6ojb
From Proteopedia
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<StructureSection load='6ojb' size='340' side='right'caption='[[6ojb]], [[Resolution|resolution]] 2.09Å' scene=''> | <StructureSection load='6ojb' size='340' side='right'caption='[[6ojb]], [[Resolution|resolution]] 2.09Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[6ojb]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6OJB FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6ojb]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Aspfu Aspfu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6OJB FirstGlance]. <br> |
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=X6X:2-AMINO-2-DEOXY-ALPHA-D-GALACTOPYRANOSE'>X6X</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=X6X:2-AMINO-2-DEOXY-ALPHA-D-GALACTOPYRANOSE'>X6X</scene></td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">AFUA_3G07890 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=330879 ASPFU])</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=6ojb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ojb OCA], [http://pdbe.org/6ojb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ojb RCSB], [http://www.ebi.ac.uk/pdbsum/6ojb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ojb 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=6ojb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ojb OCA], [http://pdbe.org/6ojb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ojb RCSB], [http://www.ebi.ac.uk/pdbsum/6ojb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ojb ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Aspergillus fumigatus is an opportunistic fungal pathogen that causes both chronic and acute invasive infections. Galactosaminogalactan (GAG) is an integral component of the A. fumigatus biofilm matrix and a key virulence factor. GAG is a heterogeneous linear alpha-1,4-linked exopolysaccharide of galactose and GalNAc that is partially deacetylated after secretion. A cluster of five co-expressed genes has been linked to GAG biosynthesis and modification. One gene in this cluster, ega3, is annotated as encoding a putative alpha-1,4-galactosaminidase belonging to glycoside hydrolase family 114 (GH114). Herein, we show that recombinant Ega3 is an active glycoside hydrolase that disrupts GAG-dependent A. fumigatus and Pel polysaccharide-dependent Pseudomonas aeruginosa biofilms at nanomolar concentrations. Using MS and functional assays, we demonstrate that Ega3 is an endo-acting alpha-1,4-galactosaminidase whose activity depends on the conserved acidic residues, Asp-189 and Glu-247. X-ray crystallographic structural analysis of the apo Ega3 and an Ega3-galactosamine complex, at 1.76 and 2.09 A resolutions, revealed a modified (beta/alpha)8-fold with a deep electronegative cleft, which upon ligand binding is capped to form a tunnel. Our structural analysis coupled with in silico docking studies also uncovered the molecular determinants for galactosamine specificity and substrate binding at the -2 to +1 binding subsites. The findings in this study increase the structural and mechanistic understanding of the GH114 family, which has >600 members encoded by plant and opportunistic human pathogens, as well as in industrially used bacteria and fungi. | ||
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| + | Ega3 from the fungal pathogen Aspergillus fumigatus is an endo-alpha-1,4-galactosaminidase that disrupts microbial biofilms.,Bamford NC, Le Mauff F, Subramanian AS, Yip P, Millan C, Zhang Y, Zacharias C, Forman A, Nitz M, Codee JDC, Uson I, Sheppard DC, Howell PL J Biol Chem. 2019 Sep 13;294(37):13833-13849. doi: 10.1074/jbc.RA119.009910. Epub, 2019 Aug 15. PMID:31416836<ref>PMID:31416836</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6ojb" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| + | [[Category: Aspfu]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Bamford, N C]] | [[Category: Bamford, N C]] | ||
Revision as of 09:29, 8 January 2020
Crystal Structure of Aspergillus fumigatus Ega3 complex with galactosamine
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