PDBsum entry 2hkk

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Lyase PDB id
Protein chain
256 a.a. *
Waters ×192
* Residue conservation analysis
PDB id:
Name: Lyase
Title: Carbonic anhydrase activators: solution and x-ray crystallog the interaction of andrenaline with various carbonic anhydr isoforms
Structure: Carbonic anhydrase 2. Chain: a. Synonym: carbonic anhydrase ii, carbonate dehydratase ii, c carbonic anhydrasE C. Ec:
Source: Homo sapiens. Human. Organism_taxid: 9606
1.90Å     R-factor:   0.188     R-free:   0.233
Authors: C.Temperini,A.Innocenti,D.Vullo,A.Scozzafava,C.T.Supuran
Key ref: C.Temperini et al. (2007). Carbonic anhydrase activators: L-Adrenaline plugs the active site entrance of isozyme II, activating better isoforms I, IV, VA, VII, and XIV. Bioorg Med Chem Lett, 17, 628-635. PubMed id: 17127057 DOI: 10.1016/j.bmcl.2006.11.027
05-Jul-06     Release date:   22-May-07    
Go to PROCHECK summary

Protein chain
Pfam   ArchSchema ?
P00918  (CAH2_HUMAN) -  Carbonic anhydrase 2
260 a.a.
256 a.a.
Key:    PfamA domain  Secondary structure  CATH domain

 Enzyme reactions 
   Enzyme class: E.C.  - Carbonate dehydratase.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]
      Reaction: H2CO3 = CO2 + H2O
= CO(2)
+ H(2)O
      Cofactor: Zn(2+)
Molecule diagrams generated from .mol files obtained from the KEGG ftp site
 Gene Ontology (GO) functional annotation 
  GO annot!
  Cellular component     extracellular space   11 terms 
  Biological process     angiotensin-mediated signaling pathway   22 terms 
  Biochemical function     protein binding     5 terms  


    Added reference    
DOI no: 10.1016/j.bmcl.2006.11.027 Bioorg Med Chem Lett 17:628-635 (2007)
PubMed id: 17127057  
Carbonic anhydrase activators: L-Adrenaline plugs the active site entrance of isozyme II, activating better isoforms I, IV, VA, VII, and XIV.
C.Temperini, A.Innocenti, A.Scozzafava, A.Mastrolorenzo, C.T.Supuran.
The activation of the metalloenzyme carbonic anhydrase (CA, EC 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.

Literature references that cite this PDB file's key reference

  PubMed id Reference
20118557 A.Sugimoto, H.Ikeda, H.Tsukamoto, K.Kihira, M.Ishioka, J.Hirose, T.Hata, H.Fujioka, and Y.Ono (2010).
Timolol Activates the Enzyme Activities of Human Carbonic Anhydrase I and II.
  Biol Pharm Bull, 33, 301-306.  
20629007 J.Schulze Wischeler, A.Innocenti, D.Vullo, A.Agrawal, S.M.Cohen, A.Heine, C.T.Supuran, and G.Klebe (2010).
Bidentate Zinc chelators for alpha-carbonic anhydrases that produce a trigonal bipyramidal coordination geometry.
  ChemMedChem, 5, 1609-1615.
PDB code: 3m1k
18167490 C.T.Supuran (2008).
Carbonic anhydrases: novel therapeutic applications for inhibitors and activators.
  Nat Rev Drug Discov, 7, 168-181.  
18335973 V.M.Krishnamurthy, G.K.Kaufman, A.R.Urbach, I.Gitlin, K.L.Gudiksen, D.B.Weibel, and G.M.Whitesides (2008).
Carbonic anhydrase as a model for biophysical and physical-organic studies of proteins and protein-ligand binding.
  Chem Rev, 108, 946.  
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