1pum

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{{Seed}}
 
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[[Image:1pum.png|left|200px]]
 
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==Mistletoe lectin I in complex with galactose==
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The line below this paragraph, containing "STRUCTURE_1pum", creates the "Structure Box" on the page.
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<StructureSection load='1pum' size='340' side='right'caption='[[1pum]], [[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'>[[1pum]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Viscum_album Viscum album]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PUM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PUM 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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FUL:BETA-L-FUCOSE'>FUL</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1pum| PDB=1pum | 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=1pum FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pum OCA], [https://pdbe.org/1pum PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pum RCSB], [https://www.ebi.ac.uk/pdbsum/1pum PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pum ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ML1_VISAL ML1_VISAL] The A chain is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits by removing adenine from position 4,324 of 28S rRNA. The B chain binds to cell receptors and probably facilitates the entry into the cell of the A chain; B chains are also responsible for cell agglutination (lectin activity). Inhibits growth of the human tumor cell line Molt4.<ref>PMID:15182350</ref> <ref>PMID:15001393</ref> <ref>PMID:1450445</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/pu/1pum_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=1pum 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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The structures of mistletoe lectin I (ML-I) from Viscum album complexed with lactose and galactose have been determined at 2.3 A resolution and refined to R factors of 20.9% (Rfree = 23.6%) and 20.9 (Rfree = 24.6%), respectively. ML-I is a heterodimer and belongs to the class of ribosome-inactivating proteins of type II, which consist of two chains. The A-chain has rRNA N-glycosidase activity and irreversibly inhibits eukaryotic ribosomes. The B-chain is a lectin and preferentially binds to galactose-terminated glycolipids and glycoproteins on cell membranes. Saccharide binding is performed by two binding sites in subdomains alpha1 and gamma2 of the ML-I B-chain separated by approximately 62 A from each other. The favoured binding of galactose in subdomain alpha1 is achieved via hydrogen bonds connecting the 4-hydroxyl and 3-hydroxyl groups of the sugar moiety with the side chains of Asp23B, Gln36B and Lys41B and the main chain of 26B. The aromatic ring of Trp38B on top of the preferred binding pocket supports van der Waals packing of the apolar face of galactose and stabilizes the sugar-lectin complex. In the galactose-binding site II of subdomain gamma2, Tyr249B provides the hydrophobic stacking and the side chains of Asp235B, Gln238B and Asn256B are hydrogen-bonding partners for galactose. In the case of the galactose-binding site I, the 2-hydroxyl group also stabilizes the sugar-protein complex, an interaction thus far rarely detected in galactose-specific lectins. Finally, a potential third low-affinity galactose-binding site in subunit beta1 was identified in the present ML-I structures, in which a glycerol molecule from the cryoprotectant buffer has bound, mimicking the sugar compound.
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===Mistletoe lectin I in complex with galactose===
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Mistletoe lectin I in complex with galactose and lactose reveals distinct sugar-binding properties.,Mikeska R, Wacker R, Arni R, Singh TP, Mikhailov A, Gabdoulkhakov A, Voelter W, Betzel C Acta Crystallogr Sect F Struct Biol Cryst Commun. 2005 Jan 1;61(Pt, 1):17-25. Epub 2004 Dec 24. PMID:16508080<ref>PMID:16508080</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_16508080}}, adds the Publication Abstract to the page
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<div class="pdbe-citations 1pum" style="background-color:#fffaf0;"></div>
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(as it appears on PubMed at http://www.pubmed.gov), where 16508080 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_16508080}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Large Structures]]
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1PUM is a 2 chains structure of sequences from [http://en.wikipedia.org/wiki/Viscum_album Viscum album]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PUM OCA].
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==Reference==
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<ref group="xtra">PMID:16508080</ref><references group="xtra"/>
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[[Category: Viscum album]]
[[Category: Viscum album]]
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[[Category: Betzel, C.]]
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[[Category: Betzel C]]
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[[Category: Konareva, N.]]
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[[Category: Konareva N]]
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[[Category: Krauspenhaar, R.]]
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[[Category: Krauspenhaar R]]
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[[Category: Mikhailov, A.]]
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[[Category: Mikhailov A]]
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[[Category: Stoeva, S.]]
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[[Category: Stoeva S]]
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[[Category: Voelter, W.]]
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[[Category: Voelter W]]
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[[Category: Protein-sugar complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Feb 17 17:23:48 2009''
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Current revision

Mistletoe lectin I in complex with galactose

PDB ID 1pum

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