7coi

Crystal structure of the b-carbonic anhydrase CafA of the fungal pathogen Aspergillus fumigatus

spinqualitylabelsall models 7coi, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7coi is a 4 chain structure with sequence from Aspergillus fumigatus Af293. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: ACT, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q4WQ18_ASPFU Reversible hydration of carbon dioxide.[RuleBase:RU003956] Publication Abstract from PubMed The beta-class of carbonic anhydrases (beta-CAs) are zinc metalloenzymes widely distributed in the fungal kingdom that play essential roles in growth, survival, differentiation, and virulence by catalyzing the reversible interconversion of carbon dioxide (CO2) and bicarbonate (HCO3(-)). Herein, we report the biochemical and crystallographic characterization of the beta-CA CafA from the fungal pathogen Aspergillus fumigatus, the main causative agent of invasive aspergillosis. CafA exhibited apparent in vitro CO2 hydration activity in neutral to weak alkaline conditions, but little activity at acidic pH. The high-resolution crystal structure of CafA revealed a tetramer comprising a dimer of dimers, in which the catalytic zinc ion is tetrahedrally coordinated by three conserved residues (C119, H175, C178) and an acetate anion presumably acquired from the crystallization solution, indicating a freely accessible open conformation. Furthermore, knowledge of the structure of CafA in complex with the potent inhibitor acetazolamide, together with its functional intolerance of nitrate (NO3(-)) ions, could be exploited to develop new antifungal agents for the treatment of invasive aspergillosis. Crystal Structure of beta-Carbonic Anhydrase CafA from the Fungal Pathogen Aspergillus fumigatus.,Kim S, Yeon J, Sung J, Jin MS Mol Cells. 2020 Sep 30;43(9):831-840. doi: 10.14348/molcells.2020.0168. PMID:32975213 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Carbonic anhydrase 3D structures

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