Dr Suman Mandal
BSc, MSc, PhD
Expertise
Specialize in structural biology and protein engineering. Integrating high-resolution X-ray crystallography with computational modeling. Focus on redesigning proteins for drug discovery and biocatalysis.
Current positions
Research Associate
School of Chemistry
Contact
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Biography
Dr. Mandal’s expertise is rooted in a rigorous academic background in chemistry and crystallography. He earned his Ph.D. from Shiv Nadar University, India, where his thesis focused on quantifying hydrogen bonds and interaction energies using quantum crystallographic approaches to predict potent ligands. This foundational work in small molecule interaction energetics evolved into macromolecular studies during his tenure in the Protein Design Lab at Bristol, where he mastered Golden Gate Assembly and protein splicing to synthesize complex repeat proteins.
Beyond his research, Dr. Mandal has worked as a Technical Officer managing SC-XRD and thermal analysis facilities.
Research interests
My research portfolio integrates structural biology, protein engineering, and computational chemistry to address complex biochemical challenges. Currently, as a Research Associate at the University of Bristol, I lead projects focused on engineering horseradish peroxidase (HRP) to enhance its expression and stability in E. coli. For this we re-engineered the HRP sequence using computational tools and testing the predicted sequences in the lab to establish the expression and stability. This involves utilizing rigorous molecular biology techniques and precise biophysical characterization of the modified HRP sequences. I am also working on the understanding of heme peroxidase catalytic cycles by crystallizing reaction intermediates of Cytochrome C, Horseradish peroxidase and Ascorbate peroxidases, utilizing X-ray Free-Electron Lasers (XFEL) and Diffraction data.
Previously, I specialized in synthetic biology, where I designed and synthesized large Designed Helical Repeat (DHR) proteins. Utilizing Golden Gate Assembly and split-inteins, I developed methods for creating covalent protein assemblies. These macromolecular structures were characterized using Small Angle X-ray Scattering (SAXS), alongside other biophysical techniques.
My research foundation was established during my doctoral studies in quantum crystallography and computer-aided drug design (CADD). My thesis work focused on the quantification of hydrogen bonds and interaction energies in proteins. By employing experimental charge density analysis and aspherical refinement methods on X-ray and neutron diffraction data, I developed insights into electrostatic interactions to predict accurate lead structures for ligand screening.
Publications
Recent publications
01/04/2025Crystal structure of ferric recombinant horseradish peroxidase
Journal of Biological Inorganic Chemistry
In silico prediction of heme binding in proteins
Journal of Biological Chemistry
Predicting Accurate Lead Structures for Screening Molecular Libraries: A Quantum Crystallographic Approach
Molecules
Electron density based analysis of N-H⋯OC hydrogen bonds and electrostatic interaction energies in high-resolution secondary protein structures
CrystEngComm
CHAPTER 6: Charge Density Studies and Topological Analysis of Hydrogen Bonds in Proteins
Monographs in Supramolecular Chemistry