3X35
Crystal structure of the reduced form of the solubilized domain of porcine cytochrome b5 in form 2 crystal
Summary for 3X35
| Entry DOI | 10.2210/pdb3x35/pdb |
| Related | 3X32 3X33 3X34 |
| Descriptor | Cytochrome b5, PROTOPORPHYRIN IX CONTAINING FE, ACETATE ION, ... (4 entities in total) |
| Functional Keywords | heme, electron transport |
| Biological source | Sus scrofa (Pig) |
| Total number of polymer chains | 1 |
| Total formula weight | 11446.42 |
| Authors | Hirano, Y.,Kimura, S.,Tamada, T. (deposition date: 2015-01-14, release date: 2015-07-15, Last modification date: 2023-11-08) |
| Primary citation | Hirano, Y.,Kimura, S.,Tamada, T. High-resolution crystal structures of the solubilized domain of porcine cytochrome b5. Acta Crystallogr.,Sect.D, 71:1572-1581, 2015 Cited by PubMed Abstract: Mammalian microsomal cytochrome b5 has multiple electron-transfer partners that function in various electron-transfer reactions. Four crystal structures of the solubilized haem-binding domain of cytochrome b5 from porcine liver were determined at sub-angstrom resolution (0.76-0.95 Å) in two crystal forms for both the oxidized and reduced states. The high-resolution structures clearly displayed the electron density of H atoms in some amino-acid residues. Unrestrained refinement of bond lengths revealed that the protonation states of the haem propionate group may be involved in regulation of the haem redox properties. The haem Fe coordination geometry did not show significant differences between the oxidized and reduced structures. However, structural differences between the oxidized and reduced states were observed in the hydrogen-bond network around the axial ligand His68. The hydrogen-bond network could be involved in regulating the redox states of the haem group. PubMed: 26143928DOI: 10.1107/S1399004715009438 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (0.95 Å) |
Structure validation
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