PMID- 24446377 OWN - NLM STAT- MEDLINE DCOM- 20140902 LR - 20140121 IS - 1099-1352 (Electronic) IS - 0952-3499 (Linking) VI - 27 IP - 3 DP - 2014 Mar TI - Spectroscopic studies on the interaction mechanisms of safranin T with herring sperm DNA using acridine orange as a fluorescence probe. PG - 131-7 LID - 10.1002/jmr.2341 [doi] AB - Under the condition of physiological pH environment (pH = 7.40), the interactions of safranin T (ST) with herring sperm DNA were studied by means of spectral methods using acridine orange (AO) as a fluorescence probe. The spectroscopic characteristics of DNA-AO in the case of ST (along with the increase of concentration) were observed in an aqueous medium. The binding constants for ST stranded DNA and competitive bindings of ST interacting with DNA-AO systems were examined by fluorescence spectra, and the binding mechanism of ST with DNA was researched via viscosity measurements. All the testimony manifested that bonding modes between ST and DNA were evidenced to be intercalative binding and electrostatic binding, and the combining constant of ST with DNA was obtained. The binding of ST to DNA was driven by entropy and enthalpy through the calculated thermodynamic parameters (Deltar Hm (Ө), Deltar Sm and Deltar Gm (Ө)). CI - Copyright (c) 2014 John Wiley & Sons, Ltd. FAU - Long, Jun AU - Long J AD - School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China. FAU - Wang, Xing-ming AU - Wang XM FAU - Xu, Dong-ling AU - Xu DL FAU - Ding, Li-sheng AU - Ding LS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Mol Recognit JT - Journal of molecular recognition : JMR JID - 9004580 RN - 0 (Antineoplastic Agents) RN - 0 (Fluorescent Dyes) RN - 0 (Intercalating Agents) RN - 0 (Phenazines) RN - 0 (Solutions) RN - 9007-49-2 (DNA) RN - F30N4O6XVV (Acridine Orange) RN - XTX0YXU2HV (safranine T) SB - IM MH - Acridine Orange/*chemistry MH - Animals MH - Antineoplastic Agents/*chemistry MH - Binding, Competitive MH - DNA/*chemistry/isolation & purification MH - Fishes MH - Fluorescent Dyes/*chemistry MH - Hydrogen-Ion Concentration MH - Intercalating Agents/*chemistry MH - Kinetics MH - Male MH - Phenazines/*chemistry MH - Solutions MH - Spectrometry, Fluorescence MH - Spectrophotometry, Ultraviolet MH - Spermatozoa/chemistry MH - Static Electricity MH - Thermodynamics OTO - NOTNLM OT - DNA OT - acridine orange OT - fluorescence spectra OT - interaction OT - safranin T EDAT- 2014/01/22 06:00 MHDA- 2014/09/03 06:00 CRDT- 2014/01/22 06:00 PHST- 2013/09/16 00:00 [received] PHST- 2013/11/01 00:00 [revised] PHST- 2013/11/13 00:00 [accepted] PHST- 2014/01/22 06:00 [entrez] PHST- 2014/01/22 06:00 [pubmed] PHST- 2014/09/03 06:00 [medline] AID - 10.1002/jmr.2341 [doi] PST - ppublish SO - J Mol Recognit. 2014 Mar;27(3):131-7. doi: 10.1002/jmr.2341.