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Natarajan P, Chuskit D, Priya, Manjeet. 9,10‐Phenanthrenedione‐Catalyzed, Visible‐Light‐Promoted Radical Intramolecular Cyclization of N‐Biarylglycine Esters: One‐Pot synthesis of Phenanthridine‐6‐Carboxylates. ChemistrySelect 2021. [DOI: 10.1002/slct.202103001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Palani Natarajan
- Department of Chemistry & Centre for Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Deachen Chuskit
- Department of Chemistry & Centre for Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Priya
- Department of Chemistry & Centre for Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Manjeet
- Department of Chemistry Guru Jambheshwar University of Science and Technology Hisar Haryana India
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Chakraborty N, Banik S, Chakraborty A, Bhattacharya SK, Das S. Synthesis of a novel pyrene derived perimidine and exploration of its aggregation induced emission, aqueous copper ion sensing, effective antioxidant and BSA interaction properties. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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The effects of rooibos (Aspalathus linearis) on 3T3-L1 preadipocytes after the induction of mitochondrial dysfunction. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Chakraborty N, Bhuiya S, Chakraborty A, Mandal D, Das S. Synthesis and photophysical investigation of 2-hydroxyquinoline-3-carbaldehyde: AIEE phenomenon, fluoride optical sensing and BSA interaction study. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.03.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Pradhan AB, Bhuiya S, Haque L, Das S. Role of hydroxyl groups in the B-ring of flavonoids in stabilization of the Hoogsteen paired third strand of Poly(U).Poly(A)*Poly(U) triplex. Arch Biochem Biophys 2017; 637:9-20. [PMID: 29162368 DOI: 10.1016/j.abb.2017.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/10/2017] [Accepted: 11/15/2017] [Indexed: 12/12/2022]
Abstract
We have reported the interaction of two flavonoids namely quercetin (Q) and morin (M) with double stranded poly(A).poly(U) (herein after A.U) and triple stranded poly(U).poly(A)*poly(U) (herein after U.A*U, dot represents the Watson-Crick and asterisk represents Hoogsteen base pairing respectively) in this article. It has been observed that relative positions of hydroxyl groups on the B-ring of the flavonoids affect the stabilization of RNA. The double strand as well as the triple strand of RNA-polymers become more stabilized in presence of Q, however both the duplex and triplex remain unaffected in presence of M. The presence of catechol moiety on the B-ring of Q is supposed to be responsible for the stabilization. Moreover, after exploiting a series of biophysical experiments, it has been found that, triple helical RNA becomes more stabilized over its parent duplex in presence of Q. Fluorescence quenching, viscosity measurement and helix melting results establish the fact that Q binds with both forms of RNA through the mode of intercalation while M does not bind at all to either forms of RNA.
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Affiliation(s)
- Ankur Bikash Pradhan
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Sutanwi Bhuiya
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Lucy Haque
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Suman Das
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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Guhathakurta B, Pradhan AB, Das S, Bandyopadhyay N, Lu L, Zhu M, Naskar JP. Spectroscopic and molecular docking studies on the interaction of human serum albumin with copper(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:740-748. [PMID: 27792986 DOI: 10.1016/j.saa.2016.10.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 10/20/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Abstract
Two osazone based ligands, butane-2,3-dione bis(2'-pyridylhydrazone) (BDBPH) and hexane-3,4-dione bis(2'-pyridylhydrazone) (HDBPH), were synthesized out of the 2:1M Schiff base condensation of 2-hydrazino pyridine respectively with 2,3-butanedione and 3,4-hexanedione. The X-ray crystal structures of both the ligands have been determined. The copper(II) complex of HDBPH has also been synthesized and structurally characterized. HDBPH and its copper(II) complex have thoroughly been characterized through various spectroscopic and analytical techniques. The X-ray crystal structure of the copper complex of HDBPH shows that it is a monomeric Cu(II) complex having 'N4O2' co-ordination chromophore. Interaction of human serum albumin (HSA) with these ligands and their monomeric copper(II) complexes have been studied by various spectroscopic means. The experimental findings show that the ligands as well as their copper complexes are good HSA binders. Molecular docking investigations have also been done to unravel the mode of binding of the species with HSA.
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Affiliation(s)
| | | | - Suman Das
- Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | | | - Liping Lu
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, People's Republic of China
| | - Miaoli Zhu
- Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, People's Republic of China
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Pradhan AB, Bhuiya S, Haque L, Tiwari R, Das S. Micelle assisted structural conversion with fluorescence modulation of benzophenanthridine alkaloids. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 170:89-96. [PMID: 27419642 DOI: 10.1016/j.saa.2016.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 06/06/2023]
Abstract
In this study we have reported the anionic surfactant (Sodium dodecyl sulfate, SDS) driven structural conversion of two benzophenanthridine plant alkaloids namely Chelerythrine (herein after CHL) and Sanguinarine (herein after SANG). Both the alkaloids exist in two forms: the charged iminium and the neutral alkanolamine form. The iminium form is stable at low pH (<6.5) and the alkanolamine form exists at higher pH (>10.1). The fluorescence intensity of the alkanolamine form is much stronger than the iminium form. The iminium form of both the alkaloids remains stable whereas the alkanolamine form gets converted to the iminium form in the SDS micelle environment. The iminium form possesses positive charge and it seems that electrostatic interaction between the positively charged iminium and negatively charged surfactant leads to the stabilization of the iminium form in the Stern layer of the anionic micelle. Whereas the conversion of the alkanolamine form into the iminium form takes place and that can be monitored in naked eye since the iminium form is orange in colour and the alkanolamine form has blue violet emission. Such a detail insight about the photophysical properties of the benzophenanthridine alkaloids would be a valuable addition in the field of alkaloid-surfactant interaction.
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Affiliation(s)
- Ankur Bikash Pradhan
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Sutanwi Bhuiya
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Lucy Haque
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Richa Tiwari
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Suman Das
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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Pradhan AB, Bhuiya S, Haque L, Das S. Spectroscopic study on the binding of chelerythrine with duplex poly (rA): A model of RNA intercalation. Int J Biol Macromol 2016; 95:340-347. [PMID: 27884672 DOI: 10.1016/j.ijbiomac.2016.11.073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 10/20/2022]
Abstract
Here we have reported a detail study on the interaction of the benzophenanthridine alkaloid chelerythrine (CHL) with double stranded polyriboadenylic acid [ds poly (rA)] by exploiting various spectroscopic techniques. The alkaloid shows high binding affinity (binding constant is 1.10×105M-1) towards the double stranded RNA as revealed from Scatchard plot. The binding was confirmed by hypochromic effect in the UV-vis spectrum of CHL, increase in fluorescence intensity of CHL and perturbations of the circular dichroism (CD) spectrum of ds poly (rA). Later fluorescence quenching, cooperative CD melting transition, viscometric and molecular modeling studies establish the fact that the alkaloid binds to the ds poly (rA) by the mechanism of intercalation. Thermodynamic parameters obtained from the isothermal titration calorimetric (ITC) study show that the binding is favoured by negative enthalpy and small positive entropy changes. This report may be a model for intercalation of small molecule like CHL to the double stranded RNA.
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Affiliation(s)
- Ankur Bikash Pradhan
- Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Sutanwi Bhuiya
- Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Lucy Haque
- Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Suman Das
- Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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Ray B, Agarwal S, Kadian H, Gambhir K, Sharma P, Mehrotra R. Deciphering molecular aspects of interaction between anticancer drug mitoxantrone and tRNA. J Biomol Struct Dyn 2016; 35:2090-2102. [DOI: 10.1080/07391102.2016.1213185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Bhumika Ray
- Academy of Scientific & Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi 110012, India
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Shweta Agarwal
- Academy of Scientific & Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi 110012, India
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Heena Kadian
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Kaweri Gambhir
- Academy of Scientific & Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi 110012, India
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Parag Sharma
- Academy of Scientific & Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi 110012, India
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Ranjana Mehrotra
- Academy of Scientific & Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus, New Delhi 110012, India
- Quantum Phenomena and Applications, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
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Synthesis, structure, DFT calculations, electrochemistry, fluorescence, DNA binding and molecular docking aspects of a novel oxime based ligand and its palladium(II) complex. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 160:336-46. [DOI: 10.1016/j.jphotobiol.2016.04.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 04/22/2016] [Accepted: 04/26/2016] [Indexed: 11/18/2022]
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An overview on the interaction of phenazinium dye phenosafranine to RNA triple and double helices. Int J Biol Macromol 2016; 86:345-51. [DOI: 10.1016/j.ijbiomac.2016.01.078] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/15/2016] [Accepted: 01/21/2016] [Indexed: 12/22/2022]
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Pradhan AB, Haque L, Roy S, Das S. Binding of phenazinium dye safranin T to polyriboadenylic acid: spectroscopic and thermodynamic study. PLoS One 2014; 9:e87992. [PMID: 24498422 PMCID: PMC3912202 DOI: 10.1371/journal.pone.0087992] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 01/02/2014] [Indexed: 11/18/2022] Open
Abstract
Here, we report results from experiments designed to explore the association of the phenazinium dye safranin T (ST, 3,7-diamino-2,8-dimethyl-5-phenylphenazinium chloride) with single and double stranded form of polyriboadenylic acid (hereafter poly-A) using several spectroscopic techniques. We demonstrate that the dye binds to single stranded polyriboadenylic acid (hereafter ss poly-A) with high affinity while it does not interact at all with the double stranded (ds) form of the polynucleotide. Fluorescence and absorption spectral studies reveal the molecular aspects of binding of ST to single stranded form of the polynucleotide. This observation is also supported by the circular dichroism study. Thermodynamic data obtained from temperature dependence of binding constant reveals that association is driven by negative enthalpy change and opposed by negative entropy change. Ferrocyanide quenching studies have shown intercalative binding of ST to ss poly-A. Experiments on viscosity measurements confirm the binding mode of the dye to be intercalative. The effect of [Na⁺] ion concentration on the binding process suggests the role of electrostatic forces in the complexation. Present studies reveal the utility of the dye in probing nucleic acid structure.
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Affiliation(s)
| | - Lucy Haque
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
| | - Snigdha Roy
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
| | - Suman Das
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
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Pradhan AB, Haque L, Bhuiya S, Das S. Induction of self-structure in polyriboadenylic acid by the benzophenanthridine plant alkaloid chelerythrine: a spectroscopic approach. RSC Adv 2014. [DOI: 10.1039/c4ra07075e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Induction of self-structure in polyriboadenylic acid by chelerythrine.
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Affiliation(s)
| | - Lucy Haque
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Sutanwi Bhuiya
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Suman Das
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
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