Wenming Wang / Hongfang Xi / Dan Fu / Danyang Ma / Wenjun Gong / Yaqin Zhao / Xiaomei Li / Lijie Wu / Yu Guo / Guanghua Zhao / Hongfei Wang /
PubMed Abstract
All protein-directed syntheses of metal nanoclusters (NCs) and nanoparticles (NPs) have attracted considerable attention because protein scaffolds provide a unique metal coordination environment and ...All protein-directed syntheses of metal nanoclusters (NCs) and nanoparticles (NPs) have attracted considerable attention because protein scaffolds provide a unique metal coordination environment and can adjust the shape and morphology of NCs and NPs. However, the detailed formation mechanisms of NCs or NPs directed by protein templates remain unclear. In this study, by taking advantage of the ferritin nanocage as a biotemplate to monitor the growth of Fe-O NCs as a function of time, we synthesized a series of iron NCs with different sizes and shapes and subsequently solved their corresponding three-dimensional atomic-scale structures by X-ray protein crystallography and cryo-electron microscopy. The time-dependent structure analyses revealed the growth process of these Fe-O NCs with the 4-fold channel of ferritin as nucleation sites. To our knowledge, the newly biosynthesized FeOGlu represents the largest Fe-O NCs with a definite atomic structure. This study contributes to our understanding of the formation mechanism of iron NCs and provides an effective method for metal NC synthesis.
EMDB-37754, PDB-8wqu: Fe-O nanocluster of form-IX in the 4-fold channel of Ureaplasma diversum ferritin Method: EM (single particle) / Resolution: 2.8 Å
EMDB-37755, PDB-8wqv: Fe-O nanocluster of form-VIII in the 4-fold channel of Ureaplasma diversum ferritin Method: EM (single particle) / Resolution: 2.7 Å
EMDB-37757, PDB-8wqx: Fe-O nanocluster of form-X in the 4-fold channel of Ureaplasma diversum ferritin Method: EM (single particle) / Resolution: 3.2 Å
EMDB-37758, PDB-8wqy: Fe-O nanocluster of form-XI in the 4-fold channel of Ureaplasma diversum ferritin Method: EM (single particle) / Resolution: 3.0 Å
EMDB-37759, PDB-8wr0: Fe-O nanocluster of form-XII in the 4-fold channel of Ureaplasma diversum ferritin Method: EM (single particle) / Resolution: 3.1 Å
PDB-8w6m: Native strucutre of ferritin from Ureaplasma diversum Method: X-RAY DIFFRACTION / Resolution: 2.501 Å
PDB-8w6q: ferritin from Ureaplasma diversum soaking in Fe2+ solution for 0 min Method: X-RAY DIFFRACTION / Resolution: 2.101 Å
PDB-8w6s: Ferritin from Ureaplasma diversum soaking in Fe2+ solution for 2 min Method: X-RAY DIFFRACTION / Resolution: 2.099 Å
PDB-8w6u: Ferritin from Ureaplasma diversum soaking in Fe2+ solution for 5 min Method: X-RAY DIFFRACTION / Resolution: 2.099 Å
PDB-8w6y: Ferritin from Ureaplasma diversum soaking in Fe2+ solution for 10 min Method: X-RAY DIFFRACTION / Resolution: 2.502 Å
PDB-8w73: Fe-O nanocluster of form-I in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.601 Å
PDB-8w74: Fe-O nanocluster of form-II in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.5 Å
PDB-8w79: Fe-O nanocluster of form-III in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.697 Å
PDB-8w7b: Fe-O nanocluster of form-IV in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.7 Å
PDB-8w7o: Fe-O nanocluster of form-V in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.399 Å
PDB-8w7q: Fe-O nanocluster of form-VI in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.1 Å
PDB-8w7t: Fe-O nanocluster of form-VII in the 4-fold channel of Ureaplasma diversum ferritin Method: X-RAY DIFFRACTION / Resolution: 2.499 Å
PDB-8w7u: Mutant of ferritin from Ureaplasma diversum (Udif-E164A-E168A) without soaking Method: X-RAY DIFFRACTION / Resolution: 2.502 Å
PDB-8w7v: Udif-E164A-E168A soaking in Fe2+ solution for 50 minutes Method: X-RAY DIFFRACTION / Resolution: 2.805 Å
PDB-8wpt: Truncated mutant (1-171) of ferritin from Ureaplasma diversum Method: X-RAY DIFFRACTION / Resolution: 2.36 Å
PDB-8wpv: Truncated mutant (1-171) of ferritin from Ureaplasma diversum soaked in Fe2+ solution for 30min Method: X-RAY DIFFRACTION / Resolution: 2.059 Å
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