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Updated: May 27, 2025

Detection of Heterodimerization of Protein Isoforms Using an in Situ Proximity Ligation Assay
Published on: October 20, 2018
Discovery of Chirally-dependent Protein O-2-Hydroxyglutarylation by D2HG and L2HG
Zheng Zhang1, Yi-Kai Liu1, Zhuojun Luo1
1Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA.
Abstract:
Mutations in isocitrate dehydrogenase 1 (IDH1) and IDH2 are common in multiple types of human cancer, leading to the accumulation of D-2-hydroxyglutarate (D2HG) and the promotion of tumorigenesis1. Here we discovered a novel O-2-hydroxyglutarylation by D2HG using chemical proteomics and further revealed distinct chiral preferences for D/L2HG modifications. Notably, we identified two kinases, MRCKA and SLK, modified by D2HG and L2HG respectively, and detected reduced phosphorylation of their substrates, suggesting an inhibitory effect of D/L 2HG modifications on the kinases' activity.
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