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A new crystal lattice structure of Helicobacter pylori neutrophil‐activating protein (HP‐NAP) has been determined in two forms: the native state (Apo) at 2.20 Å resolution and an iron‐loaded form (Fe‐load) at 2.50 Å resolution. The highly solvated packing of the dodecameric shell is suitable for crystallographic study of the metal ion‐uptake pathway. Like other bacterioferritins, HP‐NAP forms a spherical dodecamer with 23 symmetry including two kinds of channels. Iron loading causes a series of conformational changes of amino‐acid residues (Trp26, Asp52 and Glu56) at the ferroxidase centre.
Acta Crystallographica Section F – Wiley
Published: Feb 1, 2012
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