View source for 2bjh


==Crystal Structure Of S133A AnFaeA-ferulic acid complex==
<StructureSection load='2bjh' size='340' side='right'caption='[[2bjh]], [[Resolution|resolution]] 2.54&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2bjh]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_niger Aspergillus niger]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BJH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BJH 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]] 2.54&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FER:3-(4-HYDROXY-3-METHOXYPHENYL)-2-PROPENOIC+ACID'>FER</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</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=2bjh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bjh OCA], [https://pdbe.org/2bjh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bjh RCSB], [https://www.ebi.ac.uk/pdbsum/2bjh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bjh ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FAEA_ASPNG FAEA_ASPNG] Involved in degradation of plant cell walls. Hydrolyzes the feruloyl-arabinose ester bond in arabinoxylans, and the feruloyl-galactose ester bond in pectin. Binds to cellulose.<ref>PMID:9406381</ref> <ref>PMID:11931668</ref> <ref>PMID:7805053</ref> <ref>PMID:9649839</ref> <ref>PMID:11931668</ref> <ref>PMID:15081808</ref> <ref>PMID:17027758</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/bj/2bjh_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=2bjh ConSurf].
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== Publication Abstract from PubMed ==
Feruloyl esterases hydrolyse phenolic groups involved in the cross-linking of arabinoxylan to other polymeric structures. This is important for opening the cell wall structure making material more accessible to glycoside hydrolases. Here we describe the crystal structure of inactive S133A mutant of type-A feruloyl esterase from Aspergillus niger (AnFaeA) in complex with a feruloylated trisaccharide substrate. Only the ferulic acid moiety of the substrate is visible in the electron density map, showing interactions through its OH and OCH(3) groups with the hydroxyl groups of Tyr80. The importance of aromatic and polar residues in the activity of AnFaeA was also evaluated using site-directed mutagenesis. Four mutant proteins were heterologously expressed in Pichia pastoris, and their kinetic properties determined against methyl esters of ferulic, sinapic, caffeic and p-coumaric acid. The k(cat) of Y80S, Y80V, W260S and W260V was drastically reduced compared to that of the wild-type enzyme. However, the replacement of Tyr80 and Trp260 with smaller residues broadened the substrate specificity of the enzyme, allowing the hydrolysis of methyl caffeate. The role of Tyr80 and Trp260 in AnFaeA are discussed in light of the three-dimensional structure.

Probing the determinants of substrate specificity of a feruloyl esterase, AnFaeA, from Aspergillus niger.,Faulds CB, Molina R, Gonzalez R, Husband F, Juge N, Sanz-Aparicio J, Hermoso JA FEBS J. 2005 Sep;272(17):4362-71. PMID:16128806<ref>PMID:16128806</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2bjh" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Aspergillus niger]]
[[Category: Large Structures]]
[[Category: Faulds CB]]
[[Category: Gonzalez R]]
[[Category: Hermoso JA]]
[[Category: Husband F]]
[[Category: Juge N]]
[[Category: Molina R]]
[[Category: Sanz-Aparicio J]]