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[[Image:2axe.png|left|200px]]
==IODINATED COMPLEX OF ACETYL XYLAN ESTERASE AT 1.80 ANGSTROMS==
<StructureSection load='2axe' size='340' side='right' caption='[[2axe]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2axe]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Penicillium_purpurogenum Penicillium purpurogenum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AXE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2AXE FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=TYI:3,5-DIIODOTYROSINE'>TYI</scene></td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Acetylesterase Acetylesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.6 3.1.1.6] </span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2axe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2axe OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2axe RCSB], [http://www.ebi.ac.uk/pdbsum/2axe PDBsum]</span></td></tr>
<table>
== 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/ax/2axe_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Enzymatic and non-enzymatic iodination of the amino acid tyrosine is a well known phenomenon. The iodination technique has been widely used for labeling proteins. Using high-resolution X-ray crystallographic techniques, the chemical and three-dimensional structures of iodotyrosines formed by non-enzymatic incorporation of I atoms into tyrosine residues of a crystalline protein are described. Acetylxylan esterase (AXE II; 207 amino-acid residues) from Penicillium purpurogenum has substrate specificities towards acetate esters of D-xylopyranose residues in xylan and belongs to a new class of alpha/beta hydrolases. The crystals of the enzyme are highly ordered, tightly packed and diffract to better than sub-angstrom resolution at 85 K. The iodination technique has been utilized to prepare an isomorphous derivative of the AXE II crystal. The structure of the enzyme determined at 1.10 A resolution exclusively by normal and anomalous scattering from I atoms, along with the structure of the iodinated complex at 1.80 A resolution, demonstrate the formation of covalent bonds between I atoms and C atoms at ortho positions to the hydroxyl groups of two tyrosyl moieties, yielding iodotyrosines.


{{STRUCTURE_2axe|  PDB=2axe  |  SCENE=  }}
Determination of a protein structure by iodination: the structure of iodinated acetylxylan esterase.,Ghosh D, Erman M, Sawicki M, Lala P, Weeks DR, Li N, Pangborn W, Thiel DJ, Jornvall H, Gutierrez R, Eyzaguirre J Acta Crystallogr D Biol Crystallogr. 1999 Apr;55(Pt 4):779-84. PMID:10089308<ref>PMID:10089308</ref>


===IODINATED COMPLEX OF ACETYL XYLAN ESTERASE AT 1.80 ANGSTROMS===
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
{{ABSTRACT_PUBMED_10089308}}
 
==About this Structure==
[[2axe]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Penicillium_purpurogenum Penicillium purpurogenum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AXE OCA].


==See Also==
==See Also==
*[[Acetylxylan esterase|Acetylxylan esterase]]
*[[Acetylxylan esterase|Acetylxylan esterase]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:010089308</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Acetylesterase]]
[[Category: Acetylesterase]]
[[Category: Penicillium purpurogenum]]
[[Category: Penicillium purpurogenum]]
Retrieved from "https://proteopedia.org/2axe"