LSU — Lactuca sativa

Summary

LsLSU (LSU, PPPS2) on chromosome 3 of garden lettuce encodes a polyprenyl diphosphate synthase with all-trans-nonaprenyl-diphosphate synthase, geranyltranstransferase, dimethylallyltransferase, farnesyltranstransferase, and FGPP synthase activities. The gene is associated with the biosynthesis of geranylgeranyl diphosphate, geranyl diphosphate, farnesyl diphosphate, isoprenoids, carotenoids, terpenoids, plastoquinone, ubiquinone, vitamin A, and vitamin B6. It is linked to responses to jasmonic acid, salicylate, herbivores, and insects, and to photosynthetic rate. The product localizes to the plastid, chloroplast thylakoid membrane, chloroplast stroma, etioplast, endoplasmic reticulum, and mitochondria, and is part of a polyprenyl diphosphate synthase complex. Related genes in other species have been linked to geranylgeranyl pyrophosphate biosynthesis and low light tolerance.