ISDA: 2HKK

Deposition Date 2006-07-05

Release Date 2007-05-22

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2HKK

Keywords:

LYASE

Title:

Carbonic anhydrase activators: Solution and X-ray crystallography for the interaction of andrenaline with various carbonic anhydrase isoforms

Biological Source:

Source Organism(s):

Homo sapiens (Taxon ID: 9606)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.23

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 1 21 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Carbonic anhydrase 2
Gene (Uniprot):CA2
Chain IDs:A
Chain Length:260
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P00918 Pfam ID:PF00194 EC:4.2.1.1

Ligand Molecules

ALE

Primary Citation

Carbonic anhydrase activators: L-Adrenaline plugs the active site entrance of isozyme II, activating better isoforms I, IV, VA, VII, and XIV.

Temperini, C, Innocenti, A, Scozzafava, A, Mastrolorenzo, A, Supuran, C.T.Show

Bioorg.Med.Chem.Lett. 17 628 635 (2007)

PMID: 17127057 DOI: 10.1016/j.bmcl.2006.11.027

Abstact

The activation of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1) with L-adrenaline and histamine has been investigated by kinetic and X-ray crystallographic studies. L-Adrenaline behaves as a potent activator of isozyme CA I (activation constant of 90 nM), being a much weaker activator of isozyme CA II (activation constant of 96 microM). Isoforms CA IV, VA, VII, and XIV were activated by L-adrenaline with K(A)s in the range of 36-63 microM. The X-ray crystal structure of the CA II-L-adrenaline adduct revealed that the activator plugs the entrance of the active site cavity, obstructing it almost completely.

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Primary Citation of related structures

Abstact

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