4G7A

The crystal structure of an alpha Carbonic Anhydrase from the extremophilic bacterium Sulfurihydrogenibium yellowstonense YO3AOP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

X-ray structure of the first `extremo-{alpha}-carbonic anhydrase', a dimeric enzyme from the thermophilic bacterium Sulfurihydrogenibium yellowstonense YO3AOP1.

Di Fiore, A.Capasso, C.De Luca, V.Monti, S.M.Carginale, V.Supuran, C.T.Scozzafava, A.Pedone, C.Rossi, M.De Simone, G.

(2013) Acta Crystallogr.,Sect.D 69: 1150-1159

  • DOI: 10.1107/S0907444913007208
  • Also Cited By: 4X5S

  • PubMed Abstract: 
  • SspCA, a novel `extremo-α-carbonic anhydrase' isolated from the thermophilic bacterium Sulfurihydrogenibium yellowstonense YO3AOP1, is an efficient catalyst for the hydration of CO2 and presents exceptional thermostability. Indeed, SspCA retains a hi ...

    SspCA, a novel `extremo-α-carbonic anhydrase' isolated from the thermophilic bacterium Sulfurihydrogenibium yellowstonense YO3AOP1, is an efficient catalyst for the hydration of CO2 and presents exceptional thermostability. Indeed, SspCA retains a high catalytic activity even after being heated to 343-373 K for several hours. Here, the crystallographic structure of this α-carbonic anhydrase (α-CA) is reported and the factors responsible for its function at high temperature are elucidated. In particular, the study suggests that increased structural compactness, together with an increased number of charged residues on the protein surface and a greater number of ionic networks, seem to be the key factors involved in the higher thermostability of this enzyme with respect to its mesophilic homologues. These findings are of extreme importance, since they provide a structural basis for the understanding of the mechanisms responsible for thermal stability in the α-CA family for the first time. The data obtained offer a tool that can be exploited to engineer α-CAs in order to obtain enzymes with enhanced thermostability for use in the harsh conditions of the CO2 capture and sequestration processes.


    Organizational Affiliation

    Istituto di Biostrutture e Bioimmagini - CNR, Via Mezzocannone 16, 80134 Napoli, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonate dehydratase
A, B
248Sulfurihydrogenibium sp. (strain YO3AOP1)Mutation(s): 0 
EC: 4.2.1.1
Find proteins for B2V8E3 (Sulfurihydrogenibium sp. (strain YO3AOP1))
Go to UniProtKB:  B2V8E3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
AZM
Query on AZM

Download SDF File 
Download CCD File 
A, B
5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE
C4 H6 N4 O3 S2
BZKPWHYZMXOIDC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 48.500α = 90.00
b = 68.360β = 106.03
c = 74.690γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
CNSrefinement
CrystalCleardata collection
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-29
    Type: Initial release
  • Version 1.1: 2013-06-19
    Type: Database references