4OYO image
Deposition Date 2014-02-12
Release Date 2014-04-02
Last Version Date 2024-10-23
Entry Detail
PDB ID:
4OYO
Keywords:
Title:
Human solAC Complexed with 4-(2-Chlorophenyl)-3-methyl-1H-pyrazole
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.75 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 63
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Adenylate cyclase type 10
Gene (Uniprot):ADCY10
Chain IDs:A
Chain Length:470
Number of Molecules:1
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CME A CYS modified residue
Primary Citation
Crystal structure of human soluble adenylate cyclase reveals a distinct, highly flexible allosteric bicarbonate binding pocket.
Chemmedchem 9 823 832 (2014)
PMID: 24616449 DOI: 10.1002/cmdc.201300480

Abstact

Soluble adenylate cyclases catalyse the synthesis of the second messenger cAMP through the cyclisation of ATP and are the only known enzymes to be directly activated by bicarbonate. Here, we report the first crystal structure of the human enzyme that reveals a pseudosymmetrical arrangement of two catalytic domains to produce a single competent active site and a novel discrete bicarbonate binding pocket. Crystal structures of the apo protein, the protein in complex with α,β-methylene adenosine 5'-triphosphate (AMPCPP) and calcium, with the allosteric activator bicarbonate, and also with a number of inhibitors identified using fragment screening, all show a flexible active site that undergoes significant conformational changes on binding of ligands. The resulting nanomolar-potent inhibitors that were developed bind at both the substrate binding pocket and the allosteric site, and can be used as chemical probes to further elucidate the function of this protein.

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Primary Citation of related structures