• M Roychoudhury

      Articles written in Journal of Biosciences

    • Quantum mechanical studies on the activity of anticancerous drug — Ellipticine

      Nitish K Sanyal M RoyChoudhury S N Tiwari

      More Details Abstract Fulltext PDF

      Ellipticine compounds, derivatives of pyrido-(4-3b) carbazole are used in the human cancer therapy. Most of these drugs interact directly with DNA molecule. CNDO method, alongwith second order perturbation theory and multicentered-multipole approxiation have been used to compute intermolecular interaction energies of ellipticine with DNA ase pairs (GC and AT) in both normal and inverted cases. An attempt has been made to correlate the drug-nucleic acid interactions for ellipticine to locate site of drug action and binding pattern on the basis of intermolecular forces

    • Interaction energy studies on pyrazolopyrimidine nucleoside antibiotics — A theoretical study: Oxoformycin B

      Rajendra Prasad Ojha M Roychoudhury Nitish K Sanyal

      More Details Abstract Fulltext PDF

      The biological activity of oxoformycin B has been exafned on the basis of the model developed for the incorporation of nucleoside analogues during transcription. Claverie’s simplified formula has been employed for intermolecular interaction energy calculation. The pairing energy of oxoformycin B base with complementary bases as well as the association energy with nucleic acid base pairs have been calculated. The results are compared with those of similar computation with normal bases. In addition to the in-plane interaction the vertical interaction energy between the analogue and the normal bases has been computed to specify the particular position of the analogue in the chain. On the basis of the model an attempt has been made to explain the mechanism of the biological action of oxoformycin B and to compare the biological activity of pyrazolopyrimidine nucleoside analogues.

  • Journal of Biosciences | News

      Forthcoming Special issue.

    • To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".

      Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.

      Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.

      Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx

      Posted on April 12, 2023
    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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