6MBV | pdb_00006mbv

Carbonic Anhydrase II in complex with Nicotinic Acid

• PDB DOI: https://doi.org/10.2210/pdb6MBV/pdb

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


• Deposited: 2018-08-30 Released: 2019-03-13 
• Deposition Author(s): Lomelino, C.L., McKenna, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.177 (Depositor), 0.182 (DCC) 
• R-Value Work: 
  0.152 (Depositor), 0.152 (DCC) 
• R-Value Observed: 
  0.153 (Depositor) 

Starting Model: experimental

Literature

Carbonic anhydrase II in complex with carboxylic acid-based inhibitors.

Lomelino, C.L., McKenna, R.

(2019) Acta Crystallogr F Struct Biol Commun 75: 166-170

• PubMed: 30839290 
• DOI: https://doi.org/10.1107/S2053230X18018344
• Primary Citation Related Structures: 
  6MBV, 6MBY


• PubMed Abstract: 
  

  Carbonic anhydrases (CAs) are molecular targets in various diseases. While many sulfonamide-based drugs are in clinical use, CA inhibitor design is moving towards the incorporation of alternative zinc-binding groups, such as carboxylic acids, to promote CA isoform-specific inhibition. Here, X-ray crystal structures of CA II in complex with nicotinic acid and ferulic acid determined to 1.70 and 1.50 Å resolution, respectively, are reported. Furthermore, the structures of these two compounds are superimposed with previously determined structures to compare the mechanisms of inhibition and the properties of carboxylic acid-based CA inhibitors. This study examines an important class of alternative, non-sulfonamide-based CA inhibitors and provides insight to facilitate the structure-guided design of CA isoform-specific inhibitors.

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Organizational Affiliation: 
• Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida, Gainesville, FL 32610, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 29.21 kDa 
• Atom Count: 2,209 
• Modeled Residue Count: 257 
• Deposited Residue Count: 257 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carbonic anhydrase 2	A	257	Homo sapiens	Mutation(s): 0  Gene Names: CA2 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 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NIO	C [auth A]	NICOTINIC ACID C6 H5 N O2 PVNIIMVLHYAWGP-UHFFFAOYSA-N
GOL	D [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.177 (Depositor), 0.182 (DCC) 
• R-Value Work:  0.152 (Depositor), 0.152 (DCC) 
• R-Value Observed: 0.153 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.078	α = 90
b = 41.139	β = 104.27
c = 71.761	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-03-13 
Deposition Author(s): Lomelino, C.L., McKenna, R.

Revision History  

• Version 1.0: 2019-03-13
  Type: Initial release
  
• Version 1.1: 2023-10-11
  Changes: Data collection, Database references, Refinement description