1HCA | pdb_00001hca

UNEXPECTED PH-DEPENDENT CONFORMATION OF HIS-64, THE PROTON SHUTTLE OF CARBONIC ANHYDRASE II.

• PDB DOI: https://doi.org/10.2210/pdb1HCA/pdb

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


• Deposited: 1992-04-02 Released: 1992-10-15 
• Deposition Author(s): Nair, S.K., Christianson, D.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Observed: 
  0.164 (Depositor) 

Literature

Unexpected Ph-Dependent Conformation of His-64, the Proton Shuttle of Carbonic Anhydrase II.

Nair, S.K., Christianson, D.W.

(1991) J Am Chem Soc 113: 9455-9458

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 29.56 kDa 
• Atom Count: 2,109 
• Modeled Residue Count: 255 
• Deposited Residue Count: 260 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBONIC ANHYDRASE II	A	260	Homo sapiens	Mutation(s): 0  EC: 4.2.1.1 (PDB Primary Data), 4.2.1.69 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens) Explore P00918  Go to UniProtKB:  P00918
PHAROS:  P00918 GTEx:  ENSG00000104267

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HG	C [auth A]	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Observed: 0.164 (Depositor) 

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
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1992-10-15 
Deposition Author(s): Nair, S.K., Christianson, D.W.

Revision History  

• Version 1.0: 1992-10-15
  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
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Derived calculations