A plant signal sequence enhances the secretion of bacterial ChiA in transgenic tobacco

✍ Scribed by Peter Lund; Pamela Dunsmuir

• Book ID: 104614750
• Publisher: Springer
• Year: 1992
• Tongue: English
• Weight: 821 KB
• Volume: 18
• Category: Article
• ISSN: 0167-4412
• DOI: 10.1007/bf00018455

✦ Synopsis

When the secreted bacterial protein ChiA is expressed in transgenic tobacco, a fraction of the protein is glycosylated and secreted from the plant cells; however most of the protein remains inside the cells. We tested whether the efficiency of secretion could be improved by replacing the bacterial signal sequence with a plant signal sequence. We found the signal sequence and the first two amino acids of the PRlb protein attached to the ChiA mature protein directs complete glycosylation and secretion of the ChiA from plant cells. Glycosylation of this protein is not required for its efficient secretion from plant cells.