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| | ==Solution structure of a Ubiquitin/UIM fusion protein== | | ==Solution structure of a Ubiquitin/UIM fusion protein== |
| - | <StructureSection load='2kdi' size='340' side='right'caption='[[2kdi]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='2kdi' size='340' side='right'caption='[[2kdi]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2kdi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KDI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KDI FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2kdi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KDI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KDI FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SCRG_04109, SCRG_05320,VPS27, DID7, GRD11, SSV17, VPL23, VPT27, YNR006W, N2038 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr> | + | </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=2kdi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kdi OCA], [https://pdbe.org/2kdi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2kdi RCSB], [https://www.ebi.ac.uk/pdbsum/2kdi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2kdi 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=2kdi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kdi OCA], [https://pdbe.org/2kdi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2kdi RCSB], [https://www.ebi.ac.uk/pdbsum/2kdi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2kdi ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/UBI4P_YEAST UBI4P_YEAST] 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, and DNA-damage responses. 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 (By similarity). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 18824]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Garcia, A E]] | + | [[Category: Saccharomyces cerevisiae]] |
| - | [[Category: Makhatadze, G I]] | + | [[Category: Garcia AE]] |
| - | [[Category: McCallum, S A]] | + | [[Category: Makhatadze GI]] |
| - | [[Category: Patel, M M]] | + | [[Category: McCallum SA]] |
| - | [[Category: Sgourakis, N G]] | + | [[Category: Patel MM]] |
| - | [[Category: Endosome]] | + | [[Category: Sgourakis NG]] |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Phosphoprotein]]
| + | |
| - | [[Category: Protein domain interface]]
| + | |
| - | [[Category: Signaling protein]]
| + | |
| - | [[Category: Ubiquitin]]
| + | |
| - | [[Category: Ubiquitin interacting motif]]
| + | |
| - | [[Category: Uim]]
| + | |
| - | [[Category: Zinc]]
| + | |
| - | [[Category: Zinc-finger]]
| + | |
| Structural highlights
Function
UBI4P_YEAST 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, and DNA-damage responses. 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 (By similarity).
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
Ubiquitin-interacting motifs (UIMs) are an important class of protein domains that interact with ubiquitin or ubiquitin-like proteins. These approximately 20-residue-long domains are found in a variety of ubiquitin receptor proteins and serve as recognition modules towards intracellular targets, which may be individual ubiquitin subunits or polyubiquitin chains attached to a variety of proteins. Previous structural studies of interactions between UIMs and ubiquitin have shown that UIMs adopt an extended structure of a single alpha-helix, containing a hydrophobic surface with a conserved sequence pattern that interacts with key hydrophobic residues on ubiquitin. In light of this large body of structural studies, details regarding the presence and the roles of structural dynamics and plasticity are surprisingly lacking. In order to better understand the structural basis of ubiquitin-UIM recognition, we have characterized changes in the structure and dynamics of ubiquitin upon binding of a UIM domain from the yeast Vps27 protein. The solution structure of a ubiquitin-UIM fusion protein designed to study these interactions is reported here and found to consist of a well-defined ubiquitin core and a bipartite UIM helix. Moreover, we have studied the plasticity of the docking interface, as well as global changes in ubiquitin due to UIM binding at the picoseconds-to-nanoseconds and microseconds-to-milliseconds protein motions by nuclear magnetic resonance relaxation. Changes in generalized-order parameters of amide groups show a distinct trend towards increased structural rigidity at the UIM-ubiquitin interface relative to values determined in unbound ubiquitin. Analysis of (15)N Carr-Purcell-Meiboom-Gill relaxation dispersion measurements suggests the presence of two types of motions: one directly related to the UIM-binding interface and the other induced to distal parts of the protein. This study demonstrates a case where localized interactions among protein domains have global effects on protein motions at timescales ranging from picoseconds to milliseconds.
Conformational dynamics and structural plasticity play critical roles in the ubiquitin recognition of a UIM domain.,Sgourakis NG, Patel MM, Garcia AE, Makhatadze GI, McCallum SA J Mol Biol. 2010 Mar 5;396(4):1128-44. Epub 2010 Jan 4. PMID:20053359[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Sgourakis NG, Patel MM, Garcia AE, Makhatadze GI, McCallum SA. Conformational dynamics and structural plasticity play critical roles in the ubiquitin recognition of a UIM domain. J Mol Biol. 2010 Mar 5;396(4):1128-44. Epub 2010 Jan 4. PMID:20053359 doi:10.1016/j.jmb.2009.12.052
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