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| | ==Complex of SUMO2 with Phosphorylated viral SIM IE2== | | ==Complex of SUMO2 with Phosphorylated viral SIM IE2== |
| - | <StructureSection load='6k5r' size='340' side='right'caption='[[6k5r]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='6k5r' size='340' side='right'caption='[[6k5r]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6k5r]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6K5R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6K5R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6k5r]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Human_herpesvirus_5_strain_AD169 Human herpesvirus 5 strain AD169]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6K5R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6K5R FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SUMO3, SMT3A, SMT3H1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</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=6k5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6k5r OCA], [http://pdbe.org/6k5r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6k5r RCSB], [http://www.ebi.ac.uk/pdbsum/6k5r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6k5r 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=6k5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6k5r OCA], [https://pdbe.org/6k5r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6k5r RCSB], [https://www.ebi.ac.uk/pdbsum/6k5r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6k5r ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/SUMO3_HUMAN SUMO3_HUMAN]] Ubiquitin-like protein which can be covalently attached to target lysines either as a monomer or as a lysine-linked polymer. Does not seem to be involved in protein degradation and may function as an antagonist of ubiquitin in the degradation process. Plays a role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Covalent attachment 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.<ref>PMID:11451954</ref> <ref>PMID:18538659</ref> [[http://www.uniprot.org/uniprot/VIE2_HCMVA VIE2_HCMVA]] Stimulates viral early and late gene expression and thus play a crucial role in the regulation of productive infection. In addition, activates quiescent cells to reenter the cell cycle and upregulates several E2F-responsive genes, which are responsible for pushing the cell into S phase. In S-phase, inhibits cellular DNA synthesis and blocks further cell cycle progression.<ref>PMID:10516036</ref> <ref>PMID:19812159</ref> | + | [https://www.uniprot.org/uniprot/SUMO3_HUMAN SUMO3_HUMAN] Ubiquitin-like protein which can be covalently attached to target lysines either as a monomer or as a lysine-linked polymer. Does not seem to be involved in protein degradation and may function as an antagonist of ubiquitin in the degradation process. Plays a role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Covalent attachment 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.<ref>PMID:11451954</ref> <ref>PMID:18538659</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 6k5r" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 6k5r" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[SUMO 3D Structures|SUMO 3D Structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | + | [[Category: Human herpesvirus 5 strain AD169]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Chatterjee, K S]] | + | [[Category: Chatterjee KS]] |
| - | [[Category: Das, R]] | + | [[Category: Das R]] |
| - | [[Category: Complex]]
| + | |
| - | [[Category: Protein binding-transcription complex]]
| + | |
| Structural highlights
Function
SUMO3_HUMAN Ubiquitin-like protein which can be covalently attached to target lysines either as a monomer or as a lysine-linked polymer. Does not seem to be involved in protein degradation and may function as an antagonist of ubiquitin in the degradation process. Plays a role in a number of cellular processes such as nuclear transport, DNA replication and repair, mitosis and signal transduction. Covalent attachment 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.[1] [2]
Publication Abstract from PubMed
Many viral factors manipulate the host post-translational modification (PTM) machinery for efficient viral replication. In particular, phosphorylation and SUMOylation can distinctly regulate the activity of the human cytomegalovirus (HCMV) transactivator immediate early 2 (IE2). However, the molecular mechanism of this process is unknown. Using various structural, biochemical, and cell-based approaches, here we uncovered that IE2 exploits a cross-talk between phosphorylation and SUMOylation. A scan for small ubiquitin-like modifier (SUMO)-interacting motifs (SIMs) revealed two SIMs in IE2, and a real-time SUMOylation assay indicated that the N-terminal SIM (IE2-SIM1) enhances IE2 SUMOylation up to 4-fold. Kinetic analysis and structural studies disclosed that IE2 is a SUMO cis-E3 ligase. We also found that two putative casein kinase 2 (CK2) sites adjacent to IE2-SIM1 are phosphorylated in vitro and in cells. The phosphorylation drastically increased IE2-SUMO affinity, IE2 SUMOylation, and cis-E3 activity of IE2. Additional salt bridges between the phosphoserines and SUMO accounted for the increased IE2-SUMO affinity. Phosphorylation also enhanced the SUMO-dependent transactivation activity and auto-repression activity of IE2. Together, our findings highlight a novel mechanism whereby SUMOylation and phosphorylation of the viral cis-E3 ligase and transactivator protein IE2 work in tandem to enable transcriptional regulation of viral gene.
Casein kinase-2-mediated phosphorylation increases the SUMO-dependent activity of the cytomegalovirus transactivator IE2.,Tripathi V, Chatterjee KS, Das R J Biol Chem. 2019 Oct 4;294(40):14546-14561. doi: 10.1074/jbc.RA119.009601. Epub , 2019 Aug 1. PMID:31371453[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Tatham MH, Jaffray E, Vaughan OA, Desterro JM, Botting CH, Naismith JH, Hay RT. Polymeric chains of SUMO-2 and SUMO-3 are conjugated to protein substrates by SAE1/SAE2 and Ubc9. J Biol Chem. 2001 Sep 21;276(38):35368-74. Epub 2001 Jul 12. PMID:11451954 doi:10.1074/jbc.M104214200
- ↑ Meulmeester E, Kunze M, Hsiao HH, Urlaub H, Melchior F. Mechanism and consequences for paralog-specific sumoylation of ubiquitin-specific protease 25. Mol Cell. 2008 Jun 6;30(5):610-9. doi: 10.1016/j.molcel.2008.03.021. PMID:18538659 doi:10.1016/j.molcel.2008.03.021
- ↑ Tripathi V, Chatterjee KS, Das R. Casein kinase-2-mediated phosphorylation increases the SUMO-dependent activity of the cytomegalovirus transactivator IE2. J Biol Chem. 2019 Oct 4;294(40):14546-14561. doi: 10.1074/jbc.RA119.009601. Epub , 2019 Aug 1. PMID:31371453 doi:http://dx.doi.org/10.1074/jbc.RA119.009601
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