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| | ==2.05A resolution structure of iron bound BfrB (L68A E81A) from Pseudomonas aeruginosa== | | ==2.05A resolution structure of iron bound BfrB (L68A E81A) from Pseudomonas aeruginosa== |
| - | <StructureSection load='5d8y' size='340' side='right' caption='[[5d8y]], [[Resolution|resolution]] 2.05Å' scene=''> | + | <StructureSection load='5d8y' size='340' side='right'caption='[[5d8y]], [[Resolution|resolution]] 2.05Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5d8y]] is a 24 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseae Pseae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5D8Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5D8Y FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5d8y]] is a 24 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa_PAO1 Pseudomonas aeruginosa PAO1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5D8Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5D8Y FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5d8o|5d8o]], [[5d8p|5d8p]], [[5d8q|5d8q]], [[5d8r|5d8r]], [[5d8s|5d8s]], [[5d8x|5d8x]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">bfrB, PA3531 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=208964 PSEAE])</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5d8y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5d8y OCA], [https://pdbe.org/5d8y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5d8y RCSB], [https://www.ebi.ac.uk/pdbsum/5d8y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5d8y ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ferroxidase Ferroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.16.3.1 1.16.3.1] </span></td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5d8y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5d8y OCA], [http://pdbe.org/5d8y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5d8y RCSB], [http://www.ebi.ac.uk/pdbsum/5d8y PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5d8y ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/Q9HY79_PSEAE Q9HY79_PSEAE]] Iron-storage protein (By similarity). Iron-storage protein, whose ferroxidase center binds Fe(2+) ions, oxidizes them by dioxygen to Fe(3+), and participates in the subsequent Fe(3+) oxide mineral core formation within the central cavity of the protein complex (By similarity).[PIRNR:PIRNR002560] | + | [https://www.uniprot.org/uniprot/Q9HY79_PSEAE Q9HY79_PSEAE] Iron-storage protein (By similarity). Iron-storage protein, whose ferroxidase center binds Fe(2+) ions, oxidizes them by dioxygen to Fe(3+), and participates in the subsequent Fe(3+) oxide mineral core formation within the central cavity of the protein complex (By similarity).[PIRNR:PIRNR002560] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 5d8y" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 5d8y" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Ferritin 3D structures|Ferritin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Ferroxidase]] | + | [[Category: Large Structures]] |
| - | [[Category: Pseae]] | + | [[Category: Pseudomonas aeruginosa PAO1]] |
| - | [[Category: Battaile, K P]] | + | [[Category: Battaile KP]] |
| - | [[Category: Lovell, S]] | + | [[Category: Lovell S]] |
| - | [[Category: Rivera, M]] | + | [[Category: Rivera M]] |
| - | [[Category: Wang, Y]] | + | [[Category: Wang Y]] |
| - | [[Category: Yao, H]] | + | [[Category: Yao H]] |
| - | [[Category: Electron transport]]
| + | |
| - | [[Category: Iron binding]]
| + | |
| - | [[Category: Iron mobilization]]
| + | |
| - | [[Category: Iron storage]]
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| - | [[Category: Oxidoreductase]]
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| Structural highlights
Function
Q9HY79_PSEAE Iron-storage protein (By similarity). Iron-storage protein, whose ferroxidase center binds Fe(2+) ions, oxidizes them by dioxygen to Fe(3+), and participates in the subsequent Fe(3+) oxide mineral core formation within the central cavity of the protein complex (By similarity).[PIRNR:PIRNR002560]
Publication Abstract from PubMed
Mobilization of iron stored in the interior cavity of BfrB requires electron transfer from the [2Fe-2S] cluster in Bfd to the core iron in BfrB. A crystal structure of the P. aeruginosa BfrB:Bfd complex revealed that BfrB can bind up to 12 Bfd molecules at 12 structurally identical binding sites, placing the [2Fe-2S] cluster of each Bfd immediately above a heme group in BfrB [Yao, H., Wang, Y., Lovell, S., Kumar, R., Ruvinsky, A. M., Battaile, K. P., Vakser, I. A., and Rivera, M. J. Am. Chem. Soc. (2012), 134, 13470-13481]. We report here a study aimed at characterizing the strength of the P. aeruginosa BfrB:Bfd association using surface plasmon resonance and isothermal titration calorimetry, as well as determining the binding energy hot spots at the protein-protein interaction interface. The results show that the 12 Bfd-binding sites on BfrB are equivalent and independent, and that the protein-protein association at each of these sites is driven entropically and is characterized by a dissociation constant (Kd) of approximately 3 muM. Determination of the binding energy hot spots was carried out by replacing certain residues that comprise the protein-protein interface with alanine, and by evaluating the effect of the mutation on Kd and on the efficiency of core iron mobilization from BfrB. The results identified hot-spot residues in both proteins [L_B^68, E_A^81 and E_A^85 in BfrB (superscript for residue number and subscript for chain) and Y2 and L5 in Bfd], which network at the interface to produce a highly complementary hot region for the interaction. The hot-spot residues are conserved in the amino acid sequences of Bfr and Bfd proteins from a number of gram negative pathogens, indicating that the BfrB:Bfd interaction is of widespread significance in bacterial iron metabolism.
Characterization of the Bacterioferritin/Bacterioferritin Associated Ferredoxin (BfrB:Bfd) Protein-Protein Interaction in Solution and Determination of Binding Energy Hot Spots.,Wang Y, Yao H, Cheng Y, Lovell SW, Battaile KP, Middaugh CR, Rivera M Biochemistry. 2015 Sep 28. PMID:26368531[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Wang Y, Yao H, Cheng Y, Lovell SW, Battaile KP, Middaugh CR, Rivera M. Characterization of the Bacterioferritin/Bacterioferritin Associated Ferredoxin (BfrB:Bfd) Protein-Protein Interaction in Solution and Determination of Binding Energy Hot Spots. Biochemistry. 2015 Sep 28. PMID:26368531 doi:http://dx.doi.org/10.1021/acs.biochem.5b00937
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