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| | <StructureSection load='6il7' size='340' side='right'caption='[[6il7]], [[Resolution|resolution]] 2.50Å' scene=''> | | <StructureSection load='6il7' size='340' side='right'caption='[[6il7]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6il7]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6IL7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6IL7 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6il7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Enterococcus_faecalis_V583 Enterococcus faecalis V583]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6IL7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6IL7 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6il7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6il7 OCA], [http://pdbe.org/6il7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6il7 RCSB], [http://www.ebi.ac.uk/pdbsum/6il7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6il7 ProSAT]</span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6il7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6il7 OCA], [https://pdbe.org/6il7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6il7 RCSB], [https://www.ebi.ac.uk/pdbsum/6il7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6il7 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/Q830N9_ENTFA Q830N9_ENTFA] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | + | [[Category: Enterococcus faecalis V583]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Balakrishna, A M]] | + | [[Category: Balakrishna AM]] |
| - | [[Category: Eisenhaber, B]] | + | [[Category: Eisenhaber B]] |
| - | [[Category: Eisenhaber, F]] | + | [[Category: Eisenhaber F]] |
| - | [[Category: Gruber, G]] | + | [[Category: Gruber G]] |
| - | [[Category: Shin, J]] | + | [[Category: Shin J]] |
| - | [[Category: Toh, Y K]] | + | [[Category: Toh YK]] |
| - | [[Category: Alkylhydroperoxide reductase]]
| + | |
| - | [[Category: Enterococcus faecali]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| - | [[Category: Thioredoxin-like domain]]
| + | |
| Structural highlights
Function
Q830N9_ENTFA
Publication Abstract from PubMed
The vancomycin-resistant Enterococcus faecalis alkyl hydroperoxide reductase complex (AhpR) with its subunits AhpC (EfAhpC) and AhpF (EfAhpF) is of paramount importance to restore redox homeostasis. Therefore, knowledge about this defense system is essential to understand its antibiotic-resistance and survival in hosts. Recently, we described the crystallographic structures of EfAhpC, the two-fold thioredoxin-like domain of EfAhpF, the novel phenomenon of swapping of the catalytic domains of EfAhpF as well as the unique linker length, connecting the catalytically active N-and C-terminal domains of EfAhpF. Here, using mutagenesis and enzymatic studies, we reveal the effect of an additional third cysteine (C503) in EfAhpF, which might optimize the functional adaptation of the E. faecalis enzyme under various physiological conditions. The crystal structure and solution NMR data of the engineered C503A mutant of the thioredoxin-like domain of EfAhpF were used to describe alterations in the environment of the additional cysteine residue during modulation of the redox-state. To glean insight into the epitope and mechanism of EfAhpF and -AhpC interaction as well as the electron transfer from the thioredoxin-like domain of EfAhpF to AhpC, NMR-titration experiments were performed, showing a coordinated disappearance of peaks in the thioredoxin-like domain of EfAhpF in the presence of full length EfAhpC, and indicating a stable EfAhpF-AhpC-complex. Combined with docking studies, the interacting residues of EfAhpF were identified and a mechanism of electron transfer of the EfAhpF donor to the electron acceptor EfAhpC is described.
Effect of the additional cysteine 503 of vancomycin-resistant Enterococcus faecalis (V583) alkylhydroperoxide reductase subunit F (AhpF) and the mechanism of AhpF and subunit C assembling.,Toh YK, Shin J, Balakrishna AM, Kamariah N, Gruber A, Eisenhaber F, Eisenhaber B, Gruber G Free Radic Biol Med. 2019 Apr 30;138:10-22. doi:, 10.1016/j.freeradbiomed.2019.04.036. PMID:31047989[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Toh YK, Shin J, Balakrishna AM, Kamariah N, Gruber A, Eisenhaber F, Eisenhaber B, Gruber G. Effect of the additional cysteine 503 of vancomycin-resistant Enterococcus faecalis (V583) alkylhydroperoxide reductase subunit F (AhpF) and the mechanism of AhpF and subunit C assembling. Free Radic Biol Med. 2019 Apr 30;138:10-22. doi:, 10.1016/j.freeradbiomed.2019.04.036. PMID:31047989 doi:http://dx.doi.org/10.1016/j.freeradbiomed.2019.04.036
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