ISDA

Entry Detail

PDB ID:

4X5S

Keywords:

LYASE

Title:

The crystal structure of an alpha carbonic anhydrase from the extremophilic bacterium Sulfurihydrogenibium azorense.

Biological Source:

Source Organism:

Sulfurihydrogenibium azorense

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2014-12-05

Release Date:

2015-05-20

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.95 Å

R-Value Free:

0.21

R-Value Work:

0.18

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Carbonic anhydrase (Carbonate dehydratase)
Chain IDs:A, B
Chain Length:232
Number of Molecules:2
Biological Source:Sulfurihydrogenibium azorense

UniProt ID:C1DTU5 Pfam ID:PF00194 EC:4.2.1.1

Ligand Molecules

AZM

PE8

Primary Citation

Crystal structure of the most catalytically effective carbonic anhydrase enzyme known, SazCA from the thermophilic bacterium Sulfurihydrogenibium azorense.

De Simone, G, Monti, S.M, Alterio, V, Buonanno, M, De Luca, V, Rossi, M, Carginale, V, Supuran, C.T, Capasso, C, Di Fiore, A, 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.Show

Bioorg.Med.Chem.Lett. 25 2002 2006 (2015)

PMID: 25817590 DOI: 10.1016/j.bmcl.2015.02.068

Abstact

Two thermostable α-carbonic anhydrases (α-CAs) isolated from thermophilic Sulfurihydrogenibium spp., namely SspCA (from S. yellowstonensis) and SazCA (from S. azorense), were shown in a previous work to possess interesting complementary properties. SspCA was shown to have an exceptional thermal stability, whereas SazCA demonstrated to be the most active α-CA known to date for the CO2 hydration reaction. Here we report the crystallographic structure of SazCA and the identification of the structural features responsible for its high catalytic activity, by comparing it with SspCA structure. These data are of relevance for the design of engineered proteins showing higher stability and catalytic activity than other α-CAs known to date.

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