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| | <StructureSection load='4npn' size='340' side='right'caption='[[4npn]], [[Resolution|resolution]] 1.63Å' scene=''> | | <StructureSection load='4npn' size='340' side='right'caption='[[4npn]], [[Resolution|resolution]] 1.63Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4npn]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NPN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NPN FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4npn]] is a 1 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=4NPN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4NPN FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4bkg|4bkg]], [[1wm2|1wm2]], [[1wm3|1wm3]], [[2rpq|2rpq]]</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]] 1.633Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SMT3A, SMT3H2, SUMO2, SUMO2 SMT3A SMT3H2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=4npn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4npn OCA], [https://pdbe.org/4npn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4npn RCSB], [https://www.ebi.ac.uk/pdbsum/4npn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4npn ProSAT]</span></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=4npn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4npn OCA], [http://pdbe.org/4npn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4npn RCSB], [http://www.ebi.ac.uk/pdbsum/4npn PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4npn ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/SUMO2_HUMAN SUMO2_HUMAN]] Ubiquitin-like protein that can be covalently attached to proteins as a monomer or as a lysine-linked polymer. Covalent attachment via an isopeptide bond to its substrates requires prior activation by the E1 complex SAE1-SAE2 and linkage to the E2 enzyme UBE2I, and can be promoted by an E3 ligase such as PIAS1-4, RANBP2 or CBX4. This post-translational modification on lysine residues of proteins plays a crucial role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Polymeric SUMO2 chains are also susceptible to polyubiquitination which functions as a signal for proteasomal degradation of modified proteins.<ref>PMID:9556629</ref> <ref>PMID:18538659</ref> <ref>PMID:18408734</ref> | + | [https://www.uniprot.org/uniprot/SUMO2_HUMAN SUMO2_HUMAN] Ubiquitin-like protein that can be covalently attached to proteins as a monomer or as a lysine-linked polymer. Covalent attachment via an isopeptide bond to its substrates requires prior activation by the E1 complex SAE1-SAE2 and linkage to the E2 enzyme UBE2I, and can be promoted by an E3 ligase such as PIAS1-4, RANBP2 or CBX4. This post-translational modification on lysine residues of proteins plays a crucial role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Polymeric SUMO2 chains are also susceptible to polyubiquitination which functions as a signal for proteasomal degradation of modified proteins.<ref>PMID:9556629</ref> <ref>PMID:18538659</ref> <ref>PMID:18408734</ref> |
| - | <div style="background-color:#fffaf0;">
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| - | == Publication Abstract from PubMed ==
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| - | The E3 ubiquitin ligase RNF4 (RING finger protein 4) contains four tandem SIM [SUMO (small ubiquitin-like modifier)-interaction motif] repeats for selective interaction with poly-SUMO-modified proteins, which it targets for degradation. We employed a multi-faceted approach to characterize the structure of the RNF4-SIMs domain and the tetra-SUMO2 chain to elucidate the interaction between them. In solution, the SIM domain was intrinsically disordered and the linkers of the tetra-SUMO2 were highly flexible. Individual SIMs of the RNF4-SIMs domains bind to SUMO2 in the groove between the beta2-strand and the alpha1-helix parallel to the beta2-strand. SIM2 and SIM3 bound to SUMO with a high affinity and together constituted the recognition module necessary for SUMO binding. SIM4 alone bound to SUMO with low affinity; however, its contribution to tetra-SUMO2 binding avidity is comparable with that of SIM3 when in the RNF4-SIMs domain. The SAXS data of the tetra-SUMO2-RNF4-SIMs domain complex indicate that it exists as an ordered structure. The HADDOCK model showed that the tandem RNF4-SIMs domain bound antiparallel to the tetra-SUMO2 chain orientation and wrapped around the SUMO protamers in a superhelical turn without imposing steric hindrance on either molecule.
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| - | Structural analysis of poly-SUMO chain recognition by the RNF4-SIMs domain.,Kung CC, Naik MT, Wang SH, Shih HM, Chang CC, Lin LY, Chen CL, Ma C, Chang CF, Huang TH Biochem J. 2014 Aug 15;462(1):53-65. doi: 10.1042/BJ20140521. PMID:24844634<ref>PMID:24844634</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | <div class="pdbe-citations 4npn" style="background-color:#fffaf0;"></div>
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| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[SUMO|SUMO]] | + | *[[SUMO 3D Structures|SUMO 3D Structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Chen, C L]] | + | [[Category: Chen CL]] |
| - | [[Category: Huang, T H]] | + | [[Category: Huang TH]] |
| - | [[Category: Kung, C C.H]] | + | [[Category: Kung CC-H]] |
| - | [[Category: Ma, C]] | + | [[Category: Ma C]] |
| - | [[Category: Naik, M T]] | + | [[Category: Naik MT]] |
| - | [[Category: Protein binding]]
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| - | [[Category: Protein transport]]
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