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| | <StructureSection load='6o2e' size='340' side='right'caption='[[6o2e]], [[Resolution|resolution]] 1.90Å' scene=''> | | <StructureSection load='6o2e' size='340' side='right'caption='[[6o2e]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6o2e]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6O2E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6O2E FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6o2e]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6O2E OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6O2E FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</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]] 1.896Å</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=6o2e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6o2e OCA], [http://pdbe.org/6o2e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6o2e RCSB], [http://www.ebi.ac.uk/pdbsum/6o2e PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6o2e ProSAT]</span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</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=6o2e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6o2e OCA], [https://pdbe.org/6o2e PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6o2e RCSB], [https://www.ebi.ac.uk/pdbsum/6o2e PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6o2e ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GCN4_YEAST GCN4_YEAST]] Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'. | + | [https://www.uniprot.org/uniprot/GCN4_YEAST GCN4_YEAST] Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | | | |
| | ==See Also== | | ==See Also== |
| | + | *[[Gcn4 3D Structures|Gcn4 3D Structures]] |
| | *[[Gnc4 3D Structures|Gnc4 3D Structures]] | | *[[Gnc4 3D Structures|Gnc4 3D Structures]] |
| | == References == | | == References == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Draper, S R.E]] | + | [[Category: Saccharomyces cerevisiae S288C]] |
| - | [[Category: Price, J L]] | + | [[Category: Draper SRE]] |
| - | [[Category: Smith, M]] | + | [[Category: Price JL]] |
| - | [[Category: Xiao, Q]] | + | [[Category: Smith M]] |
| - | [[Category: Gcn4]] | + | [[Category: Xiao Q]] |
| - | [[Category: Peg]]
| + | |
| - | [[Category: Pegylation]]
| + | |
| - | [[Category: Transcription]]
| + | |
| Structural highlights
Function
GCN4_YEAST Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'.
Publication Abstract from PubMed
Conjugation of polyethylene glycol (PEGylation) is a well-known strategy for extending the serum half-life of protein drugs and for increasing their resistance to proteolysis and aggregation. We previously showed that PEGylation can increase protein conformational stability; the extent of PEG-based stabilization depends on the PEGylation site, the structure of the PEG-protein linker, and the ability of PEG to release water molecules from the surrounding protein surface to bulk solvent. The strength of a non-covalent interaction within a protein depends highly on its microenvironment, with salt-bridge and hydrogen-bond strength increasing in non-polar vs. aqueous environments. Accordingly, we wondered whether partial desolvation by PEG of the surrounding protein surface might result in measurable increases in the strength of a salt bridge near a PEGylation site. Here we explore this possibility using triple mutant box analysis to assess the impact of PEGylation on the strength of nearby salt bridges at specific locations within three peptide model systems. The results indicate that PEG can increase nearby salt bridge strength, though this effect is not universal, and its precise structural prerequisites are not a simple function of secondary structural context, of orientation and distance between PEGylation site and salt bridge, or of salt-bridge residue identity. We obtained high-resolution x-ray diffraction data for a PEGylated peptide in which PEG enhances the strength of a nearby salt bridge. Comparing the electron density map of this PEGylated peptide vs. that of its non-PEGylated counterpart provide evidences for localized protein surface desolvation as a mechanism for the PEG-based salt-bridge stabilization.
Influence of PEGylation on the strength of protein surface salt bridges.,Xiao Q, Draper SRE, Smith MS, Brown N, Pugmire NAB, Ashton DS, Carter AJ, Lawrence EEK, Price JL ACS Chem Biol. 2019 Jun 12. doi: 10.1021/acschembio.9b00432. PMID:31188563[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Xiao Q, Draper SRE, Smith MS, Brown N, Pugmire NAB, Ashton DS, Carter AJ, Lawrence EEK, Price JL. Influence of PEGylation on the strength of protein surface salt bridges. ACS Chem Biol. 2019 Jun 12. doi: 10.1021/acschembio.9b00432. PMID:31188563 doi:http://dx.doi.org/10.1021/acschembio.9b00432
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