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New page: left|200px<br /><applet load="1hwp" size="450" color="white" frame="true" align="right" spinBox="true" caption="1hwp, resolution 3.1Å" /> '''EBULIN COMPLEXED WITH...
 
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[[Image:1hwp.gif|left|200px]]<br /><applet load="1hwp" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1hwp, resolution 3.1&Aring;" />
'''EBULIN COMPLEXED WITH PTEROIC ACID, TRIGONAL CRYSTAL FORM'''<br />


==Overview==
==EBULIN COMPLEXED WITH PTEROIC ACID, TRIGONAL CRYSTAL FORM==
Ebulin l is a type-II ribosome-inactivating protein (RIP) isolated from, the leaves of Sambucus ebulus L. As with other type-II RIP, ebulin is a, disulfide-linked heterodimer composed of a toxic A chain and a, galactoside-specific lectin B chain. A normal level of, ribosome-inactivating N-glycosidase activity, characteristic of the A, chain of type-II RIP, has been demonstrated for ebulin l. However, ebulin, is considered a nontoxic type-II RIP due to a reduced cytotoxicity on, whole cells and animals as compared with other toxic type-II RIP like, ricin. The molecular cloning, amino acid sequence, and the crystal, structure of ebulin l are presented and compared with ricin. Ebulin l is, shown to bind an A-chain substrate analogue, pteroic acid, in the same, manner as ricin. The galactoside-binding ability of ebulin l is, demonstrated crystallographically with a complex of the B chain with, galactose and with lactose. The negligible cytotoxicity of ebulin l is, apparently due to a reduced affinity for galactosides. An altered mode of, galactoside binding in the 2gamma subdomain of the lectin B chain, primarily causes the reduced affinity.
<StructureSection load='1hwp' size='340' side='right'caption='[[1hwp]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1hwp]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Sambucus_ebulus Sambucus ebulus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HWP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HWP 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]] 3.1&#8491;</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=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PRD_900004:beta-lactose'>PRD_900004</scene>, <scene name='pdbligand=PT1:PTEROIC+ACID'>PT1</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=1hwp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hwp OCA], [https://pdbe.org/1hwp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hwp RCSB], [https://www.ebi.ac.uk/pdbsum/1hwp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hwp ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9AVR2_SAMEB Q9AVR2_SAMEB]
== 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/hw/1hwp_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=1hwp ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Ebulin l is a type-II ribosome-inactivating protein (RIP) isolated from the leaves of Sambucus ebulus L. As with other type-II RIP, ebulin is a disulfide-linked heterodimer composed of a toxic A chain and a galactoside-specific lectin B chain. A normal level of ribosome-inactivating N-glycosidase activity, characteristic of the A chain of type-II RIP, has been demonstrated for ebulin l. However, ebulin is considered a nontoxic type-II RIP due to a reduced cytotoxicity on whole cells and animals as compared with other toxic type-II RIP like ricin. The molecular cloning, amino acid sequence, and the crystal structure of ebulin l are presented and compared with ricin. Ebulin l is shown to bind an A-chain substrate analogue, pteroic acid, in the same manner as ricin. The galactoside-binding ability of ebulin l is demonstrated crystallographically with a complex of the B chain with galactose and with lactose. The negligible cytotoxicity of ebulin l is apparently due to a reduced affinity for galactosides. An altered mode of galactoside binding in the 2gamma subdomain of the lectin B chain primarily causes the reduced affinity.


==About this Structure==
2.8-A crystal structure of a nontoxic type-II ribosome-inactivating protein, ebulin l.,Pascal JM, Day PJ, Monzingo AF, Ernst SR, Robertus JD, Iglesias R, Perez Y, Ferreras JM, Citores L, Girbes T Proteins. 2001 May 15;43(3):319-26. PMID:11288182<ref>PMID:11288182</ref>
1HWP is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Sambucus_ebulus Sambucus ebulus] with PT1 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/rRNA_N-glycosylase rRNA N-glycosylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.22 3.2.2.22] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1HWP OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
2.8-A crystal structure of a nontoxic type-II ribosome-inactivating protein, ebulin l., Pascal JM, Day PJ, Monzingo AF, Ernst SR, Robertus JD, Iglesias R, Perez Y, Ferreras JM, Citores L, Girbes T, Proteins. 2001 May 15;43(3):319-26. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11288182 11288182]
</div>
[[Category: Protein complex]]
<div class="pdbe-citations 1hwp" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sambucus ebulus]]
[[Category: Sambucus ebulus]]
[[Category: rRNA N-glycosylase]]
[[Category: Day PJ]]
[[Category: Day, P.J.]]
[[Category: Ernst SR]]
[[Category: Ernst, S.R.]]
[[Category: Monzingo AF]]
[[Category: Monzingo, A.F.]]
[[Category: Pascal JM]]
[[Category: Pascal, J.M.]]
[[Category: Robertus JD]]
[[Category: Robertus, J.D.]]
[[Category: PT1]]
[[Category: inhibitor]]
[[Category: ribosome-inactivating protein]]
[[Category: ricin-like]]
 
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