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UFS busy with exciting research into flavours and fragrances

11 July 2022 | Story Andre Damons | Photo Supplied

Prof Martie Smith and Prof Drik Opperman — Prof Martie Smit and Prof Dirk Opperman in the Department of Microbiology and Biochemistry filed a patent entitled “Process for the chemical modification of alkanes, fatty acids and fatty alcohols”.

Flavours and fragrances have a wide application in the food, feed, cosmetic, chemical and pharmaceutical sectors. Many flavour compounds are still produced via chemical synthesis or via extraction from plant or animal sources. However, there is increasing interest in their bio-production or the use of flavour compounds of (micro) biological origin.

One reason for this shift is that chemical synthesis often uses environmentally unfriendly processes. Chemical synthesis usually also produces racemic mixtures with the second enantiomer, mirror image of the looked-for compound, often having undesirable organoleptic properties. Furthermore, the consumer has developed a “chemophobia”-attitude towards synthetic chemical compounds, especially when related to food and home-care products. This applies even to nature-identical compounds – products that occur in nature but are produced via a non-natural chemical process. Products produced with the use of enzymes or microbes from “natural” substrates can be labelled “natural”. The flavour and fragrance industry thus pay higher prices for such products labelled as “natural”.

The invention

A University of the Free State (UFS) team, led by Prof Martie Smit and Prof Dirk Opperman in the Department of Microbiology and Biochemistry are conducting exciting research in this area. They filed a patent entitled “Process for the chemical modification of alkanes, fatty acids and fatty alcohols”.

The invention relates to a process for the enzymatic in-chain hydroxylation of C12 to C16 fatty acids, alcohols, and alkanes. Hydroxylation of C12 fatty acid and alcohol provides routes for the synthesis of “natural” δ-dodecalactone. The advantage of these routes is that they do not rely on massoia lactones. Massoia lactones are derived from the bark of Massoia trees which grow in Indonesia. Harvesting of the bark kills the trees.

The cytochrome P450 enzymes (P450s) claimed in this patent are to the inventors’ knowledge the most regioselective enzymes described thus far that can be used for the synthesis of δ-dodecalactone from lauric acid or 1-dodecanol. The approach that the technology takes is to claim cytochrome P450 enzymes that share 70 % amino acid identity to a set of selected P450s for the regioselective hydroxylation of lauric acid and 1-dodecanol to synthesise δ-dodecalactone.

Still in early stage

The current state of development is early stage with the technology only demonstrated in the laboratory on a small scale (100-200 ml). Before the technology can be commercialised the team would need to further improve the regioselectivity and stability of the P450s and proof that the reactions can be scaled up in bioreactors. The technology will probably be delivered as an enzyme (amino acid sequence) with the desired properties.

There are other research groups working on a synthetic biology approach for the de novo synthesis of δ-dodecalactone from glucose by genetically engineered microbes. It is still unclear how such a process will compare in terms of product yields, economics and environmental impact with the processes proposed by the UFS patent.

If the team had to partner with a commercial company, their first choice would be to work with an established flavour and fragrance company. Another possibility would be the small French flavour and fragrance company that Dr Alizé Pennec, the post-doc and co-inventor who initially discovered the unique P450 activity, is working for.

Please view the videos for more information on patents.

The Vice-Rector: Research and Internationalisation has released two new calls for applications for funding. Academic staff and researchers are encouraged to submit applications for these funds. At this stage we are not accepting projects from Research Fellows.

The two funds are:

1. The Industrial Engagement Fund

2. The Intellectual Property Commercialisation Fund

Each fund has its own guidelines and application process. The guidelines are attached. The applications must be filled in on RIMS.

The RIMS application forms can be found through this link

For more information please click the documents below:

IP Commercialisation Fund Concept Note

The UFS Industry Engagement Fund Concept Note

News Archive

A magnificent Winter Graduation Ceremony

2013-06-27

28 June 2013
Photo: Johan Roux

Winter Graduation video (YouTube)

The way to immortalise a person, is to live by his example. PhD and master's graduates were imbued by the following message from Dr Khotso Mokhele, Chancellor of the University of the Free State (UFS), during the UFS Winter Graduation Ceremony: to follow Nelson Mandela's majestic example is to guarantee that his life was not in vain.

Dr Mokhele honoured the graduates for their achievements "that clearly did not come easy", referring to the sacrifices on their part and the role of their support structures.

He also praised members of the UFS' leadership team who contributed academically to the excellent standards. Prof Teuns Verschoor, former Vice-Rector: Institutional Affairs, and Prof Driekie Hay, Vice-Rector: Academic, were especially mentioned for their role as respectively co-promoter and promoter of two PhD graduates.

A total of 63 doctorates and 414 master's degrees were awarded to graduates from South Africa, Nigeria, Lesotho, Uganda and Zimbabwe on Thursday 27 June 2013.

On the previous day, the School of Open Learning kicked off the graduation event by conferring 320 qualifications.

The graduates, most of them full-time educators, received qualifications ranging from certificates to diplomas.

"I hope that you will plough back what you have learned and that this qualification will make you a better educator, an inspired one, one that will relentlessly put your efforts into increasing a better future for our children," Prof Hay said, highlighting challenges in South Africa's education system.

"Become enthused, obsessed and passionate to change the education system. Be the change agent in your schools to contribute in giving the quality education our children so desperately need," she said.

An exceptional moment at this year's graduation ceremony was when the two daughters of an academic, Prof Dave Lubbe of the Centre for Accounting, obtained their master's degrees. "It is indeed a highlight in my career that my daughters received their master's degrees cum laude at the same graduation ceremony, under my supervision!"

Prof Lubbe's two daughters, Nandi Lubbe and Leandi Steenkamp, both received their MCom with distinctions in Accounting. They completed their degrees under the supervision of Prof Lubbe and Nandi also won the Dean's medal as the best M student in the Faculty of Economic and Management Sciences.

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