1lm8

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[[Image:1lm8.gif|left|200px]]
 
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==Structure of a HIF-1a-pVHL-ElonginB-ElonginC Complex==
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The line below this paragraph, containing "STRUCTURE_1lm8", creates the "Structure Box" on the page.
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<StructureSection load='1lm8' size='340' side='right'caption='[[1lm8]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1lm8]] is a 4 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=1LM8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LM8 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.85&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HYP:4-HYDROXYPROLINE'>HYP</scene></td></tr>
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{{STRUCTURE_1lm8| PDB=1lm8 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1lm8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lm8 OCA], [https://pdbe.org/1lm8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lm8 RCSB], [https://www.ebi.ac.uk/pdbsum/1lm8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lm8 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ELOB_HUMAN ELOB_HUMAN] SIII, also known as elongin, is a general transcription elongation factor that increases the RNA polymerase II transcription elongation past template-encoded arresting sites. Subunit A is transcriptionally active and its transcription activity is strongly enhanced by binding to the dimeric complex of the SIII regulatory subunits B and C (elongin BC complex).<ref>PMID:7638163</ref> <ref>PMID:15590694</ref> The elongin BC complex seems to be involved as an adapter protein in the proteasomal degradation of target proteins via different E3 ubiquitin ligase complexes, including the von Hippel-Lindau ubiquitination complex CBC(VHL). By binding to BC-box motifs it seems to link target recruitment subunits, like VHL and members of the SOCS box family, to Cullin/RBX1 modules that activate E2 ubiquitination enzymes.<ref>PMID:7638163</ref> <ref>PMID:15590694</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lm/1lm8_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1lm8 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The ubiquitination of the hypoxia-inducible factor (HIF) by the von Hippel-Lindau tumor suppressor (pVHL) plays a central role in the cellular response to changes in oxygen availability. pVHL binds to HIF only when a conserved proline in HIF is hydroxylated, a modification that is oxygen-dependent. The 1.85 angstrom structure of a 20-residue HIF-1alpha peptide-pVHL-ElonginB-ElonginC complex shows that HIF-1alpha binds to pVHL in an extended beta strand-like conformation. The hydroxyproline inserts into a gap in the pVHL hydrophobic core, at a site that is a hotspot for tumorigenic mutations, with its 4-hydroxyl group recognized by buried serine and histidine residues. Although the beta sheet-like interactions contribute to the stability of the complex, the hydroxyproline contacts are central to the strict specificity characteristic of signaling.
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'''Structure of a HIF-1a-pVHL-ElonginB-ElonginC Complex'''
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Structure of an HIF-1alpha -pVHL complex: hydroxyproline recognition in signaling.,Min JH, Yang H, Ivan M, Gertler F, Kaelin WG Jr, Pavletich NP Science. 2002 Jun 7;296(5574):1886-9. Epub 2002 May 9. PMID:12004076<ref>PMID:12004076</ref>
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==Overview==
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The ubiquitination of the hypoxia-inducible factor (HIF) by the von Hippel-Lindau tumor suppressor (pVHL) plays a central role in the cellular response to changes in oxygen availability. pVHL binds to HIF only when a conserved proline in HIF is hydroxylated, a modification that is oxygen-dependent. The 1.85 angstrom structure of a 20-residue HIF-1alpha peptide-pVHL-ElonginB-ElonginC complex shows that HIF-1alpha binds to pVHL in an extended beta strand-like conformation. The hydroxyproline inserts into a gap in the pVHL hydrophobic core, at a site that is a hotspot for tumorigenic mutations, with its 4-hydroxyl group recognized by buried serine and histidine residues. Although the beta sheet-like interactions contribute to the stability of the complex, the hydroxyproline contacts are central to the strict specificity characteristic of signaling.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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1LM8 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LM8 OCA].
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</div>
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<div class="pdbe-citations 1lm8" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Structure of an HIF-1alpha -pVHL complex: hydroxyproline recognition in signaling., Min JH, Yang H, Ivan M, Gertler F, Kaelin WG Jr, Pavletich NP, Science. 2002 Jun 7;296(5574):1886-9. Epub 2002 May 9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12004076 12004076]
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*[[Elongation factor 3D structures|Elongation factor 3D structures]]
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*[[Factor inhibiting HIF|Factor inhibiting HIF]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Protein complex]]
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[[Category: Large Structures]]
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[[Category: Gertler, F.]]
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[[Category: Gertler F]]
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[[Category: Ivan, M.]]
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[[Category: Ivan M]]
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[[Category: JR., W G.Kaelin.]]
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[[Category: Kaelin JR WG]]
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[[Category: Min, J-H]]
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[[Category: Min J-H]]
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[[Category: Pavletich, N P.]]
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[[Category: Pavletich NP]]
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[[Category: Yang, H.]]
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[[Category: Yang H]]
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[[Category: Oxygen sensing]]
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[[Category: Regulation]]
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[[Category: Tumor suppressor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:03:34 2008''
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Current revision

Structure of a HIF-1a-pVHL-ElonginB-ElonginC Complex

PDB ID 1lm8

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