By Ayo Onikoyi

Nigeria’s researcher based in the U.S., Dr. Olamilekan Joseph Ibukun, has explained how the structure and behavior of peptides can be influenced by spacers, providing groundbreaking insights into biomolecular aggregation and material science.

In his latest study, Dr. Ibukun highlighted how different types of spacers in FF peptide mimetics can alter their structure and self-assembly, paving the way for advances in the design of functional biomaterials.

He said this in his new study, conducted with a team of researchers from the Indian Institute of Science Education and Research (IISER), where they synthesized a series of FF peptide mimetics with both rigid and flexible spacers. The study was aimed at understanding how the structural properties of these peptides could be manipulated by their spacers.

 “We wanted to explore how small changes in the molecular structure of peptides—particularly the use of different spacers—can affect their ability to assemble into larger, more complex structures,” Dr. Ibukun explained.

The research uncovered that peptides with rigid spacers, like m-diamino benzene, adopted a highly organized duplex structure, stabilized by multiple intermolecular hydrogen bonds. Dr. Ibukun pointed out that the results of their X-ray single crystal analysis provided a clear view of this structure. “The duplex formation was quite fascinating. We found that it was stabilized by three distinct types of π-π interactions—face-to-face, face-to-edge, and edge-to-edge interactions. This type of stabilization gives the peptide a rigid, durable structure,” he said.

Beyond the molecular level, these peptides were found to form larger, complex sheet-like structures, which were stabilized by hydrogen bonds and π-π stacking interactions. According to Dr. Ibukun, this ability to self-assemble into such structured forms opens up new possibilities for the creation of advanced materials. “The potential applications for these peptide assemblies are enormous,” he remarked. “By controlling the way they organize themselves, we can potentially create materials with specific properties for use in nanotechnology, drug delivery, or even tissue engineering.”

Dr. Ibukun also discussed the behavior of FF peptide mimetics with flexible spacers, such as 1,4-butadine and m-xylylenediamine, which exhibited a unique ability to form stimuli-responsive organogels in a wide range of solvents, including methanol. “This is a significant discovery,” he emphasized. “These peptides can respond to external stimuli, forming gels that could be used in smart materials or adaptive systems in biomedical applications.”

The team’s research was further supported by rheology experiments, which demonstrated the formation of strong physical crosslinked gels. These gels were shown to exhibit robust physical properties, as confirmed by variations in angular frequency and oscillatory strain. Dr. Ibukun noted that this demonstrated the versatility of the FF peptide mimetics. “The strength and resilience of these gels make them promising candidates for use in various fields, including biotechnology and material science.”

Moreover, the study included SE-FEM imaging, which revealed how the network morphology of these gels varied depending on the solvent used. “This finding adds another dimension to our understanding,” said Dr. Ibukun. “It shows that we can tailor the structure and properties of these materials simply by altering the environment in which they are formed. This level of control is crucial for designing materials with specific functions.”

The implications of this research are far-reaching, according to Dr. Ibukun. He explained that the ability to manipulate the assembly of peptide mimetics could lead to the development of new biomaterials with practical applications in healthcare, electronics, and nanotechnology. “We’re now at a point where we can use molecular building blocks to design and create materials that are not only functional but adaptable to their environment,” he said.

Looking forward, Dr. Ibukun is optimistic about the future applications of his findings. “This study has given us valuable insights into how peptide mimetics can be used to create innovative materials,” he said. “I believe that with further research, we can unlock new ways to harness the self-assembly of peptides for use in areas ranging from drug delivery to environmental sustainability.”

Dr. Ibukun’s contributions to peptide chemistry and material science demonstrate the growing impact of Nigerian researchers on the global stage. His dedication to advancing scientific knowledge through rigorous research continues to push the boundaries of what is possible, inspiring new possibilities in both the scientific community and beyond. “The work we’re doing now is just the beginning,” he concluded. “There is still so much potential to be explored, and I’m excited about where this research will lead us.”