5a2g: Difference between revisions
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==An esterase from anaerobic Clostridium hathewayi can hydrolyze aliphatic aromatic polyesters== | |||
<StructureSection load='5a2g' size='340' side='right' caption='[[5a2g]], [[Resolution|resolution]] 1.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5a2g]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5A2G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5A2G FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5a2g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5a2g OCA], [http://pdbe.org/5a2g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5a2g RCSB], [http://www.ebi.ac.uk/pdbsum/5a2g PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The enzymatic hydrolysis of the biodegradable polyester ecoflex and of a variety of oligomeric and polymeric ecoflex model substrates was investigated. For this purpose, substrate specificities of two enzymes of typical compost inhabitants, namely a fungal cutinase from Humicola insolens (HiC) and a bacterial cutinase from Thermobifida cellulosilytica (Thc_Cut1) were compared. Model substrates were systematically designed with variations of the chain length of the alcohol and the acid as well as with varying content of the aromatic constituent terephthalic acid (Ta). HPLC/MS identification and quantification of the hydrolysis products terephthalic acid (Ta), benzoic acid (Ba), adipic acid (Ada), mono(4-hydroxybutyl) terephthalate (BTa), mono-(2-hydroxyethyl) terephthalate (ETa), mono-(6-hydroxyhexyl) terephthalate (HTa) and bis(4-hydroxybutyl) terephthalate (BTaB) indicated that these enzymes indeed hydrolyze the tested esters. Shorter terminal chain length acids but longer chain length alcohols in oligomeric model substrates were generally hydrolyzed more efficiently. Thc_Cut1 hydrolyzed aromatic ester bonds more efficiently than HiC resulting in up to 3-fold higher concentrations of the monomeric hydrolysis product Ta. Nevertheless, HiC exhibited a higher overall hydrolytic activity on the tested polyesters, resulting in 2-fold higher concentration of released molecules. Thermogravimetry and differential scanning calorimetry (TG-DSC) of the polymeric model substrates revealed a general trend that a lower difference between melting temperature (Tm) and the temperature at which the enzymatic degradation takes place resulted in higher susceptibility to enzymatic hydrolysis. | |||
Substrate specificities of cutinases on aliphatic-aromatic polyesters and on their model substrates.,Perz V, Bleymaier K, Sinkel C, Kueper U, Bonnekessel M, Ribitsch D, Guebitz GM N Biotechnol. 2016 Mar 25;33(2):295-304. doi: 10.1016/j.nbt.2015.11.004. Epub, 2015 Nov 21. PMID:26594021<ref>PMID:26594021</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 5a2g" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Baumschlager, A]] | [[Category: Baumschlager, A]] | ||
[[Category: | [[Category: Bleymaier, K]] | ||
[[Category: | [[Category: Gruber, K]] | ||
[[Category: Guebitz, G M]] | |||
[[Category: Hromic, A]] | |||
[[Category: Keller, T Pavkov]] | |||
[[Category: Kueper, U]] | [[Category: Kueper, U]] | ||
[[Category: Mayrhofer, C]] | [[Category: Mayrhofer, C]] | ||
[[Category: | [[Category: Perz, V]] | ||
[[Category: | [[Category: Ribitsch, D]] | ||
[[Category: Schlegel, K A]] | |||
[[Category: Sinkel, C]] | |||
[[Category: Steinkellner, G]] | [[Category: Steinkellner, G]] | ||
[[Category: | [[Category: Zankel, A]] | ||
[[Category: | [[Category: Zitzenbacher, S]] | ||
[[Category: | [[Category: Anaerobic biodegradation]] | ||
[[Category: | [[Category: Anaerobic esterase]] | ||
[[Category: | [[Category: Biogas batch]] | ||
[[Category: | [[Category: Clostridium hathewayi]] | ||
[[Category: Hydrolase]] | |||
[[Category: Microbial polyesterase]] | |||
[[Category: Polyester biodegradation]] | |||
Revision as of 21:04, 26 February 2016
An esterase from anaerobic Clostridium hathewayi can hydrolyze aliphatic aromatic polyestersAn esterase from anaerobic Clostridium hathewayi can hydrolyze aliphatic aromatic polyesters
Structural highlights
Publication Abstract from PubMedThe enzymatic hydrolysis of the biodegradable polyester ecoflex and of a variety of oligomeric and polymeric ecoflex model substrates was investigated. For this purpose, substrate specificities of two enzymes of typical compost inhabitants, namely a fungal cutinase from Humicola insolens (HiC) and a bacterial cutinase from Thermobifida cellulosilytica (Thc_Cut1) were compared. Model substrates were systematically designed with variations of the chain length of the alcohol and the acid as well as with varying content of the aromatic constituent terephthalic acid (Ta). HPLC/MS identification and quantification of the hydrolysis products terephthalic acid (Ta), benzoic acid (Ba), adipic acid (Ada), mono(4-hydroxybutyl) terephthalate (BTa), mono-(2-hydroxyethyl) terephthalate (ETa), mono-(6-hydroxyhexyl) terephthalate (HTa) and bis(4-hydroxybutyl) terephthalate (BTaB) indicated that these enzymes indeed hydrolyze the tested esters. Shorter terminal chain length acids but longer chain length alcohols in oligomeric model substrates were generally hydrolyzed more efficiently. Thc_Cut1 hydrolyzed aromatic ester bonds more efficiently than HiC resulting in up to 3-fold higher concentrations of the monomeric hydrolysis product Ta. Nevertheless, HiC exhibited a higher overall hydrolytic activity on the tested polyesters, resulting in 2-fold higher concentration of released molecules. Thermogravimetry and differential scanning calorimetry (TG-DSC) of the polymeric model substrates revealed a general trend that a lower difference between melting temperature (Tm) and the temperature at which the enzymatic degradation takes place resulted in higher susceptibility to enzymatic hydrolysis. Substrate specificities of cutinases on aliphatic-aromatic polyesters and on their model substrates.,Perz V, Bleymaier K, Sinkel C, Kueper U, Bonnekessel M, Ribitsch D, Guebitz GM N Biotechnol. 2016 Mar 25;33(2):295-304. doi: 10.1016/j.nbt.2015.11.004. Epub, 2015 Nov 21. PMID:26594021[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)
OCA- Baumschlager, A
- Bleymaier, K
- Gruber, K
- Guebitz, G M
- Hromic, A
- Keller, T Pavkov
- Kueper, U
- Mayrhofer, C
- Perz, V
- Ribitsch, D
- Schlegel, K A
- Sinkel, C
- Steinkellner, G
- Zankel, A
- Zitzenbacher, S
- Anaerobic biodegradation
- Anaerobic esterase
- Biogas batch
- Clostridium hathewayi
- Hydrolase
- Microbial polyesterase
- Polyester biodegradation