TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Coenen, Anna
A1  - Marti, Valentin Gala
A1  - Müller, Kira
A1  - Sheremetiev, Maria
A1  - Finamore, Lorenzo
A1  - Schörken, Ulrich
T1  - Synthesis of Polymer Precursor 12-Oxododecenoic Acid Utilizing Recombinant Papaya Hydroperoxide Lyase in an Enzyme Cascade
JF  - Applied Biochemistry and Biotechnology
N2  - Hydroperoxide lyases (HPLs) catalyze the splitting of 13S-hydroperoxyoctadecadienoic acid (13S-HPODE) into the green note flavor hexanal and 12-oxo-9(Z)-dodecenoic acid, which is not yet used industrially. Here, HPL from Carica papaya (HPLCP) was cloned and functionally expressed in Escherichia coli to investigate synthesis of 12-oxo-9(Z)-dodecenoic acid in detail. To improve the low catalytic activity of full-length HPLCP, the hydrophobic, non-conserved N-terminal sequence was deleted. This enhanced enzyme activity from initial 10 to 40 U/l. With optimization of solubilization buffer, expression media enzyme activity was increased to 2700 U/l. The tetrameric enzyme was produced in a 1.5 l fermenter and enriched by affinity chromatography. The enzyme preparation possesses a slightly acidic pH optimum and a catalytic efficiency (kcat/KM) of 2.73 × 106 s−1·M−1 towards 13S-HPODE. Interestingly, HPLCP-N could be applied for the synthesis of 12-oxo-9(Z)-dodecenoic acid, and 1 mM of 13S-HPODE was transformed in just 10 s with a yield of 90%. At protein concentrations of 10 mg/ml, the slow formation of the 10(E)-isomer traumatin was observed, pointing to a non-enzymatic isomerization process. Bearing this in mind, a one-pot enzyme cascade starting from safflower oil was developed with consecutive addition of Pseudomonas fluorescens lipase, Glycine max lipoxygenase (LOX-1), and HPLCP-N. A yield of 43% was obtained upon fast extraction of the reaction mixtures after 1 min of HPLCP-N reaction. This work provides first insights into an enzyme cascade synthesis of 12-oxo-9(Z)-dodecenoic acid, which may serve as a bifunctional precursor for bio-based polymer synthesis.
KW  - Hydroperoxide Lyase
KW  - 12-Oxododecenoic Acid
KW  - Hexanal
KW  - Enzyme Cascade
KW  - Polymer Precursor
Y1  - 2022
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:832-epub4-27746
SN  - 0273-2289
SS  - 0273-2289
SN  - 1559-0291
SS  - 1559-0291
U6  - https://doi.org/10.1007/s12010-022-04095-0
DO  - https://doi.org/10.1007/s12010-022-04095-0
VL  - 194
IS  - 12
SP  - 6194
EP  - 6212
S1  - 19
PB  - Springer US
ER  -