Prestigious NSF funding will enable UTSA professor to further demystify body’s metabolic processes | UTSA Today | UTSA | #education | #technology | #training


Although protein-derived cofactor studies were first conducted in genetics by Peter Schultz in 2001, Liu is applying the method to crosslink chemistry for the first time. This interdisciplinary approach will allow the UTSA researcher and his collaborators to strategically target a specific amino acid and gain a quicker and more thorough understanding of its function and purpose.

“This continued NSF support will allow my lab to continue to advance the understanding of the protein structure-function correlations using unnatural amino acid substitution through a genetic method,” said Liu, the Lutcher Brown Distinguished Chair in Biochemistry at the UTSA College of Sciences. “We are the first group to bring non-canonical amino acids incorporation through the genetic code expansion technology to a new field.”

Liu’s research career spans over 20 years and has focused on the body’s metabolism. His research expertise includes biosynthesis, enzymology and protein biochemistry. He leads the UTSA Metalloprotein Research Laboratory, which specializes in investigating how biomolecules use metals to perform chemistry necessary for life. His interdisciplinary research has been well-supported by the NSF, the National Institutes of Health, the Welch Foundation and other funding agencies.

As part of his research, Liu has been investigating cofactors that contain a cysteine-tyrosine crosslink, or chemical bond that has the ability to boost metabolic processes.

When a cysteine-tyrosine cofactor is added to an enzyme, it serves as a catalytic amplifier that speeds up the body’s metabolism. By utilizing metalloproteins—proteins that contain metals like copper and iron—some enzymes can program a protein-derived cofactor to help the body digest and metabolize food significantly faster.

“This research will lead to a better comprehension of the enzymes that control the body’s metabolism,” said Liu. “Their proper function is fundamental to understanding a lot of what we know today about nutrition and diseases such as diabetes.”

Liu and his team will work with undergraduate and graduate students to lend their expertise in studying the catalytic functions of proteins. These experiences will equip Roadrunners with the training they need to prepare for research careers in cutting-edge laboratories. It also aligns with UTSA’s strategic mission of offering classroom-to-career opportunities.

The NSF grant will also contribute to UTSA’s mission of preparing the next generation of scientists by supporting outreach activities and curriculum development in the Department of Chemistry. It will enable new distant learning programs and training opportunities for local high school students.



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