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| | <StructureSection load='3al7' size='340' side='right'caption='[[3al7]], [[Resolution|resolution]] 1.10Å' scene=''> | | <StructureSection load='3al7' size='340' side='right'caption='[[3al7]], [[Resolution|resolution]] 1.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3al7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Katemfe Katemfe]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AL7 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=3AL7 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3al7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thaumatococcus_daniellii Thaumatococcus daniellii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AL7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AL7 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=TLA:L(+)-TARTARIC+ACID'>TLA</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.1Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ald|3ald]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=TLA:L(+)-TARTARIC+ACID'>TLA</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=3al7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3al7 OCA], [http://pdbe.org/3al7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3al7 RCSB], [http://www.ebi.ac.uk/pdbsum/3al7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3al7 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=3al7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3al7 OCA], [https://pdbe.org/3al7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3al7 RCSB], [https://www.ebi.ac.uk/pdbsum/3al7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3al7 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/THM1_THADA THM1_THADA] Taste-modifying protein; intensely sweet-tasting. It is 100000 times sweeter than sucrose on a molar basis. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Katemfe]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Kitabatake, N]] | + | [[Category: Thaumatococcus daniellii]] |
| - | [[Category: Masuda, T]] | + | [[Category: Kitabatake N]] |
| - | [[Category: Mikami, B]] | + | [[Category: Masuda T]] |
| - | [[Category: Plant protein]] | + | [[Category: Mikami B]] |
| - | [[Category: Sweet-tasting protein]]
| + | |
| - | [[Category: Thaumatin]]
| + | |
| Structural highlights
Function
THM1_THADA Taste-modifying protein; intensely sweet-tasting. It is 100000 times sweeter than sucrose on a molar basis.
Publication Abstract from PubMed
Thaumatin, an intensely sweet-tasting plant protein, elicits a sweet taste at a concentration of 50 nM. The crystal structure of a recombinant form of thaumatin I produced in the yeast Pichia pastoris has been determined to a resolution of 1.1 A. The model was refined with anisotropic B parameters and riding H atoms. A comparison of the diffraction data and refinement statistics for recombinant thaumatin I with those for plant thaumatin I revealed no significant differences in the diffraction data. The R values for recombinant thaumatin I and plant thaumatin I (F(o) > 4sigma) were 9.11% and 9.91%, respectively, indicating the final model to be of good quality. Notably, the electron-density maps around Asn46 and Ser63, which differ between thaumatin variants, were significantly improved. Furthermore, a number of H atoms became visible in an OMIT map and could be assigned. The high-quality structure of recombinant thaumatin with H atoms should provide details about sweetness determinants in thaumatin and provide valuable insights into the mechanism of its interaction with taste receptors.
High-resolution structure of the recombinant sweet-tasting protein thaumatin I.,Masuda T, Ohta K, Mikami B, Kitabatake N Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Jun 1;67(Pt, 6):652-8. Epub 2011 May 24. PMID:21636903[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Masuda T, Ohta K, Mikami B, Kitabatake N. High-resolution structure of the recombinant sweet-tasting protein thaumatin I. Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Jun 1;67(Pt, 6):652-8. Epub 2011 May 24. PMID:21636903 doi:10.1107/S174430911101373X
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