Donghyuk obtained his Master and PhD degrees in department of biological sciences, Sungkyunkwan University, South Korea. During his PhD research, he revealed the site-specific mono-ubiquitination of Rab5 and its physiological functions under the supervision of Prof. Sangho Lee. He also tried to understand structure of linear ubiquitin chains by combining X-ray crystallography and small angle X-ray scattering. After obtained his PhD in Aug. 2017, he moved to Frankfurt and joined the Dikic’s lab as a postdoc since Nov. 2017. He is currently trying to understand the structure and function of various proteins related to phosphoribose dependent ubiquitination.