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.

2c2v

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 08:25, 23 May 2018

Crystal structure of the CHIP-UBC13-UEV1a complex

Structural highlights

2c2v is a 12 chain structure with sequence from Human and Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	2a4d
Activity:	Ubiquitin--protein ligase, with EC number 6.3.2.19
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CHIP_MOUSE] E3 ubiquitin-protein ligase which targets misfolded chaperone substrates towards proteasomal degradation. Collaborates with ATXN3 in the degradation of misfolded chaperone substrates: ATXN3 restricting the length of ubiquitin chain attached to STUB1/CHIP substrates and preventing further chain extension. Ubiquitinates NOS1 in concert with Hsp70 and Hsp40. Modulates the activity of several chaperone complexes, including Hsp70, Hsc70 and Hsp90. Mediates transfer of non-canonical short ubiquitin chains to HSPA8 that have no effect on HSPA8 degradation. Mediates polyubiquitination of DNA polymerase beta (POLB) at 'Lys-41', 'Lys-61' and 'Lys-81', thereby playing a role in base-excision repair: catalyzes polyubiquitination by amplifying the HUWE1/ARF-BP1-dependent monoubiquitination and leading to POLB-degradation by the proteasome. Mediates polyubiquitination of CYP3A4. Ubiquitinates EPHA2 and may regulate the receptor stability and activity through proteasomal degradation.^[1] [UB2V1_HUMAN] Has no ubiquitin ligase activity on its own. The UBE2V1-UBE2N heterodimer catalyzes the synthesis of non-canonical poly-ubiquitin chains that are linked through Lys-63. This type of poly-ubiquitination activates IKK and does not seem to involve protein degradation by the proteasome. Plays a role in the activation of NF-kappa-B mediated by IL1B, TNF, TRAF6 and TRAF2. Mediates transcriptional activation of target genes. Plays a role in the control of progress through the cell cycle and differentiation. Plays a role in the error-free DNA repair pathway and contributes to the survival of cells after DNA damage. Promotes TRIM5 capsid-specific restriction activity and the UBE2V1-UBE2N heterodimer acts in concert with TRIM5 to generate 'Lys-63'-linked polyubiquitin chains which activate the MAP3K7/TAK1 complex which in turn results in the induction and expression of NF-kappa-B and MAPK-responsive inflammatory genes.^[2] ^[3] ^[4] ^[5] ^[6] ^[7] ^[8]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

CHIP is a dimeric U box E3 ubiquitin ligase that binds Hsp90 and/or Hsp70 via its TPR-domain, facilitating ubiquitylation of chaperone bound client proteins. We have determined the crystal structure of CHIP bound to an Hsp90 C-terminal decapeptide. The structure explains how CHIP associates with either chaperone type and reveals an unusual asymmetric homodimer in which the protomers adopt radically different conformations. Additionally, we identified CHIP as a functional partner of Ubc13-Uev1a in formation of Lys63-linked polyubiquitin chains, extending CHIP's roles into ubiquitin regulation as well as targeted destruction. The structure of Ubc13-Uev1a bound to the CHIP U box domain defines the basis for selective cooperation of CHIP with specific ubiquitin-conjugating enzymes. Remarkably, the asymmetric arrangement of the TPR domains in the CHIP dimer occludes one Ubc binding site, so that CHIP operates with half-of-sites activity, providing an elegant means for coupling a dimeric chaperone to a single ubiquitylation system.

Chaperoned ubiquitylation--crystal structures of the CHIP U box E3 ubiquitin ligase and a CHIP-Ubc13-Uev1a complex.,Zhang M, Windheim M, Roe SM, Peggie M, Cohen P, Prodromou C, Pearl LH Mol Cell. 2005 Nov 23;20(4):525-38. PMID:16307917^[9]

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

References

↑ Scaglione KM, Zavodszky E, Todi SV, Patury S, Xu P, Rodriguez-Lebron E, Fischer S, Konen J, Djarmati A, Peng J, Gestwicki JE, Paulson HL. Ube2w and ataxin-3 coordinately regulate the ubiquitin ligase CHIP. Mol Cell. 2011 Aug 19;43(4):599-612. doi: 10.1016/j.molcel.2011.05.036. PMID:21855799 doi:10.1016/j.molcel.2011.05.036
↑ Rothofsky ML, Lin SL. CROC-1 encodes a protein which mediates transcriptional activation of the human FOS promoter. Gene. 1997 Aug 22;195(2):141-9. PMID:9305758
↑ Sancho E, Vila MR, Sanchez-Pulido L, Lozano JJ, Paciucci R, Nadal M, Fox M, Harvey C, Bercovich B, Loukili N, Ciechanover A, Lin SL, Sanz F, Estivill X, Valencia A, Thomson TM. Role of UEV-1, an inactive variant of the E2 ubiquitin-conjugating enzymes, in in vitro differentiation and cell cycle behavior of HT-29-M6 intestinal mucosecretory cells. Mol Cell Biol. 1998 Jan;18(1):576-89. PMID:9418904
↑ Deng L, Wang C, Spencer E, Yang L, Braun A, You J, Slaughter C, Pickart C, Chen ZJ. Activation of the IkappaB kinase complex by TRAF6 requires a dimeric ubiquitin-conjugating enzyme complex and a unique polyubiquitin chain. Cell. 2000 Oct 13;103(2):351-61. PMID:11057907
↑ Thomson TM, Khalid H, Lozano JJ, Sancho E, Arino J. Role of UEV-1A, a homologue of the tumor suppressor protein TSG101, in protection from DNA damage. FEBS Lett. 1998 Feb 13;423(1):49-52. PMID:9580084
↑ Xiao W, Lin SL, Broomfield S, Chow BL, Wei YF. The products of the yeast MMS2 and two human homologs (hMMS2 and CROC-1) define a structurally and functionally conserved Ubc-like protein family. Nucleic Acids Res. 1998 Sep 1;26(17):3908-14. PMID:9705497
↑ 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
↑ Pertel T, Hausmann S, Morger D, Zuger S, Guerra J, Lascano J, Reinhard C, Santoni FA, Uchil PD, Chatel L, Bisiaux A, Albert ML, Strambio-De-Castillia C, Mothes W, Pizzato M, Grutter MG, Luban J. TRIM5 is an innate immune sensor for the retrovirus capsid lattice. Nature. 2011 Apr 21;472(7343):361-5. doi: 10.1038/nature09976. PMID:21512573 doi:10.1038/nature09976
↑ Zhang M, Windheim M, Roe SM, Peggie M, Cohen P, Prodromou C, Pearl LH. Chaperoned ubiquitylation--crystal structures of the CHIP U box E3 ubiquitin ligase and a CHIP-Ubc13-Uev1a complex. Mol Cell. 2005 Nov 23;20(4):525-38. PMID:16307917 doi:10.1016/j.molcel.2005.09.023

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2c2v"

@@ Line 1: / Line 1: @@
-==CRYSTAL STRUCTURE OF THE CHIP-UBC13-UEV1A COMPLEX==
+==Crystal structure of the CHIP-UBC13-UEV1a complex==
 <StructureSection load='2c2v' size='340' side='right' caption='[[2c2v]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
@@ Line 5: / Line 6: @@
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2a4d|2a4d]]</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=2c2v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2c2v OCA], [http://pdbe.org/2c2v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2c2v RCSB], [http://www.ebi.ac.uk/pdbsum/2c2v 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=2c2v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2c2v OCA], [http://pdbe.org/2c2v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2c2v RCSB], [http://www.ebi.ac.uk/pdbsum/2c2v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2c2v ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c2/2c2v_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c2/2c2v_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

2c2v

From Proteopedia

Revision as of 08:25, 23 May 2018

Crystal structure of the CHIP-UBC13-UEV1a complex

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox