7ctr: Difference between revisions
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==Closed form of PET-degrading cutinase Cut190 with thermostability-improving mutations of S226P/R228S/Q138A/D250C-E296C/Q123H/N202H== | ==Closed form of PET-degrading cutinase Cut190 with thermostability-improving mutations of S226P/R228S/Q138A/D250C-E296C/Q123H/N202H== | ||
<StructureSection load='7ctr' size='340' side='right'caption='[[7ctr]]' scene=''> | <StructureSection load='7ctr' size='340' side='right'caption='[[7ctr]], [[Resolution|resolution]] 1.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7CTR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7CTR FirstGlance]. <br> | <table><tr><td colspan='2'>[[7ctr]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomonospora_viridis Saccharomonospora viridis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7CTR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7CTR FirstGlance]. <br> | ||
</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=7ctr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ctr OCA], [https://pdbe.org/7ctr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ctr RCSB], [https://www.ebi.ac.uk/pdbsum/7ctr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ctr ProSAT]</span></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.2Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DIO:1,4-DIETHYLENE+DIOXIDE'>DIO</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=7ctr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ctr OCA], [https://pdbe.org/7ctr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ctr RCSB], [https://www.ebi.ac.uk/pdbsum/7ctr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ctr ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/W0TJ64_9PSEU W0TJ64_9PSEU] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The cutinase-like enzyme from the thermophile Saccharomonospora viridis AHK190, Cut190, is a good candidate to depolymerize polyethylene terephthalate (PET) efficiently. We previously developed a mutant of Cut190 (S226P/R228S), which we designated as Cut190* that has both increased activity and stability and solved its crystal structure. Recently, we showed that mutation of D250C/E296C on one of the Ca(2+) -binding sites resulted in a higher thermal stability while retaining its polyesterase activity. In this study, we solved the crystal structures of Cut190* mutants, Q138A/D250C-E296C/Q123H/N202H, designated as Cut190*SS, and its inactive S176A mutant, Cut190*SS_S176A, at high resolution. The overall structures were similar to those of Cut190* and Cut190*S176A reported previously. As expected, Cys250 and Cys296 were closely located to form a disulfide bond, which would assuredly contribute to increase the stability. Isothermal titration calorimetry experiments and 3D Reference Interaction Site Model calculations showed that the metal-binding properties of the Cut190*SS series were different from those of the Cut190* series. However, our results show that binding of Ca(2+) to the weak binding site, site 1, would be retained, enabling Cut190*SS to keep its ability to use Ca(2+) to accelerate the conformational change from the closed (inactive) to the open (active) form. While increasing the thermal stability, Cut190*SS could still express its enzymatic function. Even after incubation at 70 degrees C, which corresponds to the glass transition temperature of PET, the enzyme retained its activity well, implying a high applicability for industrial PET depolymerization using Cut190*SS. | |||
Structural basis of mutants of PET-degrading enzyme from Saccharomonospora viridis AHK190 with high activity and thermal stability.,Emori M, Numoto N, Senga A, Bekker GJ, Kamiya N, Kobayashi Y, Ito N, Kawai F, Oda M Proteins. 2020 Dec 19. doi: 10.1002/prot.26034. PMID:33340163<ref>PMID:33340163</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7ctr" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Cutinase 3D structures|Cutinase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Saccharomonospora viridis]] | |||
[[Category: Bekker GJ]] | [[Category: Bekker GJ]] | ||
[[Category: Emori M]] | [[Category: Emori M]] | ||
Latest revision as of 19:16, 29 November 2023
Closed form of PET-degrading cutinase Cut190 with thermostability-improving mutations of S226P/R228S/Q138A/D250C-E296C/Q123H/N202HClosed form of PET-degrading cutinase Cut190 with thermostability-improving mutations of S226P/R228S/Q138A/D250C-E296C/Q123H/N202H
Structural highlights
FunctionPublication Abstract from PubMedThe cutinase-like enzyme from the thermophile Saccharomonospora viridis AHK190, Cut190, is a good candidate to depolymerize polyethylene terephthalate (PET) efficiently. We previously developed a mutant of Cut190 (S226P/R228S), which we designated as Cut190* that has both increased activity and stability and solved its crystal structure. Recently, we showed that mutation of D250C/E296C on one of the Ca(2+) -binding sites resulted in a higher thermal stability while retaining its polyesterase activity. In this study, we solved the crystal structures of Cut190* mutants, Q138A/D250C-E296C/Q123H/N202H, designated as Cut190*SS, and its inactive S176A mutant, Cut190*SS_S176A, at high resolution. The overall structures were similar to those of Cut190* and Cut190*S176A reported previously. As expected, Cys250 and Cys296 were closely located to form a disulfide bond, which would assuredly contribute to increase the stability. Isothermal titration calorimetry experiments and 3D Reference Interaction Site Model calculations showed that the metal-binding properties of the Cut190*SS series were different from those of the Cut190* series. However, our results show that binding of Ca(2+) to the weak binding site, site 1, would be retained, enabling Cut190*SS to keep its ability to use Ca(2+) to accelerate the conformational change from the closed (inactive) to the open (active) form. While increasing the thermal stability, Cut190*SS could still express its enzymatic function. Even after incubation at 70 degrees C, which corresponds to the glass transition temperature of PET, the enzyme retained its activity well, implying a high applicability for industrial PET depolymerization using Cut190*SS. Structural basis of mutants of PET-degrading enzyme from Saccharomonospora viridis AHK190 with high activity and thermal stability.,Emori M, Numoto N, Senga A, Bekker GJ, Kamiya N, Kobayashi Y, Ito N, Kawai F, Oda M Proteins. 2020 Dec 19. doi: 10.1002/prot.26034. PMID:33340163[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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