View source for 7uqn


==Pathogenesis related 10-10 noscapine complex==
<StructureSection load='7uqn' size='340' side='right'caption='[[7uqn]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7uqn]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Papaver_somniferum Papaver somniferum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7UQN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7UQN 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]] 1.7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=08N:noscapine'>08N</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=7uqn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7uqn OCA], [https://pdbe.org/7uqn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7uqn RCSB], [https://www.ebi.ac.uk/pdbsum/7uqn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7uqn ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Opium poppy accumulates copious amounts of several benzylisoquinoline alkaloids including morphine, noscapine, and papaverine, in the specialized cytoplasm of laticifers, which compose an internal secretory system associated with phloem throughout the plant. The contiguous latex includes an abundance of related proteins belonging to the pathogenesis-related (PR)10 family known collectively as major latex proteins (MLPs) and representing at least 35% of the total cellular protein content. Two latex MLP/PR10 proteins, thebaine synthase and neopione isomerase, have recently been shown to catalyze late steps in morphine biosynthesis previously assigned as spontaneous reactions. Using a combination of sucrose density-gradient fractionation-coupled proteomics, differential scanning fluorimetry, isothermal titration calorimetry, and X-ray crystallography, we show that the major latex proteins are a family of alkaloid-binding proteins that display altered conformation in the presence of certain ligands. Addition of MLP/PR10 proteins to yeast strains engineered with morphine biosynthetic genes from the plant significantly enhanced the conversion of salutaridine to morphinan alkaloids.

Alkaloid binding to opium poppy major latex proteins triggers structural modification and functional aggregation.,Ozber N, Carr SC, Morris JS, Liang S, Watkins JL, Caldo KM, Hagel JM, Ng KKS, Facchini PJ Nat Commun. 2022 Nov 9;13(1):6768. doi: 10.1038/s41467-022-34313-6. PMID:36351903<ref>PMID:36351903</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7uqn" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Papaver somniferum]]
[[Category: Carr SC]]
[[Category: Ng KKS]]