title: Spectroscopic and molecular docking study on the interaction between salicylic acid and the induced disease-resistant protein OsAAA1 of rice.
abstract: The interaction between salicylic acid (SA) and the induced disease-resistant protein OsAAA1 in rice was studied using spectroscopy and molecular docking. Ultraviolet (UV) absorption spectroscopy demonstrated an interaction between OsAAA1 protein and SA. Spectroscopy showed that this interaction was a dynamic quenching process. Synchronous fluorescence spectroscopy (SFS) further revealed that this interaction caused changes in the microenvironment of tyrosine and tryptophan and that the interaction site was closer to the tryptophan residue. The structural model of protein OsAAA1 was determined by homology modeling method, and the molecular docking simulation diagram of OsAAA1 with SA was obtained. These models, in combination with a Ramachandran plot analysis, showed amino acid residues ranging from position 240 to position 420 as the possible site interacting with SA. Among them, Gly389, Lys257 and Glu425 might be three key amino acids that can form hydrogen bonds with SA.
authors.affiliation: Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, College of Life Science, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Ya H
authors.initials: YH
authors.lastname: Chen
authors.affiliation: College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Kang
authors.initials: K
authors.lastname: Dai
authors.affiliation: Academy of Agricultural Sciences of Jingzhou, Jingzhou 434000, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, College of Life Science, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Yun H
authors.initials: YH
authors.lastname: Wu
authors.affiliation: Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, College of Life Science, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Chun T
authors.initials: CT
authors.lastname: Wang
authors.affiliation: Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, College of Life Science, South-Central University for Nationalities, Wuhan 430074, China.
authors.forename: Xue Q
authors.initials: XQ
authors.lastname: Liu
authors.affiliation: Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, College of Life Science, South-Central University for Nationalities, Wuhan 430074, China. Electronic address: liuxinqiong@mail.scuec.edu.cn.
authors.forename: Xin Q
authors.initials: XQ
authors.lastname: Liu
mesh_terms: D062105:Molecular Docking Simulation; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism; D010940:Plant Proteins / Q000737:chemistry* / Q000378:metabolism; D020156:Salicylic Acid / Q000737:chemistry* / Q000378:metabolism; D013050:Spectrometry, Fluorescence
chemical_list: D010940:Plant Proteins; D020156:Salicylic Acid
keywords: Induced disease-resistant gene OsAAA1; Molecular docking; Salicylic acid; Spectroscopy