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Title: DNA minor groove binding of a well known anti-mycobacterial drug dapsone: A spectroscopic, viscometric and molecular docking study
Authors: Chakraborty A.
Panda A.K.
Ghosh R.
Biswas A.
Keywords: Dapsone
Drug-DNA interaction
Groove binding
Molecular docking
Issue Date: 2019
Citation: 2
Abstract: Dapsone is a sulfone drug mainly used as anti-microbial and anti-inflammatory agent for the treatment of various diseases including leprosy. Recently, its interaction with protein (bovine serum albumin) is evidenced. But, the binding propensity of this anti-mycobacterial drug towards DNA is still unknown. Also, the mode of dapsone-DNA interaction (if any) is still an unknown quantity. In this study, we have taken a thorough attempt to understand these two unknown aspects using various biophysical and in silico molecular docking techniques. Both UV�visible and fluorescence titrimetric studies indicated that dapsone binds to CT-DNA with a binding constant in order of 10 4 M ?1 . Circular dichroism, thermal denaturation and viscosity experiments revealed that dapsone binds to the grooves of CT-DNA. Competitive DNA binding studies clearly indicated the minor groove binding property of this anti-mycobacterial drug. Molecular docking provided detailed information about the formation of hydrogen bonding in the dapsone-DNA complex. This in silico study further revealed that dapsone binds to the AT-rich region of the minor groove of DNA having a relative binding energy of ?6.22 kcal mol ?1 . Overall, all these findings evolved from this study can be used for better understanding the medicinal importance of dapsone. � 2019 Elsevier Inc.
Appears in Collections:Research Publications

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