Interaction Study of 2,6-Bis[4-(4-amino-2-trifluoromethyl phenoxy)benzoyl] Pyridine with H

Interaction Study of 2,6-Bis[4-(4-amino-2-trifluoromethyl phenoxy)benzoyl] Pyridine with Human Immunoglobulin by Optical Spectroscopy

and Molecular Modeling

HE Wenying;ZHANG Qiongmei;GAO Wenhua ;DONG Yuming ;YAO Xiaojun

【期刊名称】《中国化学（英文版）》 【年(卷),期】2009(027)002

【摘要】The interaction between human immunoglobulin (HIgG) and BAFP (2,6-bis[4-(4-amino-2-trifluoromethyl phenoxy)benzoyl] pyridine was studied by fluorescence quenching, Fourier transform infrared (FT-IR) spectra and molecule modeling. The synchronous fluorescence spectra indicated the information on qualitative changes of the pro-tein secondary structure in the presence of BAFP in aqueous solution. The quantitative alterations of the protein sec-ondary structure were estimated by the evidences from FT-IR spectra with increases of α helices by about 2.6%-10.2%, increases of β-sheet structure by about 13.6%-27.7%, and reductions of β-turn structure by about 23.8%-30.3%. Molecular docking suggests that BAFP can strongly bind to HIgG. There are four hydrogen bond interac-tions between the drug and the residues Trp 170, Val 105, Met 139 and Asn 52. It was also considered that BAFP bound to HIgG mainly by a hydrophobic interaction, which is in good agreement with the results from the experi-mental

thermodynamic parameters (the enthalpy change △Hθ and the entropy change △Sθ were calculated to be-6.70 kJ·mol-1 and 71.93 J·mol-1·K-1,respectively, according to the Van't Holf equation). 【总页数】7页(324-330) 【关键词】

【作者】HE Wenying;ZHANG Qiongmei;GAO Wenhua ;DONG Yuming ;YAO Xiaojun

【作者单位】Department University,Haikou,Hainan Chemistry,Hainan

571158,China;Department University,Shantou,Guangdong

of

Chemistry,Hainan

Normal

of

571158,China;Department Normal

of

University,Haikou,Hainan

Chemistry,Shantou

of

515063,China;Department

Chemistry,Lanzhou University,Lanzhou,Gansu 730000,China;Department of Chemistry,Lanzhou University,Lanzhou,Gansu 730000,China 【正文语种】中文 【中图分类】O6 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_chinese-journal-chemistry_thesis/0201251282600.html 【相关文献】

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