IISc researchers develop novel method for mass production of recombinant proteins
The Hindu
IISc researchers develop safer method for mass-producing recombinant proteins using yeast cell factories without hazardous methanol.
Researchers at the Department of Biochemistry, Indian Institute of Science, have developed a novel method for the production of recombinant proteins.
According to IISc, mass production of recombinant proteins using yeast cell factories needs methanol, a compound that requires safe handling, carries the risk of catching fire, and sometimes produces harmful byproducts. However, researchers have now developed an alternative, safer process that instead relies on a common food additive called monosodium glutamate (MSG).
Recombinant proteins, such as vaccine antigens, insulin and monoclonal antibodies, are mass-produced by growing modified bacterial, viral or mammalian cells in large bioreactors. The most widely used organism is the yeast Pichia pastoris (now called Komagataella phaffii).
“It contains a unique promoter – a specific gene region which can be activated by methanol. This promoter codes for an enzyme called alcohol oxidase (AOX),” IISc said.
To mass-produce a recombinant protein, the gene coding for that protein is spliced into the yeast genome right next to the AOX promoter. The yeast cells are then fed glycerol or glucose as the carbon source. Once enough cells have formed, methanol is added, which activates the AOX promoter, and the cells start producing the recombinant protein in copious amounts.
“Most industries use this methanol-induced process for producing recombinant proteins. However, methanol is highly flammable and hazardous, requiring stringent safety precautions. Methanol is also metabolized to form hydrogen peroxide which can induce oxidative stress in the yeast cells or damage the recombinant proteins,” said Prof P.N. Rangarajan, corresponding author of the study published in Microbial Cell Factories.
To solve this problem, Trishna Dey, a former PhD student at the Department of Biochemistry, started looking for alternatives. After an extensive search, the team found that monosodium glutamate (MSG), a USFDA-approved food additive, can activate a different promoter in the yeast genome that codes for an enzyme called phosphoenolpyruvate carboxykinase (PEPCK). Activating this promoter with MSG led to protein production similar to methanol activation of the AOX promoter.
Mahindra’s XEV 9S is a modern, family-focused electric SUV with premium design, a spacious tech-rich cabin, refined performance and advanced safety features. Discover variants, pricing and real-world impressions in our detailed review.
Samantha interview: On pickleball, her battles with a rare autoimmune condition and learnings
Experience the thrilling Akkulam Glass Bridge in Thiruvananthapuram, offering stunning views and adventure activities for all ages.
Climate scientists and advocates long held an optimistic belief that once impacts became undeniable, people and governments would act. This overestimated our collective response capacity while underestimating our psychological tendency to normalise, says Rachit Dubey, assistant professor at the department of communication, University of California.
Indian astronaut Shubhanshu Shukla predicts a transformative decade for India’s space exploration and international collaboration.