A d-2-hydroxyglutarate biosensor based on specific transcriptional regulator DhdR

作者：Dan Xiao, Wen Zhang, Xiaoting Guo, Yidong Liu, Chunxia Hu, Shiting Guo, Zhaoqi Kang, Xianzhi Xu, Cuiqing Ma, Chao Gao, Ping Xu · 发表于：Nature Communications · 年份：2021 · DOI：10.1038/s41467-021-27357-7 · 被引用次数：35 · 研究领域：Amino Acid Enzymes and Metabolism、Chemical Reactions and Isotopes、Enzyme Structure and Function

D-2-Hydroxyglutarate (D-2-HG) is a metabolite involved in many physiological metabolic processes. When D-2-HG is aberrantly accumulated due to mutations in isocitrate dehydrogenase or D-2-HG dehydrogenase, it functions in a pro-oncogenic manner and is thus considered a therapeutic target and biomarker in many cancers. In this study, DhdR from Achromobacter denitrificans NBRC 15125 is identified as an allosteric transcriptional factor that negatively regulates D-2-HG dehydrogenase expression and responds to the presence of D-2-HG. Based on the allosteric effect of DhdR, a D-2-HG biosensor is developed by combining DhdR with amplified luminescent proximity homogeneous assay (AlphaScreen) technology. The biosensor is able to detect D-2-HG in serum, urine, and cell culture medium with high specificity and sensitivity. Additionally, this biosensor is used to identify the role of D-2-HG metabolism in lipopolysaccharide biosynthesis of Pseudomonas aeruginosa, demonstrating its broad usages.