6jxx

From Proteopedia

(Difference between revisions)

Revision as of 07:10, 27 May 2020

SUMO2 bound to phosphorylated SLS4-SIM peptide from ICP0

Structural highlights

6jxx is a 2 chain structure with sequence from Human. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Gene:	SUMO2 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[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.^[1] ^[2] ^[3]

Publication Abstract from PubMed

When the herpes simplex virus (HSV) genome enters the nucleus for replication and transcription, phase-segregated nuclear protein bodies called Promyelocytic leukemia protein nuclear bodies (PML NBs) colocalize with the genome and repress it. HSV encodes a small ubiquitin-like modifier (SUMO)-targeted ubiquitin ligase (STUbL) infected cell polypeptide 0 (ICP0) that degrades PML NBs to alleviate the repression. The molecular details of the mechanism used by ICP0 to target PML NBs are unclear. Here, we identify a bona fide SUMO-interacting motif in ICP0 (SIM-like sequence [SLS] 4) that is essential and sufficient to target SUMOylated proteins in PML NBs such as the PML and Sp100. We shown that phosphorylation of SLS4 creates new salt bridges between SUMO and SLS4, increases the SUMO/SLS4 affinity, and switches ICP0 into a potent STUbL. HSV activates the Ataxia-telangiectasia-mutated kinase-Checkpoint kinase 2 (ATM-Chk2) pathway to regulate the cell cycle of the host. We report that the activated Chk2 also phosphorylates ICP0 at SLS4 and enhances its STUbL activity. Our results uncover that a viral STUbL counters antiviral response by exploiting an unprecedented cross-talk of three post-translational modifications: ubiquitination, SUMOylation, and phosphorylation.

The Viral SUMO-Targeted Ubiquitin Ligase ICP0 is Phosphorylated and Activated by Host Kinase Chk2.,Hembram DSS, Negi H, Biswas P, Tripathi V, Bhushan L, Shet D, Kumar V, Das R J Mol Biol. 2020 Jan 27. pii: S0022-2836(20)30073-5. doi:, 10.1016/j.jmb.2020.01.021. PMID:32001251^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Kamitani T, Kito K, Nguyen HP, Fukuda-Kamitani T, Yeh ET. Characterization of a second member of the sentrin family of ubiquitin-like proteins. J Biol Chem. 1998 May 1;273(18):11349-53. PMID:9556629
↑ 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
↑ Tatham MH, Geoffroy MC, Shen L, Plechanovova A, Hattersley N, Jaffray EG, Palvimo JJ, Hay RT. RNF4 is a poly-SUMO-specific E3 ubiquitin ligase required for arsenic-induced PML degradation. Nat Cell Biol. 2008 May;10(5):538-46. doi: 10.1038/ncb1716. Epub 2008 Apr 13. PMID:18408734 doi:10.1038/ncb1716
↑ Hembram DSS, Negi H, Biswas P, Tripathi V, Bhushan L, Shet D, Kumar V, Das R. The Viral SUMO-Targeted Ubiquitin Ligase ICP0 is Phosphorylated and Activated by Host Kinase Chk2. J Mol Biol. 2020 Jan 27. pii: S0022-2836(20)30073-5. doi:, 10.1016/j.jmb.2020.01.021. PMID:32001251 doi:http://dx.doi.org/10.1016/j.jmb.2020.01.021

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6jxx"

@@ Line 3: / Line 3: @@
 <StructureSection load='6jxx' size='340' side='right'caption='[[6jxx]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6jxx]] 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=6JXX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6JXX FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6jxx]] 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=6JXX OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6JXX 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>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SUMO2 ([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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6jxx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6jxx OCA], [http://pdbe.org/6jxx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6jxx RCSB], [http://www.ebi.ac.uk/pdbsum/6jxx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6jxx ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6jxx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6jxx OCA], [http://pdbe.org/6jxx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6jxx RCSB], [http://www.ebi.ac.uk/pdbsum/6jxx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6jxx ProSAT]</span></td></tr>
 </table>
 == Function ==

6jxx

From Proteopedia

Revision as of 07:10, 27 May 2020

SUMO2 bound to phosphorylated SLS4-SIM peptide from ICP0

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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