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| | ==Crystal Structure of double mutant Y115E Y117E human Glutaminyl Cyclase== | | ==Crystal Structure of double mutant Y115E Y117E human Glutaminyl Cyclase== |
| - | <StructureSection load='4yu9' size='340' side='right' caption='[[4yu9]], [[Resolution|resolution]] 2.10Å' scene=''> | + | <StructureSection load='4yu9' size='340' side='right'caption='[[4yu9]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4yu9]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4YU9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4YU9 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4yu9]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4YU9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4YU9 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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]] 2.1Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glutaminyl-peptide_cyclotransferase Glutaminyl-peptide cyclotransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.2.5 2.3.2.5] </span></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=4yu9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4yu9 OCA], [http://pdbe.org/4yu9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4yu9 RCSB], [http://www.ebi.ac.uk/pdbsum/4yu9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4yu9 ProSAT]</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=4yu9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4yu9 OCA], [https://pdbe.org/4yu9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4yu9 RCSB], [https://www.ebi.ac.uk/pdbsum/4yu9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4yu9 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/QPCT_HUMAN QPCT_HUMAN]] Responsible for the biosynthesis of pyroglutamyl peptides. Has a bias against acidic and tryptophan residues adjacent to the N-terminal glutaminyl residue and a lack of importance of chain length after the second residue. Also catalyzes N-terminal pyroglutamate formation. In vitro, catalyzes pyroglutamate formation of N-terminally truncated form of APP amyloid-beta peptides [Glu-3]-beta-amyloid. May be involved in the N-terminal pyroglutamate formation of several amyloid-related plaque-forming peptides.<ref>PMID:15063747</ref> <ref>PMID:18486145</ref> <ref>PMID:21288892</ref> | + | [https://www.uniprot.org/uniprot/QPCT_HUMAN QPCT_HUMAN] Responsible for the biosynthesis of pyroglutamyl peptides. Has a bias against acidic and tryptophan residues adjacent to the N-terminal glutaminyl residue and a lack of importance of chain length after the second residue. Also catalyzes N-terminal pyroglutamate formation. In vitro, catalyzes pyroglutamate formation of N-terminally truncated form of APP amyloid-beta peptides [Glu-3]-beta-amyloid. May be involved in the N-terminal pyroglutamate formation of several amyloid-related plaque-forming peptides.<ref>PMID:15063747</ref> <ref>PMID:18486145</ref> <ref>PMID:21288892</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 4yu9" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 4yu9" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Glutaminyl cyclase|Glutaminyl cyclase]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Glutaminyl-peptide cyclotransferase]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Benvenuti, M]] | + | [[Category: Large Structures]] |
| - | [[Category: Mangani, S]] | + | [[Category: Benvenuti M]] |
| - | [[Category: Pisa, F Di]] | + | [[Category: Di Pisa F]] |
| - | [[Category: Pozzi, C]] | + | [[Category: Mangani S]] |
| - | [[Category: Alzheimer disease]] | + | [[Category: Pozzi C]] |
| - | [[Category: Drug target]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
QPCT_HUMAN Responsible for the biosynthesis of pyroglutamyl peptides. Has a bias against acidic and tryptophan residues adjacent to the N-terminal glutaminyl residue and a lack of importance of chain length after the second residue. Also catalyzes N-terminal pyroglutamate formation. In vitro, catalyzes pyroglutamate formation of N-terminally truncated form of APP amyloid-beta peptides [Glu-3]-beta-amyloid. May be involved in the N-terminal pyroglutamate formation of several amyloid-related plaque-forming peptides.[1] [2] [3]
Publication Abstract from PubMed
Recent developments in molecular pathology and genetics have allowed the identification of human glutaminyl cyclase (hQC) among the abnormal proteins involved in many neurodegenerative disorders. Difficulties in obtaining large quantities of pure protein may limit the use of crystallographic screening for drug development on this target. Site-directed mutagenesis experiments have led to the identification of some solvent-exposed residues that are absolutely critical to achieve increased solubility and to avoid precipitation of the enzyme in inclusion bodies when expressed in Escherichia coli. The designed variant Y115E-Y117E has been found to be able to provide large amounts of monodisperse, pure hQC from an E. coli expression system. To validate the use of the artificial construct as a target for large-scale X-ray and NMR screening campaigns in the search for new inhibitors of hQC, the X-ray crystal structures of the hQC Y115E-Y117E variant and of its adduct with the inhibitor PBD-150 were determined.
The soluble Y115E-Y117E variant of human glutaminyl cyclase is a valid target for X-ray and NMR screening of inhibitors against Alzheimer disease.,DiPisa F, Pozzi C, Benvenuti M, Andreini M, Marconi G, Mangani S Acta Crystallogr F Struct Biol Commun. 2015 Aug 1;71(Pt 8):986-92. doi:, 10.1107/S2053230X15010389. Epub 2015 Jul 28. PMID:26249687[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Schilling S, Hoffmann T, Manhart S, Hoffmann M, Demuth HU. Glutaminyl cyclases unfold glutamyl cyclase activity under mild acid conditions. FEBS Lett. 2004 Apr 9;563(1-3):191-6. PMID:15063747 doi:http://dx.doi.org/10.1016/S0014-5793(04)00300-X
- ↑ Cynis H, Rahfeld JU, Stephan A, Kehlen A, Koch B, Wermann M, Demuth HU, Schilling S. Isolation of an isoenzyme of human glutaminyl cyclase: retention in the Golgi complex suggests involvement in the protein maturation machinery. J Mol Biol. 2008 Jun 20;379(5):966-80. doi: 10.1016/j.jmb.2008.03.078. Epub 2008 , Apr 15. PMID:18486145 doi:http://dx.doi.org/10.1016/j.jmb.2008.03.078
- ↑ Huang KF, Liaw SS, Huang WL, Chia CY, Lo YC, Chen YL, Wang AH. Structures of human Golgi-resident glutaminyl cyclase and its complexes with inhibitors reveal a large loop movement upon inhibitor binding. J Biol Chem. 2011 Apr 8;286(14):12439-49. Epub 2011 Feb 1. PMID:21288892 doi:10.1074/jbc.M110.208595
- ↑ DiPisa F, Pozzi C, Benvenuti M, Andreini M, Marconi G, Mangani S. The soluble Y115E-Y117E variant of human glutaminyl cyclase is a valid target for X-ray and NMR screening of inhibitors against Alzheimer disease. Acta Crystallogr F Struct Biol Commun. 2015 Aug 1;71(Pt 8):986-92. doi:, 10.1107/S2053230X15010389. Epub 2015 Jul 28. PMID:26249687 doi:http://dx.doi.org/10.1107/S2053230X15010389
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