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| | ==Crystal Structure of the Ube2g2:RING-G2BR complex== | | ==Crystal Structure of the Ube2g2:RING-G2BR complex== |
| - | <StructureSection load='4lad' size='340' side='right' caption='[[4lad]], [[Resolution|resolution]] 2.30Å' scene=''> | + | <StructureSection load='4lad' size='340' side='right'caption='[[4lad]], [[Resolution|resolution]] 2.30Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4lad]] is a 2 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=4LAD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4LAD FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4lad]] is a 2 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=4LAD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4LAD FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=OXL:OXALATE+ION'>OXL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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]] 2.3Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2lxh|2lxh]], [[2lxp|2lxp]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=OXL:OXALATE+ION'>OXL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">UBE2G2, Ubiquitin-conjugating enzyme E2G2 isoform 1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), AMFR, Autocrine motility factor receptor, RNF45 ([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=4lad FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lad OCA], [https://pdbe.org/4lad PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4lad RCSB], [https://www.ebi.ac.uk/pdbsum/4lad PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4lad ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ubiquitin--protein_ligase Ubiquitin--protein ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.19 6.3.2.19] </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=4lad FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lad OCA], [http://pdbe.org/4lad PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4lad RCSB], [http://www.ebi.ac.uk/pdbsum/4lad PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4lad ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/UB2G2_HUMAN UB2G2_HUMAN]] Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro catalyzes 'Lys-48'-linked polyubiquitination. Involved in endoplasmic reticulum-associated degradation (ERAD).<ref>PMID:20061386</ref> <ref>PMID:22607976</ref> [[http://www.uniprot.org/uniprot/AMFR_HUMAN AMFR_HUMAN]] E3 ubiquitin-protein ligase that mediates the polyubiquitination of a number of proteins such as CD3D, CYP3A4, CFTR and APOB for proteasomal degradation. Component of a VCP/p97-AMFR/gp78 complex that participates in the final step of endoplasmic reticulum-associated degradation (ERAD). The VCP/p97-AMFR/gp78 complex is involved in the sterol-accelerated ERAD degradation of HMGCR through binding to the HMGCR-INSIG complex at the ER membrane and initiating ubiquitination of HMGCR. The ubiquitinated HMGCR is then released from the ER by the complex into the cytosol for subsequent destruction. Also acts as a scaffold protein to assemble a complex that couples ubiquitination, retranslocation and deglycosylation. Mediates tumor invasion and metastasis as a receptor for the GPI/autocrine motility factor.<ref>PMID:10456327</ref> <ref>PMID:11724934</ref> <ref>PMID:16168377</ref> <ref>PMID:19103148</ref> | + | [https://www.uniprot.org/uniprot/UB2G2_HUMAN UB2G2_HUMAN] Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro catalyzes 'Lys-48'-linked polyubiquitination. Involved in endoplasmic reticulum-associated degradation (ERAD).<ref>PMID:20061386</ref> <ref>PMID:22607976</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Ubiquitin conjugating enzyme|Ubiquitin conjugating enzyme]] | + | *[[Ubiquitin protein ligase 3D structures|Ubiquitin protein ligase 3D structures]] |
| - | *[[Ubiquitin protein ligase|Ubiquitin protein ligase]] | + | *[[3D structures of ubiquitin conjugating enzyme|3D structures of ubiquitin conjugating enzyme]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Ubiquitin--protein ligase]] | + | [[Category: Large Structures]] |
| - | [[Category: Byrd, R A]] | + | [[Category: Byrd RA]] |
| - | [[Category: Das, R]] | + | [[Category: Das R]] |
| - | [[Category: Ji, X]] | + | [[Category: Ji X]] |
| - | [[Category: Li, J]] | + | [[Category: Li J]] |
| - | [[Category: Liang, Y H]] | + | [[Category: Liang Y-H]] |
| - | [[Category: E2:e3 complex]]
| + | |
| - | [[Category: Ligase-ligase complex]]
| + | |
| Structural highlights
Function
UB2G2_HUMAN Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins. In vitro catalyzes 'Lys-48'-linked polyubiquitination. Involved in endoplasmic reticulum-associated degradation (ERAD).[1] [2]
Publication Abstract from PubMed
RING finger proteins constitute the large majority of ubiquitin ligases (E3s) and function by interacting with ubiquitin-conjugating enzymes (E2s) charged with ubiquitin. How low-affinity RING-E2 interactions result in highly processive substrate ubiquitination is largely unknown. The RING E3, gp78, represents an excellent model to study this process. gp78 includes a high-affinity secondary binding region for its cognate E2, Ube2g2, the G2BR. The G2BR allosterically enhances RING:Ube2g2 binding and ubiquitination. Structural analysis of the RING:Ube2g2:G2BR complex reveals that a G2BR-induced conformational effect at the RING:Ube2g2 interface is necessary for enhanced binding of RING to Ube2g2 or Ube2g2 conjugated to Ub. This conformational effect and a key ternary interaction with conjugated ubiquitin are required for ubiquitin transfer. Moreover, RING:Ube2g2 binding induces a second allosteric effect, disrupting Ube2g2:G2BR contacts, decreasing affinity and facilitating E2 exchange. Thus, gp78 is a ubiquitination machine where multiple E2-binding sites coordinately facilitate processive ubiquitination.
Allosteric regulation of E2:E3 interactions promote a processive ubiquitination machine.,Das R, Liang YH, Mariano J, Li J, Huang T, King A, Tarasov SG, Weissman AM, Ji X, Byrd RA EMBO J. 2013 Aug 13. doi: 10.1038/emboj.2013.174. PMID:23942235[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ David Y, Ziv T, Admon A, Navon A. The E2 ubiquitin conjugating enzymes direct polyubiquitination to preferred lysines. J Biol Chem. 2010 Jan 8. PMID:20061386 doi:M109.089003
- ↑ Sato T, Sako Y, Sho M, Momohara M, Suico MA, Shuto T, Nishitoh H, Okiyoneda T, Kokame K, Kaneko M, Taura M, Miyata M, Chosa K, Koga T, Morino-Koga S, Wada I, Kai H. STT3B-dependent posttranslational N-glycosylation as a surveillance system for secretory protein. Mol Cell. 2012 Jul 13;47(1):99-110. doi: 10.1016/j.molcel.2012.04.015. Epub 2012 , May 17. PMID:22607976 doi:10.1016/j.molcel.2012.04.015
- ↑ Das R, Liang YH, Mariano J, Li J, Huang T, King A, Tarasov SG, Weissman AM, Ji X, Byrd RA. Allosteric regulation of E2:E3 interactions promote a processive ubiquitination machine. EMBO J. 2013 Aug 13. doi: 10.1038/emboj.2013.174. PMID:23942235 doi:10.1038/emboj.2013.174
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