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Home NEWS Science News Chemistry

New type of triterpenes discovered

Bioengineer by Bioengineer
June 1, 2022
in Chemistry
Reading Time: 5 mins read
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Novel pathway for the biosynthesis of triterpenes
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A remarkable discovery and collaborative effort have revealed a new type of triterpenes, a group of organic compounds which are an important source of many medicines. Until now, all triterpenes were believed to be derived from squalene, itself a type of triterpene. However, for the very first time, researchers witnessed biosynthesis, the formation of complex compounds from simple ones in living organisms, of triterpenes in fungi without the use of squalene. This important discovery opens up a whole new world of possibilities for pharmaceutical science.

Novel pathway for the biosynthesis of triterpenes

Credit: Ikuro Abe, 2022

A remarkable discovery and collaborative effort have revealed a new type of triterpenes, a group of organic compounds which are an important source of many medicines. Until now, all triterpenes were believed to be derived from squalene, itself a type of triterpene. However, for the very first time, researchers witnessed biosynthesis, the formation of complex compounds from simple ones in living organisms, of triterpenes in fungi without the use of squalene. This important discovery opens up a whole new world of possibilities for pharmaceutical science.

 

Triterpenes are organic compounds which are abundantly found in animals, plants, microorganisms and even us. About 20,000 different triterpenes have been found and they are widely used in cosmetics, food supplements and, most importantly, medicine, thanks to their anti-inflammatory, anti-cancer, anti-diabetic and other valuable properties. Until now, all known triterpenes were thought to be generated from a common precursor or source, squalene.

 

However, as revealed in Nature, a collaborative effort among the University of Tokyo and KEK in Japan, Wuhan University in China and Bonn University in Germany, has found a new type of triterpenes that doesn’t require squalene.

 

“Nobody could have imagined this happening in nature. This is the discovery of a new biosynthetic machine,” explained Professor Ikuro Abe from the Graduate School of Pharmaceutical Sciences at the University of Tokyo.

 

Often, multiple enzyme reactions are needed to create complex molecular compounds, such as when our bodies use squalene to create hormones and bile acid. However, in just a single enzyme reaction, a simple molecule called a C5 isoprene unit, or building block, was the starter to construct a very complex triterpene molecular structure.

 

The discovery happened almost by accident by the team at Wuhan University, who were working on genome mining to find new natural products. They were not necessarily searching for triterpenes, but they found new genes widely distributed in fungi. “They didn’t know the genes’ function,” said Abe. “So they did a characterization of these news genes, and one of them happened to be triterpene synthesis.”

 

That is when they asked the other teams to get involved. According to Abe, the team at Bonn University are good at chemistry, so they worked on elucidating the detailed enzyme reaction mechanism, and researchers at the University of Tokyo and KEK applied their expertise in structural analysis. He said that once you understand the structure, you can modify it. “Change something here or there and see what happens. We can understand the structure-function relationship. It’s like a puzzle,” he explained.

 

“Chemistry in nature is more efficient than the chemical synthesis we use in industry. That is why we are interested in the biosynthetic processes done in nature,” Abe said. “Nature’s method is a better, cheaper and cleaner process. We are trying to better understand how processes take place in nature so that we can recreate or redesign it in the lab, to get more and more important and useful compounds.”

 

This new discovery is only the beginning. “Now that we have solved the protein structure, we are already manipulating the biosynthetic machinery to try to produce more useful molecules, for example, for drug development,” Abe said.

 

 

###

Journal article

Hui Tao, Lukas Lauterbach, Guangkai Bian, Rong Chen, Anwei Hou, Takahiro Mori, Shu Cheng, Ben Hu, Li Lu, Xin Mu, Min Li, Naruhiko Adachi, Masato Kawasaki, Toshio Moriya, Toshiya Senda, Xinghuan Wang, Zixin Deng, Ikuro Abe, Jeroen S. Dickschat, Tiangang Liu “Discovery of non-squalene triterpenes” Nature DOI: 10.1038/s41586-022-04773-3 / URL: https://www.nature.com/articles/s41586-022-04773-3

 

Funding

This study was funded by The Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan (JSPS KAKENHI Grant Number JP16H06443, JP19K15703, JP20H00490, JP20KK0173, JP21K18246), the New Energy and Industrial Technology Development Organization (NEDO, Grant Number JPNP20011), and AMED (Grant Number JP21ak0101164). This work was also supported in part by Platform Project for Supporting Drug Discovery and Life Science Research (Basis of Supporting Innovative Drug Discovery and Life Science Research) from AMED (JP21am0101071 (support number 1553)).

 

Useful Links

Link to paper: https://www.nature.com/articles/s41586-022-04773-3

Link to Lab: https://tennen.f.u-tokyo.ac.jp/index-e.html  

 

Research Contact

 

Professor Ikuro Abe

Graduate School of Pharmaceutical Sciences, The University of Tokyo,

7-3-1 Hongo, Bunkyo-ku,

Tokyo 113-0033, Japan

Tel: 03-5841-4740

Email: [email protected]

 

Press Contact

Mrs. Nicola Burghall (she/ her)
Public Relations Group, The University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
Email: [email protected]

 

About the University of Tokyo

The University of Tokyo is Japan’s leading university and one of the world’s top research universities. The vast research output of some 6,000 researchers is published in the world’s top journals across the arts and sciences. Our vibrant student body of around 15,000 undergraduate and 15,000 graduate students includes over 4,000 international students. Find out more at www.u-tokyo.ac.jp/en/ or follow us on Twitter at @UTokyo_News_en.

 



Journal

Nature

DOI

10.1038/s41586-022-04773-3

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Discovery of non-squalene triterpenes

Article Publication Date

1-Jun-2022

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