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| | <StructureSection load='3ecq' size='340' side='right'caption='[[3ecq]], [[Resolution|resolution]] 2.90Å' scene=''> | | <StructureSection load='3ecq' size='340' side='right'caption='[[3ecq]], [[Resolution|resolution]] 2.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3ecq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Strr6 Strr6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ECQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ECQ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3ecq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pneumoniae_R6 Streptococcus pneumoniae R6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ECQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ECQ FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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]] 2.9Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">spr0328 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=171101 STRR6])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Endo-alpha-N-acetylgalactosaminidase Endo-alpha-N-acetylgalactosaminidase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.97 3.2.1.97] </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=3ecq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ecq OCA], [https://pdbe.org/3ecq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ecq RCSB], [https://www.ebi.ac.uk/pdbsum/3ecq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ecq 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=3ecq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ecq OCA], [https://pdbe.org/3ecq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ecq RCSB], [https://www.ebi.ac.uk/pdbsum/3ecq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ecq ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/GH101_STRR6 GH101_STRR6]] Is involved in the breakdown of mucin-type O-linked glycans. Specifically removes the T-antigen disaccharide (Gal-beta-1,3-GalNAc-alpha) from extracellular host glycoproteins. Is representative of a broadly important class of virulence factors.<ref>PMID:18784084</ref> <ref>PMID:19788271</ref> <ref>PMID:21877</ref>
| + | [https://www.uniprot.org/uniprot/GH101_STRR6 GH101_STRR6] Is involved in the breakdown of mucin-type O-linked glycans. Specifically removes the T-antigen disaccharide (Gal-beta-1,3-GalNAc-alpha) from extracellular host glycoproteins. Is representative of a broadly important class of virulence factors.<ref>PMID:18784084</ref> <ref>PMID:19788271</ref> <ref>PMID:21877</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | <jmolCheckbox> | | <jmolCheckbox> |
| | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ec/3ecq_consurf.spt"</scriptWhenChecked> | | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ec/3ecq_consurf.spt"</scriptWhenChecked> |
| - | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> |
| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
| | </jmolCheckbox> | | </jmolCheckbox> |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Endo-alpha-N-acetylgalactosaminidase]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Strr6]] | + | [[Category: Streptococcus pneumoniae R6]] |
| - | [[Category: Caines, M E.C]] | + | [[Category: Caines MEC]] |
| - | [[Category: Strynadka, N C.J]] | + | [[Category: Strynadka NCJ]] |
| - | [[Category: Vuckovic, M]] | + | [[Category: Vuckovic M]] |
| - | [[Category: Zhu, H]] | + | [[Category: Zhu H]] |
| - | [[Category: Cell wall]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Peptidoglycan-anchor]]
| + | |
| - | [[Category: Secreted]]
| + | |
| Structural highlights
Function
GH101_STRR6 Is involved in the breakdown of mucin-type O-linked glycans. Specifically removes the T-antigen disaccharide (Gal-beta-1,3-GalNAc-alpha) from extracellular host glycoproteins. Is representative of a broadly important class of virulence factors.[1] [2] [3]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Streptococcus pneumoniae endo-alpha-N-acetylgalactosaminidase is a cell surface-anchored glycoside hydrolase from family GH101 involved in the breakdown of mucin type O-linked glycans. The 189-kDa mature enzyme specifically hydrolyzes the T-antigen disaccharide from extracellular host glycoproteins and is representative of a broadly important class of virulence factors that have remained structurally uncharacterized due to their large size and highly modular nature. Here we report a 2.9 angstroms resolution crystal structure that remarkably captures the multidomain architecture and characterizes a catalytic center unexpectedly resembling that of alpha-amylases. Our analysis presents a complete model of glycoprotein recognition and provides a basis for the structure-based design of novel Streptococcus vaccines and therapeutics.
The structural basis for T-antigen hydrolysis by Streptococcus pneumoniae: a target for structure-based vaccine design.,Caines ME, Zhu H, Vuckovic M, Willis LM, Withers SG, Wakarchuk WW, Strynadka NC J Biol Chem. 2008 Nov 14;283(46):31279-83. Epub 2008 Sep 10. PMID:18784084[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Caines ME, Zhu H, Vuckovic M, Willis LM, Withers SG, Wakarchuk WW, Strynadka NC. The structural basis for T-antigen hydrolysis by Streptococcus pneumoniae: a target for structure-based vaccine design. J Biol Chem. 2008 Nov 14;283(46):31279-83. Epub 2008 Sep 10. PMID:18784084 doi:http://dx.doi.org/10.1074/jbc.C800150200
- ↑ Willis LM, Zhang R, Reid A, Withers SG, Wakarchuk WW. Mechanistic investigation of the endo-alpha-N-acetylgalactosaminidase from Streptococcus pneumoniae R6. Biochemistry. 2009 Nov 3;48(43):10334-41. doi: 10.1021/bi9013825. PMID:19788271 doi:http://dx.doi.org/10.1021/bi9013825
- ↑ Umemoto J, Bhavanandan VP, Davidson EA. Purification and properties of an endo-alpha-N-acetyl-D-galactosaminidase from Diplococcus pneumoniae. J Biol Chem. 1977 Dec 10;252(23):8609-14. PMID:21877
- ↑ Caines ME, Zhu H, Vuckovic M, Willis LM, Withers SG, Wakarchuk WW, Strynadka NC. The structural basis for T-antigen hydrolysis by Streptococcus pneumoniae: a target for structure-based vaccine design. J Biol Chem. 2008 Nov 14;283(46):31279-83. Epub 2008 Sep 10. PMID:18784084 doi:http://dx.doi.org/10.1074/jbc.C800150200
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