2wnu

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{{Seed}}
 
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[[Image:2wnu.png|left|200px]]
 
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==Complex between c1q globular heads and heparan sulfate==
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The line below this paragraph, containing "STRUCTURE_2wnu", creates the "Structure Box" on the page.
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<StructureSection load='2wnu' size='340' side='right'caption='[[2wnu]], [[Resolution|resolution]] 2.30&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'>[[2wnu]] is a 6 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=2WNU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WNU FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.3&#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=IDU:2-O-SULFO-BETA-L-ALTROPYRANURONIC+ACID'>IDU</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SGN:N,O6-DISULFO-GLUCOSAMINE'>SGN</scene></td></tr>
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{{STRUCTURE_2wnu| PDB=2wnu | 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=2wnu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wnu OCA], [https://pdbe.org/2wnu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2wnu RCSB], [https://www.ebi.ac.uk/pdbsum/2wnu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2wnu ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/C1QA_HUMAN C1QA_HUMAN] Defects in C1QA are a cause of complement component C1q deficiency (C1QD) [MIM:[https://omim.org/entry/613652 613652]. A rare defect resulting in C1 deficiency and impaired activation of the complement classical pathway. C1 deficiency generally leads to severe immune complex disease with features of systemic lupus erythematosus and glomerulonephritis.
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== Function ==
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[https://www.uniprot.org/uniprot/C1QA_HUMAN C1QA_HUMAN] C1q associates with the proenzymes C1r and C1s to yield C1, the first component of the serum complement system. The collagen-like regions of C1q interact with the Ca(2+)-dependent C1r(2)C1s(2) proenzyme complex, and efficient activation of C1 takes place on interaction of the globular heads of C1q with the Fc regions of IgG or IgM antibody present in immune complexes.
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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/wn/2wnu_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=2wnu 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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C1q, the recognition subunit of the C1 complex of complement, is an archetypal pattern recognition molecule with the striking ability to sense a wide variety of targets, including a number of altered self-motifs. The recognition properties of its globular domain were further deciphered by means of x-ray crystallography using deoxy-D-ribose and heparan sulfate as ligands. Highly specific recognition of deoxy-D-ribose, involving interactions with Arg C98, Arg C111, and Asn C113, was observed at 1.2 A resolution. Heparin-derived tetrasaccharide interacted more loosely through Lys C129, Tyr C155, and Trp C190. These data together with previous findings define a unique binding area exhibiting both polyanion and deoxy-D-ribose recognition properties, located on the inner face of C1q. DNA and heparin compete for C1q binding but are poor C1 activators compared with immune complexes. How the location of this binding area in C1q may regulate the level of C1 activation is discussed.
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===COMPLEX BETWEEN C1Q GLOBULAR HEADS AND HEPARAN SULFATE===
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Cutting edge: C1q binds deoxyribose and heparan sulfate through neighboring sites of its recognition domain.,Garlatti V, Chouquet A, Lunardi T, Vives R, Paidassi H, Lortat-Jacob H, Thielens NM, Arlaud GJ, Gaboriaud C J Immunol. 2010 Jul 15;185(2):808-12. Epub 2010 Jun 14. PMID:20548024<ref>PMID:20548024</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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The line below this paragraph, {{ABSTRACT_PUBMED_20548024}}, adds the Publication Abstract to the page
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<div class="pdbe-citations 2wnu" style="background-color:#fffaf0;"></div>
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(as it appears on PubMed at http://www.pubmed.gov), where 20548024 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_20548024}}
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__TOC__
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</StructureSection>
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==About this Structure==
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2WNU is a 6 chains structure with 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=2WNU OCA].
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==Reference==
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<ref group="xtra">PMID:20548024</ref><references group="xtra"/>
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Arlaud, G J.]]
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[[Category: Large Structures]]
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[[Category: Chouquet, A.]]
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[[Category: Arlaud GJ]]
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[[Category: Gaboriaud, C.]]
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[[Category: Chouquet A]]
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[[Category: Garlatti, V.]]
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[[Category: Gaboriaud C]]
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[[Category: Lunardi, T.]]
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[[Category: Garlatti V]]
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[[Category: Thielens, N M.]]
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[[Category: Lunardi T]]
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[[Category: Collagen]]
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[[Category: Thielens NM]]
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[[Category: Complement pathway]]
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[[Category: Disease mutation]]
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[[Category: Glycoprotein]]
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[[Category: Hydroxylation]]
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[[Category: Immune response]]
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[[Category: Immune system]]
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[[Category: Innate immunity]]
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[[Category: Pyrrolidone carboxylic acid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jun 30 13:21:24 2010''
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Current revision

Complex between c1q globular heads and heparan sulfate

PDB ID 2wnu

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