A new crystal lattice structure of Helicobacter pylori neutrophil-activating protein (HP-NAP)
Tsuruta, O., Yokoyama, H., Fujii, S.(2012) Acta Crystallogr Sect F Struct Biol Cryst Commun 68: 134-140
- PubMed: 22297984 
- DOI: https://doi.org/10.1107/S1744309111052675
- Primary Citation of Related Structures:  
3T9J, 3TA8 - PubMed Abstract: 
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.
Organizational Affiliation: 
School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka-shi, Shizuoka, Japan.