View source for 8ynw


==S102A mutant of poly(3-hydroxybutyrate) depolymerase PhaZ from Bacillus thuringiensis==
<StructureSection load='8ynw' size='340' side='right'caption='[[8ynw]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8ynw]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_thuringiensis Bacillus thuringiensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8YNW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8YNW 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]] 1.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=P33:3,6,9,12,15,18-HEXAOXAICOSANE-1,20-DIOL'>P33</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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=8ynw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ynw OCA], [https://pdbe.org/8ynw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ynw RCSB], [https://www.ebi.ac.uk/pdbsum/8ynw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ynw ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Poly((R)-3-hydroxybutyrate) (PHB) is a microbial biopolymer widely used in commercial biodegradable plastics. PHB degradation in cell is catalyzed by PHB depolymerase (PhaZ), which hydrolyzes the polyester into mono- and/or oligomeric (R)-3-hydroxylbutyrates (3HB). A novel intracellular PhaZ from Bacillus thuringiensis (BtPhaZ) was identified for potential applications in polymer biodegradation and 3HB production. Herein, we present the crystal structure of BtPhaZ at 1.42-A resolution, making the first crystal structure for an intracellular PhaZ. BtPhaZ comprises a canonical alpha/beta hydrolase catalytic domain and a unique alpha-helical cap domain. Despite lacking sequence similarity, BtPhaZ shares high structural homology with many alpha/beta hydrolase members, exhibiting a similar active-site architecture. Alongside the most conserved superfamily signature, several new conserved signatures have been identified, contributing not only to the formations of the Ser-His-Asp catalytic triad and the oxyanion hole but also to the active-site conformation. The putative P-1 subsite appears to have limited space for accommodating only one 3HB-monomer, which may provide an explanation why the major hydrolytic product for BtPhaZ is monomeric form. Furthermore, a cluster of solvent-exposed hydrophobic residues in the helical cap domain forms an adsorption site for polymer-binding. Detailed structural comparisons reveal that various PhaZs employ distinct residues for the biopolymer-binding and hydrolysis.

Structural insight into the poly(3-hydroxybutyrate) hydrolysis by intracellular PHB depolymerase from Bacillus thuringiensis.,Wang YL, Ye LC, Chang SC, Chen SC, Hsu CH Int J Biol Macromol. 2024 Nov 24;284(Pt 1):137999. doi: , 10.1016/j.ijbiomac.2024.137999. PMID:39592048<ref>PMID:39592048</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8ynw" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Bacillus thuringiensis]]
[[Category: Large Structures]]
[[Category: Chen SC]]
[[Category: Hsu CH]]
[[Category: Wang YL]]
[[Category: Ye LC]]