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[[Image:3ecq.png|left|200px]]


{{STRUCTURE_3ecq| PDB=3ecq | SCENE= }}
==Endo-alpha-N-acetylgalactosaminidase from Streptococcus pneumoniae: SeMet structure==
<StructureSection load='3ecq' size='340' side='right'caption='[[3ecq]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<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='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</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='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>
== 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>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <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/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3ecq ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== 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.


===Endo-alpha-N-acetylgalactosaminidase from Streptococcus pneumoniae: SeMet structure===
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<ref>PMID:18784084</ref>


{{ABSTRACT_PUBMED_18784084}}
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
==About this Structure==
<div class="pdbe-citations 3ecq" style="background-color:#fffaf0;"></div>
[[3ecq]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ECQ OCA].
== References ==
 
<references/>
==Reference==
__TOC__
<ref group="xtra">PMID:018784084</ref><references group="xtra"/>
</StructureSection>
[[Category: Glycopeptide alpha-N-acetylgalactosaminidase]]
[[Category: Large Structures]]
[[Category: Streptococcus pneumoniae]]
[[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]]
Retrieved from "https://proteopedia.org/3ecq"