1CAB

• Classification: HYDRO-LYASE
• Organism(s): Homo sapiens


• Deposited: 1983-10-05 Released: 1984-02-02 
• Deposition Author(s): Kannan, K.K., Ramanadham, M., Jones, T.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Work: 0.193 

Literature

Structure, refinement, and function of carbonic anhydrase isozymes: refinement of human carbonic anhydrase I

Kannan, K.K., Ramanadham, M., Jones, T.A.

(1984) Ann.N.Y.Acad.Sci. 429: 49-60

• PubMed: 6430186 


• PubMed Abstract: 
  

The structure of human erythrocyte carbonic anhydrase I has been refined to a final R value of 19% to 2-A resolution by a combination of least squares refinement and model fitting in a three-dimensional graphics display. About 300 solvent atoms have been located bound to the protein molecule. An interesting hydrogen bond network involving Zn2+, the liganded solvent, side chain groups of Thr-199, Glu-106, Thr-7, and His-64 through two solvent molecules have been found that may be important for the catalytic mechanism of the carbonic anhydrase.

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Related Citations: 

• Structure, Refinement, and Function of Human Carbonic Anhydrase-B
  Kannan, K.K.,Ramanadham, M.
  (1981) Int.J.Quantum Chem.Quantum Chem.Symp. 20: 199
• Crystal Structure of Human Erythrocyte Carbonic Anhydrase B, Three-Dimensional Structure at a Nominal 2.2 Angstroms Resolution
  Kannan, K.K.,Notstrand, B.,Fridborg, K.,Lovgren, S.,Ohlsson, A.,Petef, M.
  (1975) Proc.Natl.Acad.Sci.USA 72: 51
• Structure and Function of Carbonic Anhydrases. Imidazole Binding to Human Carbonic Anhydrace B and the Mechanism of Action of Carbonic Anhydrases
  Kannan, K.K.,Petef, M.,Fridborg, K.,Cid-Dresdner, H.,Lovgren, S.
  (1977) FEBS Lett. 73: 115
• Structure and Function of Carbonic Anhydrases
  Kannan, K.K.
  (1980) Biomolecular Structure, Conformation, Function and Evolution 1: 165
• Crystal Structure of Carbonic Anhydrase
  Kannan, K.K.
  (1980) Biophysics and Physiology of Carbon Dioxide --: 184
• Structural Relationship of Human Erythrocyte Carbonic Anhydrase Isozymes B and C
  Notstrand, B.,Vaara, I.,Kannan, K.K.
  (1975) Isozymes-Molecular Structure 1: 575

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CARBONIC ANHYDRASE FORM B	A	260	Homo sapiens	Mutation(s): 0  Gene Names: CA1 EC: 4.2.1.1
Find proteins for P00915 (Homo sapiens) Go to Gene View: CA1 Go to UniProtKB:  P00915

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Work: 0.193 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 81.500	α = 90.00
b = 73.600	β = 90.00
c = 37.100	γ = 90.00

Software Package:

Software Name	Purpose
CORELS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1983-10-05 
• Released Date: 1984-02-02 
• Deposition Author(s): Kannan, K.K., Ramanadham, M., Jones, T.A.
• This entry supersedes: 1CAB

Revision History 

• Version 1.0: 1984-02-02
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-11-29
  Type: Derived calculations, Other