6CPU

Crystal structure of yeast caPDE2

Summary for 6CPU

• Entry DOI: 10.2210/pdb6cpu/pdb
• Descriptor: Phosphodiesterase, ZINC ION, MAGNESIUM ION, ... (4 entities in total)
• Functional Keywords: yeast phosphodiesterase-2, hydrolase
• Biological source: Candida albicans (Yeast)
• Total number of polymer chains: 1
• Total formula weight: 65683.57

Authors

Ke, H.,Wang, y. (deposition date: 2018-03-14, release date: 2019-02-20, Last modification date: 2024-04-03)

Primary citation

Yao, T.,Huang, Y.,Zhang, M.,Chen, Y.,Pei, H.,Shi, J.,Wang, H.,Wang, Y.,Ke, H.
Crystal Structures of Candida albicans Phosphodiesterase 2 and Implications for Its Biological Functions.
Biochemistry, 57:6070-6077, 2018

PubMed Abstract: The cAMP signaling system plays important roles in the physiological processes of pathogen yeast Candida albicans, but its functional mechanism has not been well illustrated. Here, we report the enzymatic characterization and crystal structures of C. albicans phosphodiesterase 2 (caPDE2) in the unliganded and 3-isobutyl-1-methylxanthine-complexed forms. caPDE2 is a monomer in liquid and crystal states and specifically hydrolyzes cAMP with a K of 35 nM. It does not effectively hydrolyze cGMP as shown by the 1.32 × 10-fold specificity of cAMP/cGMP. The crystal structure of caPDE2 shows significant differences from those of human PDEs. First, the N-terminal fragment of caPDE2 (residues 1-201) tightly associates with the catalytic domain to form a rigid molecular entity, implying its stable molecular conformation for C. albicans to resist environmental stresses. Second, the M-loop, a critical fragment for binding of the substrate and inhibitors to human PDEs, is not a part of the caPDE2 active site. This feature of caPDE2 may provide a structural basis for the design of selective inhibitors for the treatment of yeast infection.

PubMed: 30231198
DOI: 10.1021/acs.biochem.8b00707

Experimental method

X-RAY DIFFRACTION (1.8 Å)