This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

4o8x

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 19:34, 4 August 2016

Zinc-bound Rpn11 in complex with Rpn8

Structural highlights

4o8x is a 2 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	4o8y
Gene:	RPN8, YOR261C, O5360 (Baker's yeast), RPN11, MPR1, YFR004W (Baker's yeast)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RPN8_YEAST] Acts as a regulatory subunit of the 26S proteasome which is involved in the ATP-dependent degradation of ubiquitinated proteins.^[1] [RPN11_YEAST] Acts as a regulatory subunit of the 26 proteasome which is involved in the ATP-dependent degradation of ubiquitinated proteins.^[2]

Publication Abstract from PubMed

Polyubiquitin chains target protein substrates to the 26S proteasome, where they are removed by the deubiquitinase Rpn11 to allow efficient substrate degradation. Despite Rpn11's essential function during substrate processing, its detailed structural and biochemical characterization has been hindered by difficulties in purifying the isolated enzyme. Here we report the 2.0-A crystal structures of Zn2+-free and Zn2+-bound Saccharomyces cerevisiae Rpn11 in an MPN-domain heterodimer with Rpn8. The Rpn11-Rpn8 interaction occurs via two distinct interfaces that may be conserved in related MPN-domain complexes. Our structural and mutational studies reveal that Rpn11 lacks a conserved surface to bind the ubiquitin Ile44 patch, does not interact with the moiety on the proximal side of the scissile isopeptide bond and exhibits no linkage specificity for ubiquitin cleavage. These findings explain how Rpn11 functions as a promiscuous deubiquitinase for cotranslocational substrate deubiquitination during proteasomal degradation.

Structure of the Rpn11-Rpn8 dimer reveals mechanisms of substrate deubiquitination during proteasomal degradation.,Worden EJ, Padovani C, Martin A Nat Struct Mol Biol. 2014 Jan 23. doi: 10.1038/nsmb.2771. PMID:24463465^[3]

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

References

↑ Glickman MH, Rubin DM, Fried VA, Finley D. The regulatory particle of the Saccharomyces cerevisiae proteasome. Mol Cell Biol. 1998 Jun;18(6):3149-62. PMID:9584156
↑ Chen L, Romero L, Chuang SM, Tournier V, Joshi KK, Lee JA, Kovvali G, Madura K. Sts1 plays a key role in targeting proteasomes to the nucleus. J Biol Chem. 2011 Jan 28;286(4):3104-18. doi: 10.1074/jbc.M110.135863. Epub 2010 , Nov 12. PMID:21075847 doi:10.1074/jbc.M110.135863
↑ Worden EJ, Padovani C, Martin A. Structure of the Rpn11-Rpn8 dimer reveals mechanisms of substrate deubiquitination during proteasomal degradation. Nat Struct Mol Biol. 2014 Jan 23. doi: 10.1038/nsmb.2771. PMID:24463465 doi:http://dx.doi.org/10.1038/nsmb.2771

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/4o8x"

@@ Line 1: / Line 1: @@
 ==Zinc-bound Rpn11 in complex with Rpn8==
 <StructureSection load='4o8x' size='340' side='right' caption='[[4o8x]], [[Resolution|resolution]] 1.99&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4o8y|4o8y]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RPN8, YOR261C, O5360 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast]), RPN11, MPR1, YFR004W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</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=4o8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o8x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4o8x RCSB], [http://www.ebi.ac.uk/pdbsum/4o8x PDBsum]</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=4o8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o8x OCA], [http://pdbe.org/4o8x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4o8x RCSB], [http://www.ebi.ac.uk/pdbsum/4o8x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4o8x ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4o8x" style="background-color:#fffaf0;"></div>
 ==See Also==

4o8x

From Proteopedia

Revision as of 19:34, 4 August 2016

Zinc-bound Rpn11 in complex with Rpn8

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox