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| | ==The polyserine tract of Nasonia vitripennis Vg residues 351-385== | | ==The polyserine tract of Nasonia vitripennis Vg residues 351-385== |
| - | <StructureSection load='2lid' size='340' side='right'caption='[[2lid]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='2lid' size='340' side='right'caption='[[2lid]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2lid]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LID OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2LID FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2lid]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Nasonia_vitripennis Nasonia vitripennis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LID OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LID FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2lic|2lic]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2lid FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lid OCA], [http://pdbe.org/2lid PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2lid RCSB], [http://www.ebi.ac.uk/pdbsum/2lid PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2lid ProSAT]</span></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=2lid FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lid OCA], [https://pdbe.org/2lid PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2lid RCSB], [https://www.ebi.ac.uk/pdbsum/2lid PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2lid ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Halskau, O]] | + | [[Category: Nasonia vitripennis]] |
| - | [[Category: Havukainen, H]] | + | [[Category: Halskau Jr O]] |
| - | [[Category: Lipid transport]] | + | [[Category: Havukainen H]] |
| Structural highlights
Publication Abstract from PubMed
Vitellogenin (Vg) is an egg-yolk precursor protein in most oviparous species. In honeybee (Apis mellifera), the protein (AmVg) also affects social behavior and life-span plasticity. Despite its manifold functions, the AmVg molecule remains poorly understood. The subject of our structure-oriented AmVg study is its polyserine tract - a little-investigated repetitive protein segment mostly found in insects. We previously reported that AmVg is tissue specifically cleaved in the vicinity of this tract. Here, we show that, despite its potential for an open, disordered structure, AmVg is unexpectedly resistant to trypsin/chymotrypsin digestion at the tract. Our findings suggest that multiple phosphorylation plays a role in this resilience. Sequence variation is highly pronounced at the polyserine region in insect Vgs. We demonstrate that sequence differences in this region can lead to structural variation, as NMR and circular dichroism (CD) evidence assign different conformational propensities to polyserine peptides from the honeybee and the jewel wasp Nasonia vitripennis; the former is extended and disordered and the latter more compact and helical. CD analysis of the polyserine region of bumblebee Bombus ignitus and wasp Pimpla nipponica supports a random coil structure in these species. The spectroscopic results strengthen our model of the AmVg polyserine tract as a flexible domain linker shielded by phosphorylation.
A vitellogenin polyserine cleavage site: highly disordered conformation protected from proteolysis by phosphorylation.,Havukainen H, Underhaug J, Wolschin F, Amdam G, Halskau O J Exp Biol. 2012 Jun 1;215(Pt 11):1837-46. PMID:22573762[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Havukainen H, Underhaug J, Wolschin F, Amdam G, Halskau O. A vitellogenin polyserine cleavage site: highly disordered conformation protected from proteolysis by phosphorylation. J Exp Biol. 2012 Jun 1;215(Pt 11):1837-46. PMID:22573762 doi:10.1242/jeb.065623
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