5FNP
High resolution Zn containing Iron sulfur cluster repair protein YtfE
Summary for 5FNP
Entry DOI | 10.2210/pdb5fnp/pdb |
Related | 5FNN 5FNY |
Descriptor | IRON-SULFUR CLUSTER REPAIR PROTEIN YTFE, ZINC ION, CHLORIDE ION, ... (5 entities in total) |
Functional Keywords | oxidoreductase, nitric oxide, iron-sulfur cluster repair, di-fe center. |
Biological source | ESCHERICHIA COLI |
Cellular location | Cytoplasm : P69506 |
Total number of polymer chains | 2 |
Total formula weight | 50067.57 |
Authors | Lo, F.-C.,Hsieh, C.-C.,Maestre-Reyna, M.,Chen, C.-Y.,Ko, T.-P.,Horng, Y.-C.,Lai, Y.-C.,Chiang, Y.-W.,Chou, C.-M.,Chiang, C.-H.,Huang, W.-N.,Liaw, W.-F. (deposition date: 2015-11-16, release date: 2016-04-27, Last modification date: 2024-11-13) |
Primary citation | Lo, F.-C.,Hsieh, C.-C.,Maestre-Reyna, M.,Chen, C.-Y.,Ko, T.-P.,Horng, Y.-C.,Lai, Y.-C.,Chiang, Y.-W.,Chou, C.-M.,Chiang, C.-H.,Huang, W.-N.,Liaw, W.-F. Crystal Structure of the Repair of Iron Centers Protein Ytfe and its Interaction with No Chemistry, 22:9768-, 2016 Cited by PubMed Abstract: Molecular mechanisms underlying the repair of nitrosylated [Fe-S] clusters by the microbial protein YtfE remain poorly understood. The X-ray crystal structure of YtfE, in combination with EPR, magnetic circular dichroism (MCD), UV, and (17) O-labeling electron spin echo envelope modulation measurements, show that each iron of the oxo-bridged Fe(II) -Fe(III) diiron core is coordinatively unsaturated with each iron bound to two bridging carboxylates and two terminal histidines in addition to an oxo-bridge. Structural analysis reveals that there are two solvent-accessible tunnels, both of which converge to the diiron center and are critical for capturing substrates. The reactivity of the reduced-form Fe(II) -Fe(II) YtfE toward nitric oxide demonstrates that the prerequisite for N2 O production requires the two iron sites to be nitrosylated simultaneously. Specifically, the nitrosylation of the two iron sites prior to their reductive coupling to produce N2 O is cooperative. This result suggests that, in addition to any repair of iron centers (RIC) activity, YtfE acts as an NO-trapping scavenger to promote the NO to N2 O transformation under low NO flux, which precedes nitrosative stress. PubMed: 27246459DOI: 10.1002/CHEM.201600990 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (1.8 Å) |
Structure validation
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