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Crystal structure of the ferritin from the hyperthermophilic archaeal anaerobe Pyrococcus furiosus.
(2007) J Biol Inorg Chem 12
PubMed: 17541801 | PubMedCentral: PMC1915633 | DOI: 10.1007/s00775-007-0212-3
Table 3 Proteins with known 3D structure most closely homologous to PfFtn PDB ID Protein name Source organism Chain length Identity (%) Identity SS-aligned (%) Q score a RMSD (Å) 1vlg ... erritin (TM1128) Thermotoga maritima 176 55 55.3 0.92 0.49 1s3q Ferritin Archaeoglobus fulgidus 173 50 48.2 0.94 0.53 1krq Ferritin Campylobacter jejuni 167 39 39.2 0.81 1.02 1eum Ferritin ECFTNA Escherichia coli 165 38 38.4 0.86 0.90 1r03 Mitochondrial ferritin Homo sapiens 182 40 30.6 0.68 1.55 2fha H ferritin K86Q mutant Homo sapiens 183 37 29.4 0.62 1.98 1mfr M ferritin Rana catesbeiana 176 36 29.6 0.68 1.67 1rcg L ferritin Rana catesbeiana 173 32 25.0 0.61 2.03 PDB Protein Data Bank, SS secondary structure, RMSD root mean square deviation a Parameter that takes the alignment length and the RMSD between the superimposed atoms into account, and varies from 0 in the case of poor matches to 1 in the case of identical proteins Structure of the PfFtn 24-mer and comparison with AfFtn A highly conserved quaternary structure appears among all known ferritins—a spherical tetraeicosameric assembly with 432 point-group symmetry.
Publication Year: 2007
Inhibition and stimulation of formation of the ferroxidase center and the iron core in Pyrococcus furiosus ferritin.
(2010) J Biol Inorg Chem 15
PubMed: 20582559 | PubMedCentral: PMC2988210 | DOI: 10.1007/s00775-010-0682-6
1 Structure of the diiron binding site of a the Pyrococcus furiosus ferritin (PfFtn) [Protein Data Bank (PDB) 2JD7] in comparison with b the diiron binding site of human H-chain ferritin (PDB... 1FHA), c bullfrog M-chain ferritin (PDB 1MFR), and d the diiron binding site of Escherichia coli bacterioferritin (PDB 3E1J) It has been shown that binding of other metals such as Zn(II) and Tb(III) inhibits the iron-oxidation activity of several ferritins [ 25 – 27 ].
Publication Year: 2010
Spectroscopic studies of single and double variants of M ferritin: lack of conversion of a biferrous substrate site into a cofactor site for O2 activation.
(2014) Biochemistry 53
PubMed: 24397299 | PubMedCentral: PMC3985457 | DOI: 10.1021/bi4013726
25 Because the dioxygen channel in ferritin is not well-defined, we focus on the active site pocket in WT ferritin and the double variant (WT ferritin obtained from crystal structure, RCSB 1MFR, ref (... 20 ); the double variant obtained by substituting the ligands from the WT crystal structure (Q137 to E and D140 to H), optimizing this structure with α-carbon position constraints using DFT, 38 and placing the optimized structure into the protein active site).
Figure 8 Active site pocket for small molecule access in (a) WT ferritin, RCSB 1MFR (ref ( 20 )); (b) Q137E/D140H double variant, optimized using DFT with the BP 86 functional with α-carbon constraints after amino acid substitution (Q137→E, D140→H); (c) D84E RNR, RCSB 1PIZ (ref ( 39 )).
D84E RNR has additional protein segments surrounding its 4-helix bundle, while the 4-helix bundles in the ferritin subunits are more exposed; (b) metal site (green) in ferritin Q137E/D140H variant from the view within the cage (top, changed Q to E and D to H from WT ferritin structure, RCSB 1MFR, ref ( 20 )) and metal site (green) in D84E RNR (bottom, obtained from crystal structure RCSB 1PIZ, ref ( 39 )).
Figure 1 Proposed WT ferritin biferrous active site from crystal structure with (a) Mg 2+ (RCSB 1MFR, ref ( 20 )); (b) Co 2+ (RCSB 3KA4, ref ( 27 )); and (c) Cu 2+ (RCSB 3RE7, ref ( 30 )).
Publication Year: 2014
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