3bps

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{{STRUCTURE_3bps| PDB=3bps | SCENE= }}
 
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===PCSK9:EGF-A complex===
 
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{{ABSTRACT_PUBMED_18250299}}
 
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==Disease==
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==PCSK9:EGF-A complex==
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[[http://www.uniprot.org/uniprot/PCSK9_HUMAN PCSK9_HUMAN]] Defects in PCSK9 are the cause of hypercholesterolemia autosomal dominant type 3 (HCHOLA3) [MIM:[http://omim.org/entry/603776 603776]]. A familial condition characterized by elevated circulating cholesterol contained in either low-density lipoproteins alone or also in very-low-density lipoproteins.<ref>PMID:12730697</ref> [[http://www.uniprot.org/uniprot/LDLR_HUMAN LDLR_HUMAN]] Defects in LDLR are the cause of familial hypercholesterolemia (FH) [MIM:[http://omim.org/entry/143890 143890]]; a common autosomal semi-dominant disease that affects about 1 in 500 individuals. The receptor defect impairs the catabolism of LDL, and the resultant elevation in plasma LDL-cholesterol promotes deposition of cholesterol in the skin (xanthelasma), tendons (xanthomas), and coronary arteries (atherosclerosis).<ref>PMID:3263645</ref><ref>PMID:2569482</ref><ref>PMID:3955657</ref><ref>PMID:8347689</ref><ref>PMID:2318961</ref><ref>PMID:1446662</ref><ref>PMID:1867200</ref><ref>PMID:8462973</ref><ref>PMID:8168830</ref><ref>PMID:2726768</ref><ref>PMID:1464748</ref><ref>PMID:7573037</ref><ref>PMID:7583548</ref><ref>PMID:7550239</ref><ref>PMID:7635461</ref><ref>PMID:7635482</ref><ref>PMID:7649546</ref><ref>PMID:7649549</ref><ref>PMID:8740918</ref><ref>PMID:8664907</ref><ref>PMID:9026534</ref><ref>PMID:9254862</ref><ref>PMID:9143924</ref><ref>PMID:9259195</ref><ref>PMID:9104431</ref><ref>PMID:9654205</ref><ref>PMID:9452094</ref><ref>PMID:9452095</ref><ref>PMID:9452118</ref><ref>PMID:10206683</ref><ref>PMID:10660340</ref>[:]<ref>PMID:9852677</ref><ref>PMID:9678702</ref><ref>PMID:10422803</ref><ref>PMID:10090484</ref><ref>PMID:10447263</ref><ref>PMID:10978268</ref><ref>PMID:10980548</ref><ref>PMID:10882754</ref><ref>PMID:11298688</ref><ref>PMID:17142622</ref><ref>PMID:19319977</ref><ref>PMID:22160468</ref>
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<StructureSection load='3bps' size='340' side='right'caption='[[3bps]], [[Resolution|resolution]] 2.41&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3bps]] is a 3 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=3BPS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3BPS 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]] 2.41&#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=CA:CALCIUM+ION'>CA</scene></td></tr>
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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=3bps FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bps OCA], [https://pdbe.org/3bps PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3bps RCSB], [https://www.ebi.ac.uk/pdbsum/3bps PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3bps ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/PCSK9_HUMAN PCSK9_HUMAN] Defects in PCSK9 are the cause of hypercholesterolemia autosomal dominant type 3 (HCHOLA3) [MIM:[https://omim.org/entry/603776 603776]. A familial condition characterized by elevated circulating cholesterol contained in either low-density lipoproteins alone or also in very-low-density lipoproteins.<ref>PMID:12730697</ref>
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== Function ==
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[https://www.uniprot.org/uniprot/PCSK9_HUMAN PCSK9_HUMAN] Crucial player in the regulation of plasma cholesterol homeostasis. Binds to low-density lipid receptor family members: low density lipoprotein receptor (LDLR), very low density lipoprotein receptor (VLDLR), apolipoprotein E receptor (LRP1/APOER) and apolipoprotein receptor 2 (LRP8/APOER2), and promotes their degradation in intracellular acidic compartments. Acts via a non-proteolytic mechanism to enhance the degradation of the hepatic LDLR through a clathrin LDLRAP1/ARH-mediated pathway. May prevent the recycling of LDLR from endosomes to the cell surface or direct it to lysosomes for degradation. Can induce ubiquitination of LDLR leading to its subsequent degradation. Inhibits intracellular degradation of APOB via the autophagosome/lysosome pathway in a LDLR-independent manner. Involved in the disposal of non-acetylated intermediates of BACE1 in the early secretory pathway. Inhibits epithelial Na(+) channel (ENaC)-mediated Na(+) absorption by reducing ENaC surface expression primarily by increasing its proteasomal degradation. Regulates neuronal apoptosis via modulation of LRP8/APOER2 levels and related anti-apoptotic signaling pathways.<ref>PMID:17461796</ref> <ref>PMID:18197702</ref> <ref>PMID:18660751</ref> <ref>PMID:18039658</ref> <ref>PMID:22074827</ref> <ref>PMID:22580899</ref> <ref>PMID:22493497</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/bp/3bps_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=3bps 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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Proprotein convertase subtilisin/kexin type 9 (PCSK9) posttranslationally regulates hepatic low-density lipoprotein receptors (LDLRs) by binding to LDLRs on the cell surface, leading to their degradation. The binding site of PCSK9 has been localized to the epidermal growth factor-like repeat A (EGF-A) domain of the LDLR. Here, we describe the crystal structure of a complex between PCSK9 and the EGF-A domain of the LDLR. The binding site for the LDLR EGF-A domain resides on the surface of PCSK9's subtilisin-like catalytic domain containing Asp-374, a residue for which a gain-of-function mutation (Asp-374-Tyr) increases the affinity of PCSK9 toward LDLR and increases plasma LDL-cholesterol (LDL-C) levels in humans. The binding surface on PCSK9 is distant from its catalytic site, and the EGF-A domain makes no contact with either the C-terminal domain or the prodomain. Point mutations in PCSK9 that altered key residues contributing to EGF-A binding (Arg-194 and Phe-379) greatly diminished binding to the LDLR's extracellular domain. The structure of PCSK9 in complex with the LDLR EGF-A domain defines potential therapeutic target sites for blocking agents that could interfere with this interaction in vivo, thereby increasing LDLR function and reducing plasma LDL-C levels.
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==Function==
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Molecular basis for LDL receptor recognition by PCSK9.,Kwon HJ, Lagace TA, McNutt MC, Horton JD, Deisenhofer J Proc Natl Acad Sci U S A. 2008 Feb 12;105(6):1820-5. Epub 2008 Feb 4. PMID:18250299<ref>PMID:18250299</ref>
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[[http://www.uniprot.org/uniprot/PCSK9_HUMAN PCSK9_HUMAN]] Crucial player in the regulation of plasma cholesterol homeostasis. Binds to low-density lipid receptor family members: low density lipoprotein receptor (LDLR), very low density lipoprotein receptor (VLDLR), apolipoprotein E receptor (LRP1/APOER) and apolipoprotein receptor 2 (LRP8/APOER2), and promotes their degradation in intracellular acidic compartments. Acts via a non-proteolytic mechanism to enhance the degradation of the hepatic LDLR through a clathrin LDLRAP1/ARH-mediated pathway. May prevent the recycling of LDLR from endosomes to the cell surface or direct it to lysosomes for degradation. Can induce ubiquitination of LDLR leading to its subsequent degradation. Inhibits intracellular degradation of APOB via the autophagosome/lysosome pathway in a LDLR-independent manner. Involved in the disposal of non-acetylated intermediates of BACE1 in the early secretory pathway. Inhibits epithelial Na(+) channel (ENaC)-mediated Na(+) absorption by reducing ENaC surface expression primarily by increasing its proteasomal degradation. Regulates neuronal apoptosis via modulation of LRP8/APOER2 levels and related anti-apoptotic signaling pathways.<ref>PMID:17461796</ref><ref>PMID:18197702</ref><ref>PMID:18660751</ref><ref>PMID:18039658</ref><ref>PMID:22074827</ref><ref>PMID:22580899</ref><ref>PMID:22493497</ref> [[http://www.uniprot.org/uniprot/LDLR_HUMAN LDLR_HUMAN]] Binds LDL, the major cholesterol-carrying lipoprotein of plasma, and transports it into cells by endocytosis. In order to be internalized, the receptor-ligand complexes must first cluster into clathrin-coated pits. In case of HIV-1 infection, functions as a receptor for extracellular Tat in neurons, mediating its internalization in uninfected cells.
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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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[[3bps]] is a 3 chain structure with sequence 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=3BPS OCA].
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</div>
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<div class="pdbe-citations 3bps" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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<ref group="xtra">PMID:018250299</ref><references group="xtra"/><references/>
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*[[LDL receptor|LDL receptor]]
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*[[PCSK9|PCSK9]]
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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: Kwon, H J.]]
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[[Category: Large Structures]]
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[[Category: Autocatalytic cleavage]]
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[[Category: Kwon HJ]]
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[[Category: Cholesterol metabolism]]
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[[Category: Coated pit]]
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[[Category: Disease mutation]]
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[[Category: Egf-like domain]]
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[[Category: Endocytosis]]
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[[Category: Glycoprotein]]
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[[Category: Host-virus interaction]]
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[[Category: Hydrolase]]
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[[Category: Hydrolase-lipid transport complex]]
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[[Category: Ldl receptor]]
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[[Category: Lipid metabolism]]
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[[Category: Lipid transport]]
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[[Category: Membrane]]
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[[Category: Pcsk9]]
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[[Category: Phosphoprotein]]
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[[Category: Protease]]
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[[Category: Secreted]]
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[[Category: Serine protease]]
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[[Category: Steroid metabolism]]
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[[Category: Transmembrane]]
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[[Category: Transport]]
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[[Category: Zymogen]]
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Current revision

PCSK9:EGF-A complex

PDB ID 3bps

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