Hazra Lab

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Riya Karan

Riya Karan

phd

Fellowship: MHRD

Biography

PhD Scholar at IIT Roorkee

Antimicrobial resistance (AMR) has become a formidable global health crisis, with the escalating threat of antibiotic resistance primarily driven by the spread of beta-lactamases. A striking example is KPC (Klebsiella pneumoniae carbapenemase), first identified in drug-resistant Klebsiella pneumoniae, which possesses the alarming ability to cleave nearly all beta-lactams, including combinational beta-lactams and beta-lactamase inhibitors, due to active-site insertions, including Ceftazidime-Avibactam. To unravel the mechanistic intricacies of these enzymes, we aim to conduct a comprehensive study using macromolecular crystallography, biophysical, biochemical, biological, and MD simulation methods.

Academic Background

2021-Present PhD Scholar at IIT Roorkee

2019-2021 M.Sc at Midnapore College Autonomous, Midnapore, West Bengal

2016-2019 B.Sc at Midnapore College Autonomous, Midnapore, West Bengal

Selected Publications

  1. Karan R, Dhankhar K, Singh A, Panda SK, Sen T, Sen Gupta PS, Hazra S. Decoding Ceftazidime-Avibactam Resistance in Newly Identified Klebsiella pneumoniae Carbapenemase (KPC) 107 Variant by Modulating the Active Site Environment. ACS Infectious Diseases. 2025 Dec 19. https://doi.org/10.1021/acsinfecdis.5c00288
  2. Karan R, Pyne A, Panda SK, Sen Gupta PS, Hazra S. Mechanistic insights into ESBL activity of subclass A2 in Class A beta-lactamase revealing a distinct strategy towards conferring drug resistance. Journal of Biomolecular Structure and Dynamics. 2025 Sep 19:1-22. https://doi.org/10.1080/07391102.2025.2563080
  3. Baidya, S., Dhankhar, K., Karan, R., Hazra, M., Adhikary, R., Sen, T., & Hazra, S. Structural and functional characterization of an active site‐influencing variant (IMP‐1‐F218Y) in IMP‐1 metallo‐β‐lactamase. The FEBS Journal. https://doi.org/10.1111/febs.70474

Posters & Conferences

  1. 49th & 50th National Seminars on Crystallography (2022, 2023)
  2. National Conference on Antimicrobial Resistance at SRHU, Dehradun (2024)
  3. Sagamore XX at Shiv Nadar University, Noida, Delhi (2024)
  4. Global Scientific Conference at Indian Institute of Technology Bombay (2025)
  5. ICABSB at Indian Institute of Technology Roorkee (2025)
  6. International Conference on Superbug Summit at Chanakya University, Bengaluru (2026)