Assoc. Prof. Dr. Sandip Kaledhonkar | Drug Discovery and Development | Research Excellence Award

Indian Institute of Technology Bombay | India

Assoc. Prof. Dr. Sandip Kaledhonkar is a distinguished scientist whose work spans biophysics, structural biology, cryo-electron microscopy, and molecular microbiology. He currently serves in the Department of Biosciences and Bioengineering at the Indian Institute of Technology Bombay, where he contributes to cutting-edge research, innovative teaching, and academic mentorship. Prior to his current role, he progressed through key academic and research appointments, including his tenure as Assistant Professor at IIT Bombay, a scientific role at the Haffkine Institute for Training, Research and Testing in Mumbai, and an impactful post-doctoral fellowship at Columbia University Medical Center in New York. These experiences collectively shaped his expertise in structural dynamics, cryo-EM methodologies, and molecular interactions critical to understanding biological systems.Dr. Kaledhonkar earned his Ph.D. in Physics from Oklahoma State University, where he conducted foundational work on the Structural Dynamics of Photoactive Yellow Protein under the guidance of Dr. Aihua Xie. He further strengthened his academic foundation with an M.Sc. and B.Sc. in Physics from the University of Pune. His teaching portfolio reflects his multidisciplinary strengths, covering subjects such as Mathematics for Biologists, Experimental Techniques in Biomedical Engineering, Computational Biology, cryo-Electron Microscopy, and core undergraduate biology.His research contributions have significantly advanced the field, with notable publications including titles such as In Silico Identification of Potential Inhibitors of Mycobacterium tuberculosis DNA Gyrase from Phytoconstituents of Indian Medicinal Plants, Cryo-EM Reconstruction of the phiK601 Jumbo Phage Head, VCP/p97, a Host AAA-ATPase Exhibits Bacteriolytic Activity for Clearance of Microbial Infection, Conformational Flexibility Associated with Remote Residues Regulate the Kinetic Properties of Glutamate Dehydrogenase, and Application of Bio-Layer Interferometry for the Analysis of Ribosome-Protein Interactions. Other influential works include Physiochemical Characterization of a Potential Klebsiella Phage MKP-1, Not All Photoactive Yellow Proteins Are Built Alike, and landmark cryo-EM studies such as Late Steps in Bacterial Translation Initiation Visualized Using Time-Resolved Cryo-EM and Key Intermediates in Ribosome Recycling Visualized by Time-Resolved Cryo-Electron Microscopy. His scholarly record also features important methodological contributions, including Single Particle Cryo-Electron Microscopy and A Fast and Effective Microfluidic Spraying-Plunging Method for High-Resolution Single-Particle Cryo-EM.Dr. Kaledhonkar’s excellence has been recognized through numerous honors, including prestigious microscopy, teaching, and research awards, as well as membership in India’s premier scientific academies. His work continues to influence modern bioscience research, inspiring new advancements in structural biology and biomedical innovation.

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Featured Publications

Feng, X., Fu, Z., Kaledhonkar, S., Jia, Y., Shah, B., Jin, A., Liu, Z., Sun, M., & Chen, B. (2017). A fast and effective microfluidic spraying‑plunging method for high‑resolution single‑particle cryo‑EM. Structure, 25(4), 663‑670.e3.

Chen, B., Kaledhonkar, S., Sun, M., Shen, B., Lu, Z., Barnard, D., & Lu, T. M. (2015). Structural dynamics of ribosome subunit association studied by mixing‑spraying time‑resolved cryogenic electron microscopy. Structure, 23(6), 1097‑1105.

Fu, Z., Indrisiunaite, G., Kaledhonkar, S., Shah, B., Sun, M., & Chen, B. (2019). The structural basis for release factor activation during translation termination revealed by time‑resolved cryogenic electron microscopy. Biophysical Journal, 116(3), 574a‑575a.

Fu, Z., Kaledhonkar, S., Borg, A., Sun, M., Chen, B., Grassucci, R. A., & Ehrenberg, M. (2016). Key intermediates in ribosome recycling visualized by time‑resolved cryoelectron microscopy. Structure, 24(12), 2092‑2101.

Horst, M. A., Stalcup, T. P., Kaledhonkar, S., Kumauchi, M., Hara, M., & Xie, A. (2009). Locked chromophore analogs reveal that photoactive yellow protein regulates biofilm formation in the deep‑sea bacterium Idiomarina loihiensis. Journal of the American Chemical Society, 131(47), 17443‑17451.

Kaledhonkar, S., Fu, Z., White, H., & Frank, J. (2018). Time‑resolved cryo‑electron microscopy using a microfluidic chip. In Protein Complex Assembly: Methods and Protocols (pp. 59‑71).

Kaledhonkar, S., Hara, M., Stalcup, T. P., Xie, A., & Hoff, W. D. (2013). Strong ionic hydrogen bonding causes a spectral isotope effect in photoactive yellow protein. Biophysical Journal, 105(11), 2577‑2585.