5nl4
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of Zn1.3-E16V human ubiquitin (hUb) mutant adduct, from a solution 35 mM zinc acetate/1.3 mM E16V hUb== | |
| + | <StructureSection load='5nl4' size='340' side='right' caption='[[5nl4]], [[Resolution|resolution]] 1.32Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5nl4]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NL4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5NL4 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ehv|3ehv]], [[4k7w|4k7w]], [[4k7u|4k7u]], [[4k7s|4k7s]]</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=5nl4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nl4 OCA], [http://pdbe.org/5nl4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nl4 RCSB], [http://www.ebi.ac.uk/pdbsum/5nl4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nl4 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/UBC_HUMAN UBC_HUMAN]] Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling.<ref>PMID:16543144</ref> <ref>PMID:19754430</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Zinc ions bridging two ubiquitin molecules (with His68 at the interface) contribute to select a subset of conformers from the noncovalent dimer ensemble, thus restricting quaternary structure dynamics, which hampers apo-protein crystallization. The type of selected conformer is shown to determine the crystal packing, which varies from orthorhombic to cubic symmetry. | ||
| - | + | Conformational selection of ubiquitin quaternary structures driven by zinc ions.,Fermani S, Falini G, Calvaresi M, Bottoni A, Calo V, Mangini V, Arnesano F, Natile G Chemistry. 2013 Nov 11;19(46):15480-4. doi: 10.1002/chem.201302229. Epub 2013 Oct, 10. PMID:24123543<ref>PMID:24123543</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 5nl4" style="background-color:#fffaf0;"></div> | |
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
[[Category: Falini, G]] | [[Category: Falini, G]] | ||
| + | [[Category: Fermani, S]] | ||
| + | [[Category: E16v mutant]] | ||
| + | [[Category: Ligase]] | ||
| + | [[Category: Proteasome degradation]] | ||
| + | [[Category: Ubiquitination]] | ||
Revision as of 13:53, 27 April 2017
Crystal structure of Zn1.3-E16V human ubiquitin (hUb) mutant adduct, from a solution 35 mM zinc acetate/1.3 mM E16V hUb
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