Crystal structure of an iron superoxide dismutase from the pathogenic amoeba Acanthamoeba castellaniiopen access
- Dao, Oanh; Asaithambi, Killivalavan; Na, Byeong Kuk; Lee, Kon Ho
- Issue Date
- INT UNION CRYSTALLOGRAPHY
- iron superoxide dismutase; Acanthamoeba castellanii
- ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS, v.75, pp.480 - 488
- Journal Title
- ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS
- Start Page
- End Page
- The iron superoxide dismutase found in the pathogenic amoeba Acanthamoeba castellanii (AcFeSOD) may play essential roles in the survival of the parasite, not only by protecting it from endogenous oxidative stress but also by detoxifying oxidative killing of the parasite by host immune effector cells. The AcFeSOD protein was expressed in a stable form using an Escherichia coli expression system and was crystallized by the microbatch and hanging-drop vapour-diffusion methods. The structure was determined to 2.33 angstrom resolution from a single AcFeSOD crystal. The crystal belonged to the hexagonal space group P6(1) and contained 12 molecules forming three tetramers in the asymmetric unit, with an iron ion bound in each molecule. Structural comparisons and sequence alignment of AcFeSOD with other FeSODs showed a well conserved overall fold and conserved active-site residues with subtle differences.
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- College of Medicine > Department of Medicine > Journal Articles
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