Download MendeleyDiscovery and Molecular Characterization of a Novel 9 S -Lipoxygenase from Enhygromyxa salina for Fatty Acid Biotransformations.
Kim, J.W., Yoon, J.H., Lee, J., Cha, H.J., Seo, P.W., Lee, T.E., Bornscheuer, U.T., Oh, D.K., Park, J.B., Kim, J.S.(2024) J Agric Food Chem 72: 26263-26273
- PubMed: 39536131
- DOI: https://doi.org/10.1021/acs.jafc.4c01258
- Primary Citation of Related Structures:
8X8F - PubMed Abstract:
Iron-dependent lipoxygenases (LOXs) are involved in the synthesis of oxylipins from polyunsaturated fatty acids. However, they are usually difficult to overexpress in functional form in microbial cell factories. Moreover, 9-LOXs, generating 9-hydroperoxy fatty acids from C18 polyunsaturated fatty acids, have rarely been found from microbial sources. Here, we discovered a novel 9 S -LOX in the marine myxobacterium Enhygromyxa salina (Es-9 S -LOX). The recombinant enzyme produced in Escherichia coli exhibited remarkable activity in the dioxygenation of linoleic acid (LA, 1 ), α-linolenic acid, γ-linolenic acid, and arachidonic acid specifically at the C9 position to yield the product with ( S )-configuration at catalytic efficiency of 3.94, 1.42, 1.38, and 0.69 μM -1 ·s -1 , respectively. The elucidated X-ray crystal structure of Es-9 S -LOX reveals a long and narrow hydrophobic pocket that allows the substrate to be near the metal ion and the oxygen tunnel. The enzyme was successfully used in a chemoenzymatic reaction to generate a hydroxy fatty acid from LA. Our study thus contributes to the valorization of renewable polyunsaturated fatty acids into a variety of fatty acid derivatives, including hydroxy fatty acids.
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea.
Organizational Affiliation:
