4O5U
Crystal structure of Alkylhydroperoxide Reductase subunit F from E. coli at 2.65 Ang resolution
Summary for 4O5U
| Entry DOI | 10.2210/pdb4o5u/pdb |
| Related | 1FL2 4o5q 4o5r |
| Descriptor | Alkyl hydroperoxide reductase subunit F, SULFATE ION, FLAVIN-ADENINE DINUCLEOTIDE, ... (5 entities in total) |
| Functional Keywords | oxidoreductase |
| Biological source | Escherichia coli |
| Total number of polymer chains | 1 |
| Total formula weight | 57909.34 |
| Authors | Kamariah, N.,Dip, P.V.,Manimekalai, M.S.S.,Gruber, G.,Eisenhaber, F.,Eisenhaber, B. (deposition date: 2013-12-20, release date: 2014-11-05, Last modification date: 2024-11-06) |
| Primary citation | Dip, P.V.,Kamariah, N.,Subramanian Manimekalai, M.S.,Nartey, W.,Balakrishna, A.M.,Eisenhaber, F.,Eisenhaber, B.,Gruber, G. Structure, mechanism and ensemble formation of the alkylhydroperoxide reductase subunits AhpC and AhpF from Escherichia coli Acta Crystallogr.,Sect.D, 70:2848-2862, 2014 Cited by PubMed Abstract: Hydroperoxides are reactive oxygen species (ROS) that are toxic to all cells and must be converted into the corresponding alcohols to alleviate oxidative stress. In Escherichia coli, the enzyme primarily responsible for this reaction is alkylhydroperoxide reductase (AhpR). Here, the crystal structures of both of the subunits of EcAhpR, EcAhpF (57 kDa) and EcAhpC (21 kDa), have been solved. The EcAhpF structures (2.0 and 2.65 Å resolution) reveal an open and elongated conformation, while that of EcAhpC (3.3 Å resolution) forms a decameric ring. Solution X-ray scattering analysis of EcAhpF unravels the flexibility of its N-terminal domain, and its binding to EcAhpC was demonstrated by isothermal titration calorimetry. These studies suggest a novel overall mechanistic model of AhpR as a hydroperoxide scavenger, in which the dimeric, extended AhpF prefers complex formation with the AhpC ring to accelerate the catalytic activity and thus to increase the chance of rescuing the cell from ROS. PubMed: 25372677DOI: 10.1107/S1399004714019233 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.65 Å) |
Structure validation
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