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Stem Cell and Regenerative
Biology Graduate Program

김윤기

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Prof Info.

김윤기Kim, Yoon Ki

생명과학기술대학

줄기세포 및 분화연구 조직공학 및 오가노이드

Lab Info.

우리 실험실에서는 진핵세포에서 일어나는 다양한 형태의 유전자 발현 조절, 특히 mRNA 안정성 및 단백질 번역을 통한 유전자 발현 조절의 이해를 목표로 연구를 진행하고 있습니다.
현재 우리 실험실에서는 비정상적인 mRNA를 선택적으로 인식 및 제거하는 nonsense-mediated mRNA decay (NMD) 기전을 포함한 다양한 RNA 제거 기전에 대한 연구를 진행중입니다.
NMD는 줄기세포 분화, 자가포식 등 다양한 생명현상과 직접적으로 관련이 있는 대표적인 mRNA 픔질검증 기전입니다.
또한 NMD는 단백질 번역 기전과 밀접한 관련이 있기 때문에, 진핵세포에서 일어나는 다양한 형태의 단백질 번역기전에 대한 연구를 병행하고 있습니다.
최근에는 RNA 연구분야의 가장 핫이슈 중의 하나인 RNA modification 및 원형 RNA (circular RNA)들과 관련된 분자생물학적 기전 및 생물학적 중요성 규명에 대해 관심을 가지고 연구 중입니다.
이러한 기초연구 뿐만 아니라, 새로운 형태의 RNA 치료제 개발을 위한 다양한 RNA 플랫폼 개발 연구를 진행중입니다. 
Research in my laboratory focuses on the regulation of gene expression via mRNA stability and translation in mammalian cells.
Our present efforts center on the molecular mechanism of nonsense-mediated mRNA decay (NMD), whereby mammalian cells recognize and selectively degrade premature termination codon (PTC)-containing defective transcripts, thus preventing the expression of deleterious truncated proteins.
The NMD pathway is tightly coupled to translation via the nuclear cap-binding protein complex (CBC), a heterodimer composed of cap-binding proteins 80 and 20.
To understand the molecular mechanism underlying the connection between NMD and translation, we are currently working on CBC-mediated translation.
We are also interested in various gene regulatory mechanisms mediated by (i) newly characterized RNAs in mammals, such as circular RNAs and noncoding RNAs, as well as (ii) diverse mRNA modifications, such as m6A, m1A, and m5C

Profile.

  • 2022.8 - 현재 Professor, Dept. of Biological Sciences, KAIST
  • 2024.8 - 현재 Director, Creative Research Initiatives Center for Circular RNA Research
  • 2020.12 - 현재 RiboTech, CEO.
  • 2005.9 - 2022.7 Assistant, associate, and full professor, Division of Life Sciences, Korea University
  • 2002.8 - 2005.8 Post-Doctoral Fellow, Department of Biochemistry and Biophysics, School of Medicine and Dentistry, University of Rochester, New York

Education.

  • 1998.3 - 2002.2 Ph.D. Department of Life Science, POSTECH, Korea
  • 1996.3 - 1998.2 M.S. Department of Life Science, POSTECH, Korea
  • 1991.3 - 1996.2 B.S. Department of Life Science, POSTECH, Korea

Main Research areas.

  • Regulation of RNA stability
  • Molecular mechanism of translation
  • Circular RNAs
  • RNA modifications
  • Regulation of misfolded polypeptides

Main Publications.

  • Jeeyoon Chang, Min-Kyung Shin, Joori Park, Hyun Jung Hwang, Nicolas Locker, Junhak Ahn, Doyeon Kim, Daehyun Baek, Yeonkyoung Park, Yujin Lee, Sung Ho Boo, Hyeong-In Kim, and Yoon Ki Kim (2023.11) An interaction between eIF4A3 and eIF3g drives the internal initiation of translation. Nucleic Acids Research 51(20):10950-10969.
  • Hyun Jung Hwang, Tae Lim Park, Hyeong-In Kim, Yeonkyoung Park, Geunhee Kim, Chiyeol Song, Won-Ki Cho*, and Yoon Ki Kim* (*equal contribution) (2023.10) YTHDF2 facilitates aggresome formation via UPF1 in an m6A-independent manner. Nature Communications 14:6248.
  • Hyun Jung Hwang, Hongseok Ha, Ban Seok Lee, Bong Heon Kim, Hyun Kyu Song, and Yoon Ki Kim. (2022.03) LC3B is an RNA-binding protein to trigger rapid mRNA degradation during autophagy. Nature Communications 13:1436.
  • Joori Park, Jeeyoon Chang, Hyun Jung Hwang, Kwon Jeong, Hyuk-Joon Lee, Hongseok Ha, Yeonkyoung Park, Chunghun Lim, Jae-Sung Woo, Yoon Ki Kim. (2021.12) The pioneer round of translation ensures proper targeting of ER and mitochondrial proteins. Nucleic Acids Research 49(21), 12517-12534.
  • Yeonkyoung Park, Joori Park, Hyun Jung Hwang, Byungju Kim, Kwon Jeong, Jeeyoon Chang, Jong-Bong Lee*, and Yoon Ki Kim* (*, co-corresponding authors) (2020.06) Nonsense-mediated mRNA decay factor UPF1 promotes aggresome formation. Nature Communications 11(1):3106.
  • Ok Hyun Park, Hongseok Ha, Yujin Lee, Sung Ho Boo, Do Hoon Kwon, Hyun Kyu Song, and Yoon Ki Kim (2019.05) Endoribonucleolytic cleavage of m6A-containing RNAs by RNase P/MRP complex. Molecular Cell 74(3):494-507.