Bio-wax components are produced in specialized glands of animals, plants as well as other organisms via well-characterized biosynthetic pathways. Fatty acyl alcohols are the key components for synthesis of wax. A fatty acyl-CoA reductase (FAR) is often essential in this biosynthetic pathway. The subcellular localization of FARs is crucial for understanding the process of synthesis and transport of wax to the surface of body. In this study, we characterized the subcellular localization of EpFAR from the scale insect Ericerus pela using an immunofluorescence assay of the insect cells and a bioinformatics analysis. The result of immunofluorescence assay showed EpFAR to be localized to the cytoplasmic region, and the observed fluorescence pattern was characteristic of endoplasmic reticulum (ER) proteins. Comparative analysis of the prediction results showed EpFAR was localized to the ER membrane. These results, combined with the localization of other FARs, suggested the importance of ER as a related subcellular site of white wax biosynthesis.
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