Human Orphan Cytochrome P450 2U1 Catalyzes the ω-Hydroxylation of Leukotriene B4

• Published in: International journal of molecular sciences 2022-12, Vol.23 (23), p.14615
• Main Authors: Nouri, Khawla, Pietrancosta, Nicolas, Le Corre, Laurent, Dansette, Patrick M., Mansuy, Daniel, Boucher, Jean-Luc
• Format: Article
• Language: English
• Subjects: Bioenergetics; Bioinformatics; brain inflammatory disorders; Chemical Sciences; Communication; Cytochrome; Cytochrome P450; cytochrome P450 2U1; Cytochromes P450; Experiments; Fatty acids; Genomes; Hereditary spastic paraplegia; Hydroxylation; Inflammation; Inflammatory diseases; Ischemia; Leukotriene B4; Metabolism; Metabolites; Mitochondria; Mutation; Paraplegics; Physiology; Proteins; Regioselectivity; Yeast
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms232314615

Cytochrome P450 2U1 (CYP2U1) identified from the human genome remains poorly known since few data are presently available on its physiological function(s) and substrate(s) specificity. CYP2U1 mutations are associated with complicated forms of hereditary spastic paraplegia, alterations of mitochondrial architecture and bioenergetics. In order to better know the biological roles of CYP2U1, we used a bioinformatics approach. The analysis of the data invited us to focus on leukotriene B4 (LTB4), an important inflammatory mediator. Here, we show that CYP2U1 efficiently catalyzes the hydroxylation of LTB4 predominantly on its ω-position. We also report docking experiments of LTB4 in a 3D model of truncated CYP2U1 that are in agreement with this hydroxylation regioselectivity. The involvement of CYP2U1 in the metabolism of LTB4 could have strong physiological consequences in cerebral pathologies including ischemic stroke because CYP2U1 is predominantly expressed in the brain.