3rtj: Difference between revisions
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==Crystal structure of ricin bound with dinucleotide ApG== | ==Crystal structure of ricin bound with dinucleotide ApG== | ||
<StructureSection load='3rtj' size='340' side='right' caption='[[3rtj]], [[Resolution|resolution]] 3.00Å' scene=''> | <StructureSection load='3rtj' size='340' side='right'caption='[[3rtj]], [[Resolution|resolution]] 3.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3rtj]] is a 3 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3rtj]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Ricinus_communis Ricinus communis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1apg 1apg]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RTJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RTJ FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>< | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2aai|2aai]], [[3rti|3rti]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2aai|2aai]], [[3rti|3rti]]</div></td></tr> | ||
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/rRNA_N-glycosylase rRNA N-glycosylase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.22 3.2.2.22] </span></td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3rtj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rtj OCA], [https://pdbe.org/3rtj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rtj RCSB], [https://www.ebi.ac.uk/pdbsum/3rtj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rtj ProSAT]</span></td></tr> | ||
<table> | </table> | ||
== Function == | |||
[[https://www.uniprot.org/uniprot/RICI_RICCO RICI_RICCO]] Ricin is highly toxic to animal cells and to a lesser extent to plant cells. The A chain acts as a glycosidase that removes a specific adenine residue from an exposed loop of the 28S rRNA (A4324 in mammals), leading to rRNA breakage. As this loop is involved in elongation factor binding, modified ribosomes are catalytically inactive and unable to support protein synthesis. The A chain can inactivate a few thousand ribosomes per minute, faster than the cell can make new ones. Therefore a single A chain molecule can kill an animal cell. The B chain binds to beta-D-galactopyranoside moieties on cell surface glycoproteins and glycolipids and facilitates the entry into the cell of the A chain; B chains are also responsible for cell agglutination (Lectin activity). | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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X-ray analysis of substrate analogs in the ricin A-chain active site.,Monzingo AF, Robertus JD J Mol Biol. 1992 Oct 20;227(4):1136-45. PMID:1433290<ref>PMID:1433290</ref> | X-ray analysis of substrate analogs in the ricin A-chain active site.,Monzingo AF, Robertus JD J Mol Biol. 1992 Oct 20;227(4):1136-45. PMID:1433290<ref>PMID:1433290</ref> | ||
From | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3rtj" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Ricin|Ricin]] | *[[Ricin|Ricin]] | ||
*[[Ricin 3D structures|Ricin 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Ricinus communis]] | [[Category: Ricinus communis]] | ||
[[Category: RRNA N-glycosylase]] | [[Category: RRNA N-glycosylase]] | ||
[[Category: Monzingo, A F | [[Category: Monzingo, A F]] | ||
[[Category: Robertus, J D | [[Category: Robertus, J D]] | ||
[[Category: Enzyme-substrate complex]] | [[Category: Enzyme-substrate complex]] | ||
[[Category: Glycosidase ribosome-inactivating protein lectin glycoprotein]] | [[Category: Glycosidase ribosome-inactivating protein lectin glycoprotein]] | ||