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| | ==Crystal structure of mouse Xyloside xylosyltransferase 1 complexed with manganese== | | ==Crystal structure of mouse Xyloside xylosyltransferase 1 complexed with manganese== |
| - | <StructureSection load='4wlm' size='340' side='right' caption='[[4wlm]], [[Resolution|resolution]] 3.00Å' scene=''> | + | <StructureSection load='4wlm' size='340' side='right'caption='[[4wlm]], [[Resolution|resolution]] 3.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4wlm]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WLM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4WLM FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4wlm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WLM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4WLM FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 3Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4wlg|4wlg]], [[4wlz|4wlz]], [[4wm0|4wm0]], [[4wma|4wma]], [[4wmm|4wmm]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Xxylt1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=4wlm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wlm OCA], [https://pdbe.org/4wlm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4wlm RCSB], [https://www.ebi.ac.uk/pdbsum/4wlm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4wlm ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4wlm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wlm OCA], [http://pdbe.org/4wlm PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4wlm RCSB], [http://www.ebi.ac.uk/pdbsum/4wlm PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4wlm ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/XXLT1_MOUSE XXLT1_MOUSE]] Alpha-1,3-xylosyltransferase, which elongates the O-linked xylose-glucose disaccharide attached to EGF-like repeats in the extracellular domain of Notch proteins by catalyzing the addition of the second xylose. | + | [https://www.uniprot.org/uniprot/XXLT1_MOUSE XXLT1_MOUSE] Alpha-1,3-xylosyltransferase, which elongates the O-linked xylose-glucose disaccharide attached to EGF-like repeats in the extracellular domain of Notch proteins by catalyzing the addition of the second xylose. |
| | <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: Lk3 transgenic mice]] | + | [[Category: Large Structures]] |
| - | [[Category: Li, H]] | + | [[Category: Mus musculus]] |
| - | [[Category: Yu, H]] | + | [[Category: Li H]] |
| - | [[Category: Glycosyltransferase]] | + | [[Category: Yu H]] |
| - | [[Category: Manganese binding]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
XXLT1_MOUSE Alpha-1,3-xylosyltransferase, which elongates the O-linked xylose-glucose disaccharide attached to EGF-like repeats in the extracellular domain of Notch proteins by catalyzing the addition of the second xylose.
Publication Abstract from PubMed
A major question remaining in glycobiology is how a glycosyltransferase (GT) that retains the anomeric linkage of a sugar catalyzes the reaction. Xyloside alpha-1,3-xylosyltransferase (XXYLT1) is a retaining GT that regulates Notch receptor activation by adding xylose to the Notch extracellular domain. Here, using natural acceptor and donor substrates and active Mus musculus XXYLT1, we report a series of crystallographic snapshots along the reaction, including an unprecedented natural and competent Michaelis reaction complex for retaining enzymes. These structures strongly support the SNi-like reaction as the retaining mechanism for XXYLT1. Unexpectedly, the epidermal growth factor-like repeat acceptor substrate undergoes a large conformational change upon binding to the active site, providing a structural basis for substrate specificity. Our improved understanding of this retaining enzyme will accelerate the design of retaining GT inhibitors that can modulate Notch activity in pathological situations in which Notch dysregulation is known to cause cancer or developmental disorders.
Notch-modifying xylosyltransferase structures support an SNi-like retaining mechanism.,Yu H, Takeuchi M, LeBarron J, Kantharia J, London E, Bakker H, Haltiwanger RS, Li H, Takeuchi H Nat Chem Biol. 2015 Nov;11(11):847-54. doi: 10.1038/nchembio.1927. Epub 2015 Sep , 28. PMID:26414444[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Yu H, Takeuchi M, LeBarron J, Kantharia J, London E, Bakker H, Haltiwanger RS, Li H, Takeuchi H. Notch-modifying xylosyltransferase structures support an SNi-like retaining mechanism. Nat Chem Biol. 2015 Nov;11(11):847-54. doi: 10.1038/nchembio.1927. Epub 2015 Sep , 28. PMID:26414444 doi:http://dx.doi.org/10.1038/nchembio.1927
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