Research breakthrough for the protein factories of tomorrow

September 22, 2006

Using a kind of molecular ‘hip joint operation,’ researchers at Uppsala University have succeeded in replacing a natural amino acid in a protein with an artificial one. This step forward opens the possibility of creating proteins with entirely new properties that can be tailored to biotechnological applications. The study is presented in the latest issue of the prestigious journal Chemistry and Biology.

All proteins are made out of twenty amino acids. These natural building blocks determine the structure and function of the protein. Bengt Mannervik’s research team at Uppsala University has now demonstrated that artificial amino acids can be exchanged for a natural one that is critical to the stability and catalytic properties of the protein. The study opens the possibility of a new chemical biology where entirely new properties can be custom made for biotechnological applications.

Their research work has focused on an important enzyme, glutation transferase, which participates in the detoxification of the body from carcinogenic substances. The enzyme is made up of two identical protein structures that are joined by a contact similar to a key that fits a lock. The key is an amino acid that fits a cavity in the neighboring protein structure. In their work, the key has been replaced by artificial amino acids. Some exchanges yielded a fully active enzyme, while others did not.

The current study is a molecular equivalent to a hip joint operation, where the natural joint is replaced by an artificial part that is more robust. With the same methodology it is also possible not only to replace natural structures and functions but also to give proteins entirely new properties. Using simple chemistry, the twenty existent amino acids can be exchanged for hundreds of new chemical structures. In this way new proteins can be created with building blocks far beyond the limits of the genetic code.

Source: Uppsala Universitet

Explore further: Turning up the tap on microbes leads to better protein patenting

Related Stories

Recommended for you

NASA's space-station resupply missions to relaunch

November 29, 2015

NASA's commercial space program returns to flight this week as one of its private cargo haulers, Orbital ATK, is to launch its first supply shipment to the International Space Station in more than 13 months.

CERN collides heavy nuclei at new record high energy

November 25, 2015

The world's most powerful accelerator, the 27 km long Large Hadron Collider (LHC) operating at CERN in Geneva established collisions between lead nuclei, this morning, at the highest energies ever. The LHC has been colliding ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.