7CTO
Staphylococcus aureus MsrB
Summary for 7CTO
| Entry DOI | 10.2210/pdb7cto/pdb |
| Descriptor | Peptide methionine sulfoxide reductase MsrB (1 entity in total) |
| Functional Keywords | oxidoreductase, methionine sulfoxide reductase |
| Biological source | Staphylococcus aureus |
| Total number of polymer chains | 6 |
| Total formula weight | 109946.05 |
| Authors | Kim, H.J. (deposition date: 2020-08-19, release date: 2020-10-07, Last modification date: 2023-11-29) |
| Primary citation | Kim, H.J. Implication of Staphylococcus aureus MsrB dimerization upon oxidation. Biochem.Biophys.Res.Commun., 533:118-124, 2020 Cited by PubMed Abstract: Oxidative modification of protein structure has been shown to play a significant role in bacterial virulence and metabolism. The sulfur-containing residues are susceptible to oxidation and the enzymatic reversal of oxidized cysteine or methionine is detected in many organisms. Methionine sulfoxide reductases (Msr) are responsible for reducing oxidized methionine. The two different Msrs, MsrA and MsrB, reduce methionine R-sulfoxide and methionine S-sulfoxide, respectively through self-oxidation. This study elucidated the structure of MsrB from Staphylococcus aureus Mu50 and its changes upon oxidation. The active site shows two reduced cysteines in a close contact, implying disulfide bond would form without major structural rearrangement. When the protein is exposed to an oxidative condition, a dimeric state is observed. The dimerization of MsrB creates a valley structure for accepting peptidyl substrates. To the best of our knowledge, oxidation induced dimerization of MsrB would help to understand mechanism behind redox control that has not been well characterized. PubMed: 32943184DOI: 10.1016/j.bbrc.2020.08.070 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (3.47 Å) |
Structure validation
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