In:
Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2020-11-26)
Abstract:
North Pacific krill ( Euphausia pacifica ) contain 8 R -hydroxy-eicosapentaenoic acid (8 R -HEPE), 8 R -hydroxy-eicosatetraenoic acid (8 R -HETE) and 10 R -hydroxy-docosahexaenoic acid (10 R -HDHA). These findings indicate that E. pacifica must possess an R type lipoxygenase, although no such enzyme has been identified in krill. We analyzed E. pacifica cDNA sequence using next generation sequencing and identified two lipoxygenase genes ( PK-LOX1 and 2 ). PK-LOX1 and PK-LOX2 encode proteins of 691 and 686 amino acids, respectively. Recombinant PK-LOX1 was generated in Sf9 cells using a baculovirus expression system. PK-LOX1 metabolizes eicosapentaenoic acid (EPA) to 8 R -HEPE, arachidonic acid (ARA) to 8 R -HETE and docosahexaenoic acid (DHA) to 10 R -HDHA. Moreover, PK-LOX1 had higher activity for EPA than ARA and DHA. In addition, PK-LOX1 also metabolizes 17 S -HDHA to 10 R ,17 S -dihydroxy-docosahexaenoic acid (10 R ,17 S -DiHDHA). PK-LOX1 is a novel lipoxygenase that acts as an 8 R -lipoxygenase for EPA and 10 R -lipoxygenase for DHA and 17 S -HDHA. Our findings show PK-LOX1 facilitates the enzymatic production of hydroxy fatty acids, which are of value to the healthcare sector.
Type of Medium:
Online Resource
ISSN:
2045-2322
DOI:
10.1038/s41598-020-77386-3
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2020
detail.hit.zdb_id:
2615211-3
