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| | <StructureSection load='6qui' size='340' side='right'caption='[[6qui]], [[Resolution|resolution]] 1.94Å' scene=''> | | <StructureSection load='6qui' size='340' side='right'caption='[[6qui]], [[Resolution|resolution]] 1.94Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6qui]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Aeqvi Aeqvi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QUI OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6QUI FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6qui]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QUI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6QUI FirstGlance]. <br> |
| | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CRO:{2-[(1R,2R)-1-AMINO-2-HYDROXYPROPYL]-4-(4-HYDROXYBENZYLIDENE)-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>CRO</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CRO:{2-[(1R,2R)-1-AMINO-2-HYDROXYPROPYL]-4-(4-HYDROXYBENZYLIDENE)-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>CRO</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[6quj|6quj]], [[6quh|6quh]], [[6qug|6qug]]</div></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=6qui FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qui OCA], [https://pdbe.org/6qui PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6qui RCSB], [https://www.ebi.ac.uk/pdbsum/6qui PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6qui ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GFP ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6100 AEQVI])</td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6qui FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qui OCA], [http://pdbe.org/6qui PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6qui RCSB], [http://www.ebi.ac.uk/pdbsum/6qui PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6qui ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GFP_AEQVI GFP_AEQVI]] Energy-transfer acceptor. Its role is to transduce the blue chemiluminescence of the protein aequorin into green fluorescent light by energy transfer. Fluoresces in vivo upon receiving energy from the Ca(2+)-activated photoprotein aequorin. | + | [https://www.uniprot.org/uniprot/GFP_AEQVI GFP_AEQVI] Energy-transfer acceptor. Its role is to transduce the blue chemiluminescence of the protein aequorin into green fluorescent light by energy transfer. Fluoresces in vivo upon receiving energy from the Ca(2+)-activated photoprotein aequorin. |
| | <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: Aeqvi]] | + | [[Category: Aequorea victoria]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Gorlich, D]] | + | [[Category: Gorlich D]] |
| - | [[Category: Huyton, T]] | + | [[Category: Huyton T]] |
| - | [[Category: Fluorescent protein]]
| + | |
| - | [[Category: Gfp]]
| + | |
| Structural highlights
Function
GFP_AEQVI Energy-transfer acceptor. Its role is to transduce the blue chemiluminescence of the protein aequorin into green fluorescent light by energy transfer. Fluoresces in vivo upon receiving energy from the Ca(2+)-activated photoprotein aequorin.
Publication Abstract from PubMed
The growth of diffraction-quality crystals and experimental phasing remain two of the main bottlenecks in protein crystallography. Here, the high-affinity copper(II)-binding tripeptide GHK was fused to the N-terminus of a GFP variant and an MBP-FG peptide fusion. The GHK tag promoted crystallization, with various residues (His, Asp, His/Pro) from symmetry molecules completing the copper(II) square-pyramidal coordination sphere. Rapid structure determination by copper SAD phasing could be achieved, even at a very low Bijvoet ratio or after significant radiation damage. When collecting highly redundant data at a wavelength close to the copper absorption edge, residual S-atom positions could also be located in log-likelihood-gradient maps and used to improve the phases. The GHK copper SAD method provides a convenient way of both crystallizing and phasing macromolecular structures, and will complement the current trend towards native sulfur SAD and MR-SAD phasing.
The copper(II)-binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography.,Mehr A, Henneberg F, Chari A, Gorlich D, Huyton T Acta Crystallogr D Struct Biol. 2020 Dec 1;76(Pt 12):1222-1232. doi:, 10.1107/S2059798320013741. Epub 2020 Nov 19. PMID:33263328[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Mehr A, Henneberg F, Chari A, Gorlich D, Huyton T. The copper(II)-binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography. Acta Crystallogr D Struct Biol. 2020 Dec 1;76(Pt 12):1222-1232. doi:, 10.1107/S2059798320013741. Epub 2020 Nov 19. PMID:33263328 doi:http://dx.doi.org/10.1107/S2059798320013741
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