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| | ==Crystal structure of the Keap1 protein in complexed with the N-terminal region of the Nrf2 transcription factor== | | ==Crystal structure of the Keap1 protein in complexed with the N-terminal region of the Nrf2 transcription factor== |
| - | <StructureSection load='2dyh' size='340' side='right' caption='[[2dyh]], [[Resolution|resolution]] 1.90Å' scene=''> | + | <StructureSection load='2dyh' size='340' side='right'caption='[[2dyh]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2dyh]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DYH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2DYH FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2dyh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DYH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2DYH 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]] 1.9Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1x2j|1x2j]], [[1x2r|1x2r]]</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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2dyh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dyh OCA], [http://pdbe.org/2dyh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2dyh RCSB], [http://www.ebi.ac.uk/pdbsum/2dyh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2dyh ProSAT], [http://www.topsan.org/Proteins/RSGI/2dyh TOPSAN]</span></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=2dyh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dyh OCA], [https://pdbe.org/2dyh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2dyh RCSB], [https://www.ebi.ac.uk/pdbsum/2dyh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2dyh ProSAT], [https://www.topsan.org/Proteins/RSGI/2dyh TOPSAN]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/KEAP1_MOUSE KEAP1_MOUSE]] Retains NFE2L2/NRF2 in the cytosol. Functions as substrate adapter protein for the E3 ubiquitin ligase complex formed by CUL3 and RBX1. Targets NFE2L2/NRF2 for ubiquitination and degradation by the proteasome, thus resulting in the suppression of its transcriptional activity and the repression of antioxidant response element-mediated detoxifying enzyme gene expression. May also retain BPTF in the cytosol. Targets PGAM5 for ubiquitination and degradation by the proteasome (By similarity).<ref>PMID:9887101</ref> <ref>PMID:12682069</ref> [[http://www.uniprot.org/uniprot/NF2L2_MOUSE NF2L2_MOUSE]] Transcription activator that binds to antioxidant response (ARE) elements in the promoter regions of target genes. Important for the coordinated up-regulation of genes in response to oxidative stress. May be involved in the transcriptional activation of genes of the beta-globin cluster by mediating enhancer activity of hypersensitive site 2 of the beta-globin locus control region.<ref>PMID:9887101</ref> | + | [https://www.uniprot.org/uniprot/KEAP1_MOUSE KEAP1_MOUSE] Retains NFE2L2/NRF2 in the cytosol. Functions as substrate adapter protein for the E3 ubiquitin ligase complex formed by CUL3 and RBX1. Targets NFE2L2/NRF2 for ubiquitination and degradation by the proteasome, thus resulting in the suppression of its transcriptional activity and the repression of antioxidant response element-mediated detoxifying enzyme gene expression. May also retain BPTF in the cytosol. Targets PGAM5 for ubiquitination and degradation by the proteasome (By similarity).<ref>PMID:9887101</ref> <ref>PMID:12682069</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| | Check<jmol> | | Check<jmol> |
| | <jmolCheckbox> | | <jmolCheckbox> |
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dy/2dyh_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dy/2dyh_consurf.spt"</scriptWhenChecked> |
| | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
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| | ==See Also== | | ==See Also== |
| - | *[[Kelch-like protein|Kelch-like protein]] | + | *[[Kelch-like protein 3D structures|Kelch-like protein 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Lk3 transgenic mice]] | + | [[Category: Large Structures]] |
| - | [[Category: Padmanabhan, B]] | + | [[Category: Mus musculus]] |
| - | [[Category: Structural genomic]] | + | [[Category: Padmanabhan B]] |
| - | [[Category: Yokoyama, S]] | + | [[Category: Yokoyama S]] |
| - | [[Category: Bet-propeller]]
| + | |
| - | [[Category: Kelch motif]]
| + | |
| - | [[Category: National project on protein structural and functional analyse]]
| + | |
| - | [[Category: Nppsfa]]
| + | |
| - | [[Category: Rsgi]]
| + | |
| - | [[Category: Transcription]]
| + | |
| Structural highlights
Function
KEAP1_MOUSE Retains NFE2L2/NRF2 in the cytosol. Functions as substrate adapter protein for the E3 ubiquitin ligase complex formed by CUL3 and RBX1. Targets NFE2L2/NRF2 for ubiquitination and degradation by the proteasome, thus resulting in the suppression of its transcriptional activity and the repression of antioxidant response element-mediated detoxifying enzyme gene expression. May also retain BPTF in the cytosol. Targets PGAM5 for ubiquitination and degradation by the proteasome (By similarity).[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Nrf2 is the regulator of the oxidative/electrophilic stress response. Its turnover is maintained by Keap1-mediated proteasomal degradation via a two-site substrate recognition mechanism in which two Nrf2-Keap1 binding sites form a hinge and latch. The E3 ligase adaptor Keap1 recognizes Nrf2 through its conserved ETGE and DLG motifs. In this study, we examined how the ETGE and DLG motifs bind to Keap1 in a very similar fashion but with different binding affinities by comparing the crystal complex of a Keap1-DC domain-DLG peptide with that of a Keap1-DC domain-ETGE peptide. We found that these two motifs interact with the same basic surface of either Keap1-DC domain of the Keap1 homodimer. The DLG motif works to correctly position the lysines within the Nrf2 Neh2 domain for efficient ubiquitination. Together with the results from calorimetric and functional studies, we conclude that different electrostatic potentials primarily define the ETGE and DLG motifs as a hinge and latch that senses the oxidative/electrophilic stress.
Different electrostatic potentials define ETGE and DLG motifs as hinge and latch in oxidative stress response.,Tong KI, Padmanabhan B, Kobayashi A, Shang C, Hirotsu Y, Yokoyama S, Yamamoto M Mol Cell Biol. 2007 Nov;27(21):7511-21. Epub 2007 Sep 4. PMID:17785452[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Itoh K, Wakabayashi N, Katoh Y, Ishii T, Igarashi K, Engel JD, Yamamoto M. Keap1 represses nuclear activation of antioxidant responsive elements by Nrf2 through binding to the amino-terminal Neh2 domain. Genes Dev. 1999 Jan 1;13(1):76-86. PMID:9887101
- ↑ McMahon M, Itoh K, Yamamoto M, Hayes JD. Keap1-dependent proteasomal degradation of transcription factor Nrf2 contributes to the negative regulation of antioxidant response element-driven gene expression. J Biol Chem. 2003 Jun 13;278(24):21592-600. Epub 2003 Apr 7. PMID:12682069 doi:10.1074/jbc.M300931200
- ↑ Tong KI, Padmanabhan B, Kobayashi A, Shang C, Hirotsu Y, Yokoyama S, Yamamoto M. Different electrostatic potentials define ETGE and DLG motifs as hinge and latch in oxidative stress response. Mol Cell Biol. 2007 Nov;27(21):7511-21. Epub 2007 Sep 4. PMID:17785452 doi:10.1128/MCB.00753-07
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