View source for 1sac


==THE STRUCTURE OF PENTAMERIC HUMAN SERUM AMYLOID P COMPONENT==
<StructureSection load='1sac' size='340' side='right'caption='[[1sac]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1sac]] is a 5 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=1SAC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SAC FirstGlance]. <br>
</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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1sac FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sac OCA], [https://pdbe.org/1sac PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sac RCSB], [https://www.ebi.ac.uk/pdbsum/1sac PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sac ProSAT]</span></td></tr>
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== Disease ==
[https://www.uniprot.org/uniprot/SAMP_HUMAN SAMP_HUMAN] Note=SAP is a precursor of amyloid component P which is found in basement membrane and associated with amyloid deposits.
== Function ==
[https://www.uniprot.org/uniprot/SAMP_HUMAN SAMP_HUMAN] Can interact with DNA and histones and may scavenge nuclear material released from damaged circulating cells. May also function as a calcium-dependent lectin.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/sa/1sac_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1sac ConSurf].
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== Publication Abstract from PubMed ==
The three-dimensional structure of pentameric human serum amyloid P component at high resolution, the first reported for a pentraxin, reveals that the tertiary fold is remarkably similar to that of the legume lectins. Carboxylate and phosphate compounds bind directly to two calcium ions; interactions with a carboxyethylidene ring are mediated by Asn 59 and Gln 148 ligands of the calcium ions. These X-ray results indicate the probable modes of binding of the biologically important ligands, DNA and amyloid fibrils.

Structure of pentameric human serum amyloid P component.,Emsley J, White HE, O'Hara BP, Oliva G, Srinivasan N, Tickle IJ, Blundell TL, Pepys MB, Wood SP Nature. 1994 Jan 27;367(6461):338-45. PMID:8114934<ref>PMID:8114934</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1sac" style="background-color:#fffaf0;"></div>

==See Also==
*[[Serum amyloid P-component|Serum amyloid P-component]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Blundell TL]]
[[Category: Emsley J]]
[[Category: O'Hara BP]]
[[Category: Oliva G]]
[[Category: Pepys MB]]
[[Category: Srinivasan N]]
[[Category: Tickle IJ]]
[[Category: White HE]]
[[Category: Wood SP]]