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27 May 2024 | Story Leonie Bolleurs | Photo Supplied
Inaugural
At the inaugural lecture of Prof Dirk Opperman were, from the left: Prof Opperman, Prof Vasu Reddy, Prof Koos Albertyn, Head of the Department of Microbiology and Biochemistry, and Prof Paul Oberholster, Dean of the Faculty of Natural and Agricultural Sciences.

Prof Dirk Opperman, a distinguished biochemist in the Department of Microbiology and Biochemistry, recently (21 May 2024) delivered his inaugural lecture on the Bloemfontein Campus of the University of the Free State (UFS).

The title of his lecture was: Exploring, Exploiting, and Evolving Life at the Atomic Level.

Prof Vasu Reddy, Deputy Vice-Chancellor: Research and Internationalisation at the UFS, welcomed guests, stating, "An inaugural lecture is a major milestone, celebrating a life’s work that culminates in the title of professor. It marks an important chapter in an academic career, with much more to be achieved in the journey of producing important knowledge.”

He believes that an event such as this highlights the university’s pride in the achievements of its academic staff and aligns with Vision 130. “The UFS is proud to host such lectures, as they are significant moments to reveal and showcase the value of excellence in our knowledge pool in research, teaching, and innovation. As a university, we strive to make a difference through groundbreaking work, particularly in addressing society's challenges,” said Prof Reddy, emphasising that this topic truly speaks to the university’s commitment to impactful work in the hard sciences.

Deciphering the unknown

The topic of the lecture captures the essence of Prof Opperman’s research. He explains that ‘exploring’ refers to the determination of the three-dimensional structures of proteins and enzymes. ‘Exploiting’ involves the use of these enzymes to convert substrates into products of value, and ‘evolving’ pertains to mutating the DNA to change the protein, giving it different functions, activities, selectivity, or specificities.

In his lecture, he remarked that if we know the structures of these proteins and enzymes, we can explore what to do with them and how to change them. According to him, there are the unknown knowns, the unknown unknowns, and the known unknowns. “We may know of specific activities and reactions by microorganisms, but we don’t know which enzyme is responsible; similarly, we can know the reactivity of an enzyme, but not necessarily their true physiological functions. I am trying to figure out all these unknowns,” he said.

In his lecture, he also raised the question of whether AI could replace experimental determination of protein structures. "No, not yet; it is only predictions," he believes, commenting that navigating the unknown unknowns is a dangerous place in science.

Establishing the field of structural biology

Prof Opperman, born and raised in the Free State, completed his undergraduate studies at the UFS. Later, in 2008, he obtained his PhD in Biochemistry from the same university. Following his doctoral studies, he conducted postdoctoral research on directed evolution under the guidance of Prof Manfred T Reetz at the Max Planck Institute for Coal Research in Germany, one of the world’s top institutions.

In 2010, he was appointed to the Department of Microbiology and Biochemistry at the UFS, where he has since established the field of structural biology, setting up the infrastructure essential for the advancement thereof. This includes equipment, techniques, and methods for determining the three-dimensional structure of proteins. “It is done using protein crystallisation and then X-ray diffraction,” he explains. Most of these X-ray diffraction experiments are then performed at particle accelerators called synchrotrons, such as Diamond Light Source (UK), which can produce intense X-rays.

His current research explores the interface of evolutionary and structure-function relationships of biocatalysts, with a particular focus on their application in green chemistry. Prof Opperman says that understanding both the structure and the function of an enzyme allows one to manipulate it to perform other functions.

Contributing to the broader goals of sustainable development

One of the projects he is working on highlights the potential for sustainable practices in waste management. Prof Opperman is currently part of a European Research Area Network Cofund partnership on Food Systems and Climate (FOSC), which focuses on developing biocatalysts for upcycling waste. An aspect of this work involves studying enzymes that degrade feathers, thereby converting feather waste into useful products such as fertiliser.

Regarding the contribution of his research to the broader goals of sustainable development and environmental protection, he says that enzymes are the base for biotechnology and the bioeconomy. “They can be sustainably produced, the reactions are environmentally friendly, and the resulting products can be classified as natural. There’s no need to use sources that are not sustainable to extract some of these molecules from,” he explains.

His significant contributions to the field are reflected in more than 50 authored and co-authored papers, some of which are published in prestigious journals such as Science, Nature Communications, and Angewandte Chemie. As an NRF B-rated researcher, his work has received funding from various local and international organisations, including industries such as Sasol and the Global Challenges Research Fund.

News Archive

Prof Steyn to receive Jan H Marais Prize in Stellenbosch
2017-05-09

Description: Prof Jaap Steyn  Tags: Prof Jaap Steyn

Prof Jaap Steyn, who started his career as
journalist at Volksblad, later entered the academy,
and was a professor at the University of the
Free State for many years.
Photo: Marthie Kemp

Although Prof Jaap Steyn will be honoured officially for his contribution to Afrikaans as an academic language at the end of this month, he only became aware of his nomination after he had won the award.

According to this research fellow in the Department of Afrikaans and Dutch, German and French at the University of the Free State (UFS), he is grateful for the recognition. He has recently been awarded the Jan H Marais Prize for his outstanding contribution to Afrikaans.

Former Kovsie honoured together with Prof Jan van der Watt
According to a statement by the South African Academy for Science and Arts, the award was jointly made to Prof Steyn, who is probably the best-known South African language historian, and Prof Jan van der Watt van Nijmegen from the Netherlands. The prize money of R500 000, which they will share, will be presented in Stellenbosch on 30 May 2017.

Prof Steyn is a former Kovsie, who was a research professor at the UFS from 1985 to 1997, and at the age of 78 is still a research fellow. “After the announcement of the prize, I learnt that I was nominated by two of my colleagues,” he says.

His most difficult work was probably also his best

Over the past 50 years several of his publications, biographies, and books have seen the light. He believes that nothing one does is perfect. His most difficult work was the biography of NP van Wyk Louw. “It was probably also my best work,” he says. “The book I enjoyed working on most, was the biography of the author MER, or ME Rothmann.”

Prof Steyn has also received awards such as the Stals Prize, the Louis Hiemstra Prize, the NP van Wyk Louw medal, and honorary membership from the South African Academy for Science and Arts.

He says the staff in the Department of Afrikaans and Dutch, German and French are very friendly and helpful to still render him assistance as a research fellow.


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