Impact of pyrrolidine-bispyrrole DNA minor groove binding agents and chirality on global proteomic profile in Escherichia Coli

doi:10.1186/1477-5956-11-23

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標題:	Impact of pyrrolidine-bispyrrole DNA minor groove binding agents and chirality on global proteomic profile in Escherichia Coli
作者:	Yang, Ya-ting Lin, Chun-Yu Jeng, Jingyueh Ong, Chi-Wi
貢獻者:	生物科技系
關鍵字:	Escherichia Coli Pyrrolidine-Bispyrroles Proteomics Chirality Matrix-Assisted Laser Desorption/Ionization (Time Of Flight) Protein Up- And Down-Regulation
日期:	2013-05
上傳時間:	2014-05-26 10:46:34 (UTC+8)
出版者:	Biomed Central Ltd
摘要:	Background: There is great interest in the design of small molecules that selectively target minor grooves of duplex DNA for controlling specific gene expression implicated in a disease. The design of chiral small molecules for rational drug design has attracted increasing attention due to the chirality of DNA. Yet, there is limited research on the chirality effect of minor groove binders on DNA interaction, especially at the protein expression level. This paper is an attempt to illustrate that DNA binding affinity might not provide a full picture on the biological activities. Drug interacting at the genomic level can be translated to the proteomic level. Here we have illustrated that although the chiral bispyrrole-pyrrolidine-oligoamides, PySSPy and PyRSPy, showed low binding affinity to DNA, their influence at the proteomic level is significant. More importantly, the chirality also plays a role. Two-dimensional proteomic profile to identify the differentially expressed protein in Escherichia coli DH5a (E coli DH5 alpha) were investigated.Results: E coli DH5 alpha incubated with the chiral PySSPy and PyRSPy, diastereomeric at the pyrrolidine ring, showed differential expression of eighteen proteins as observed through two dimensional proteomic profiling. These eighteen proteins identified by MALDI_TOF/TOF MS include antioxidant defense, DNA protection, protein synthesis, chaperone, and stress response proteins. No statistically significant toxicity was observed at the tested drug concentrations as measured via MTT assay.Conclusion: The current results showed that the chiral PySSPy and PyRSPy impact on the proteomic profiling of E coli DH5 alpha, implicating the importance of drug chirality on biological activities at the molecular level.
關聯:	Proteome Science, v.11 n.23
顯示於類別:	[生物科技系(所)] 期刊論文

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