HPL — Capsicum annuum

Summary

T459_19908 (HPL, also known as CaCYP74B2, CaHPL1) on pepper chromosome 7 encodes a chloroplastic linolenate hydroperoxide lyase, a cytochrome P450 family member with allene oxide synthase, allene-oxide cyclase, hydro-lyase, lyase, monooxygenase and oxidoreductase activities, and binds iron and heme. The gene is associated with oxylipin, jasmonic acid, terpenoid and fatty acid biosynthesis, sterol metabolism, jasmonic acid signaling, virus-induced PTGS, wound response and defense. The product localizes to the chloroplast outer, inner, envelope and thylakoid membranes. HPL is linked to fruit flavor and aroma, C6 volatile production, hexenal signaling, arabidopside accumulation, and susceptibility to Pseudomonas syringae. Related genes in other species are linked to green leaf volatile biosynthesis, aromatic volatile production, indirect defense, aphid resistance and insect resistance.