This discovery, published in the latest issue of The Plant Cell, contributes, moreover, to refuting one of the current scientific dogmas regarding the mechanisms of protein transportation in plant cells.
The research was carried out by a team from the Institute of Agrobiotechnology and Natural Resources (a centre jointly run by the CSIC, the Public University of Navarre and the Government of Navarre), made up of Javier Pozueta, Francisco José Muñoz and Edurne Baroja. These scientists have been aided by a research team from Niigata University (Japan).
Specifically, the study describes a new route for the traffic of proteins from the reticular/Golgi system where there are glycosylates, towards the chloroplasts of the plant cell. Some of these glycosylated recombinant proteins have significant antigenic power of great pharmaceutical interest.
Conventional biotechnological methods enable the cells to accumulate very limited quantities of glycosylate recombinant proteins. The chloroplast is a cell organ with great capacity for storing proteins. However, it is incapable of producing glycosylate proteins.
The newly discovered route connects the cell organ where the proteins are glycosylated, the reticulum, with the chloroplasts. This discovery signifies the first step in the development of plants and algae that accumulate in their chloroplasts large amounts of glycosylate recombinant proteins with sig