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.

5fey

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 06:52, 6 October 2017

TRIM32 RING

Structural highlights

5fey is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[TRI32_HUMAN] Defects in TRIM32 are the cause of limb-girdle muscular dystrophy type 2H (LGMD2H) [MIM:254110]; also known as muscular dystrophy Hutterite type. LGMD2H is an autosomal recessive degenerative myopathy characterized by pelvic girdle, shoulder girdle and quadriceps muscle weakness. Clinical phenotype and severity are highly variable. Disease progression is slow and most patients remain ambulatory into the sixth decade of life.^[1] ^[2] Defects in TRIM32 are the cause of Bardet-Biedl syndrome type 11 (BBS11) [MIM:209900]. Bardet-Biedl syndrome (BBS) is a genetically heterogeneous, autosomal recessive disorder characterized by usually severe pigmentary retinopathy, early onset obesity, polydactyly, hypogenitalism, renal malformation and mental retardation. Secondary features include diabetes mellitus, hypertension and congenital heart disease. A relatively high incidence of BBS is found in the mixed Arab populations of Kuwait and in Bedouin tribes throughout the Middle East, most likely due to the high rate of consaguinity in these populations and a founder effect.^[3]

Function

[TRI32_HUMAN] Has an E3 ubiquitin ligase activity. Ubiquitinates DTNBP1 (dysbindin) and promotes its degradation. May play a significant role in mediating the biological activity of the HIV-1 Tat protein in vivo. Binds specifically to the activation domain of HIV-1 Tat and can also interact with the HIV-2 and EIAV Tat proteins in vivo.^[4]

Publication Abstract from PubMed

TRIM E3 ubiquitin ligases regulate a wide variety of cellular processes and are particularly important during innate immune signalling events. They are characterized by a conserved tripartite motif in their N-terminal portion which comprises a canonical RING domain, one or two B-box domains and a coiled-coil region that mediates ligase dimerization. Self-association via the coiled-coil has been suggested to be crucial for catalytic activity of TRIMs; however, the precise molecular mechanism underlying this observation remains elusive. Here, we provide a detailed characterization of the TRIM ligases TRIM25 and TRIM32 and show how their oligomeric state is linked to catalytic activity. The crystal structure of a complex between the TRIM25 RING domain and an ubiquitin-loaded E2 identifies the structural and mechanistic features that promote a closed E2~Ub conformation to activate the thioester for ubiquitin transfer allowing us to propose a model for the regulation of activity in the full-length protein. Our data reveal an unexpected diversity in the self-association mechanism of TRIMs that might be crucial for their biological function.

Functional role of TRIM E3 ligase oligomerization and regulation of catalytic activity.,Koliopoulos MG, Esposito D, Christodoulou E, Taylor IA, Rittinger K EMBO J. 2016 May 6. pii: e201593741. PMID:27154206^[5]

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

References

↑ Frosk P, Weiler T, Nylen E, Sudha T, Greenberg CR, Morgan K, Fujiwara TM, Wrogemann K. Limb-girdle muscular dystrophy type 2H associated with mutation in TRIM32, a putative E3-ubiquitin-ligase gene. Am J Hum Genet. 2002 Mar;70(3):663-72. Epub 2002 Jan 29. PMID:11822024 doi:S0002-9297(07)60269-9
↑ Saccone V, Palmieri M, Passamano L, Piluso G, Meroni G, Politano L, Nigro V. Mutations that impair interaction properties of TRIM32 associated with limb-girdle muscular dystrophy 2H. Hum Mutat. 2008 Feb;29(2):240-7. PMID:17994549 doi:10.1002/humu.20633
↑ Chiang AP, Beck JS, Yen HJ, Tayeh MK, Scheetz TE, Swiderski RE, Nishimura DY, Braun TA, Kim KY, Huang J, Elbedour K, Carmi R, Slusarski DC, Casavant TL, Stone EM, Sheffield VC. Homozygosity mapping with SNP arrays identifies TRIM32, an E3 ubiquitin ligase, as a Bardet-Biedl syndrome gene (BBS11). Proc Natl Acad Sci U S A. 2006 Apr 18;103(16):6287-92. Epub 2006 Apr 10. PMID:16606853 doi:10.1073/pnas.0600158103
↑ Locke M, Tinsley CL, Benson MA, Blake DJ. TRIM32 is an E3 ubiquitin ligase for dysbindin. Hum Mol Genet. 2009 Jul 1;18(13):2344-58. doi: 10.1093/hmg/ddp167. Epub 2009 Apr , 6. PMID:19349376 doi:10.1093/hmg/ddp167
↑ Koliopoulos MG, Esposito D, Christodoulou E, Taylor IA, Rittinger K. Functional role of TRIM E3 ligase oligomerization and regulation of catalytic activity. EMBO J. 2016 May 6. pii: e201593741. PMID:27154206 doi:http://dx.doi.org/10.15252/embj.201593741

1 Structural highlights
2 Disease
3 Function
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/5fey"

@@ Line 5: / Line 5: @@
 <table><tr><td colspan='2'>[[5fey]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5FEY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5FEY FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=5fey FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5fey OCA], [http://pdbe.org/5fey PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5fey RCSB], [http://www.ebi.ac.uk/pdbsum/5fey 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=5fey FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5fey OCA], [http://pdbe.org/5fey PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5fey RCSB], [http://www.ebi.ac.uk/pdbsum/5fey PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5fey ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 20: / Line 20: @@
 </div>
 <div class="pdbe-citations 5fey" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Ubiquitin protein ligase|Ubiquitin protein ligase]]
 == References ==
 <references/>

5fey

From Proteopedia

Revision as of 06:52, 6 October 2017

TRIM32 RING

Structural highlights

Disease

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox