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1bs9

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[[Image:1bs9.gif|left|200px]]<br />
 
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<applet load="1bs9" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1bs9, resolution 1.10&Aring;" />
 
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'''ACETYLXYLAN ESTERASE FROM P. PURPUROGENUM REFINED AT 1.10 ANGSTROMS'''<br />
 
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==Overview==
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==ACETYLXYLAN ESTERASE FROM P. PURPUROGENUM REFINED AT 1.10 ANGSTROMS==
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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.
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<StructureSection load='1bs9' size='340' side='right'caption='[[1bs9]], [[Resolution|resolution]] 1.10&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1bs9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Talaromyces_purpureogenus Talaromyces purpureogenus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BS9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BS9 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.1&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1bs9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bs9 OCA], [https://pdbe.org/1bs9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bs9 RCSB], [https://www.ebi.ac.uk/pdbsum/1bs9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bs9 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/AXE2_TALPU AXE2_TALPU] Degrades acetylated xylans by cleaving acetyl side groups from the hetero-xylan backbone.<ref>PMID:8756392</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bs/1bs9_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1bs9 ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1BS9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Penicillium_purpurogenum Penicillium purpurogenum] with SO4 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [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] Structure known Active Site: CAT. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1BS9 OCA].
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*[[Acetylxylan esterase 3D structures|Acetylxylan esterase 3D structures]]
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== References ==
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==Reference==
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<references/>
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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:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10089308 10089308]
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__TOC__
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[[Category: Acetylesterase]]
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</StructureSection>
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[[Category: Penicillium purpurogenum]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Talaromyces purpureogenus]]
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[[Category: Erman, M.]]
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[[Category: Erman M]]
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[[Category: Eyzaguirre, J.]]
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[[Category: Eyzaguirre J]]
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[[Category: Ghosh, D.]]
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[[Category: Ghosh D]]
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[[Category: Jornvall, H.]]
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[[Category: Jornvall H]]
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[[Category: Lala, P.]]
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[[Category: Lala P]]
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[[Category: Li, N.]]
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[[Category: Li N]]
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[[Category: Pangborn, W.]]
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[[Category: Pangborn W]]
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[[Category: Sawicki, M.W.]]
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[[Category: Sawicki MW]]
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[[Category: Thiel, D.J.]]
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[[Category: Thiel DJ]]
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[[Category: Weeks, D.R.]]
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[[Category: Weeks DR]]
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[[Category: SO4]]
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[[Category: alpha/beta hydrolase]]
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[[Category: esterase]]
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[[Category: serine hydrolase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 5 14:09:35 2007''
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Current revision

ACETYLXYLAN ESTERASE FROM P. PURPUROGENUM REFINED AT 1.10 ANGSTROMS

PDB ID 1bs9

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