Tuesday, January 13, 2026

Post-translational Modifications of H3 Nucleosomal Histone Tails

Mohammad Moussa, Verrazzano Class of 2025, completed major in Biochemistry and minor in Psychology

Presenting my capstone research on histone acetylation and nucleosome dynamics stands out as one of the most rewarding moments of my undergraduate journey. After two years in Dr. Loverde's molecular dynamics lab, I was excited to share how our computational approach revealed how chemical modifications alter chromatin structure at the atomic level.

As I began my presentation, I focused on making complex biophysical concepts accessible. I used clear visuals of the nucleosome structure and dynamic simulations to show how acetylating specific lysine residues reduced histone-DNA interactions. When I displayed our key finding—the acetylated nucleosome's broader radius of gyration distribution compared to the compact wild-type. I saw audience members nodding in understanding. This moment validated the months I'd spent troubleshooting simulations and refining analyses.

The capstone was an amazing experience. Faculty members as well as fellow students asked insightful questions about connecting our simulations to biological systems and about the therapeutic implications for cancer. I found myself synthesizing information from papers I'd read months earlier, realizing how deeply this project had shaped my scientific thinking. What surprised me most was my own transformation throughout this journey.




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