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Updated: May 23, 2025

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Published on: September 27, 2024
MLKL as an emerging machinery for modulating organelle dynamics: regulatory mechanisms, pathophysiological
Abstract:
Mixed lineage kinase domain-like protein (MLKL) is a pseudokinase featured by a protein kinase-like domain without catalytic activity. MLKL was originally discovered to be phosphorylated by receptor-interacting protein kinase 1/3, typically increase plasma membrane permeabilization, and disrupt the membrane integrity, ultimately executing necroptosis. Recent evidence uncovers the association of MLKL with diverse cellular organelles, including the mitochondrion, lysosome, endosome, endoplasmic reticulum, and nucleus. Thus, this review mainly focuses on the regulatory functions, mechanisms, and targets of MLKL in organelles rather than necroptosis and summarize the medical significance in multiple diseases. On this basis, we conclude and analyze the current progress and prospect for the development of MLKL-related drugs, from natural products, small-molecule chemical compounds, to proteolysis-targeting chimera. This review is aimed to propel the development of MLKL as a valid drug target and the discovery of novel MLKL-related drugs, and promote their further applications.
Insights
Mixed lineage kinase domain-like protein (MLKL) regulates cellular organelles beyond necroptosis. This review explores MLKL
Area of Science:
- Cellular Biology
- Molecular Mechanisms
- Drug Discovery
Background:
- Mixed lineage kinase domain-like protein (MLKL) is a pseudokinase known for its role in necroptosis.
- Recent studies reveal MLKL's involvement with various cellular organelles, including mitochondria, lysosomes, and the nucleus.
- This contrasts with its established function in plasma membrane permeabilization during necroptosis.
Purpose of the Study:
- To review the regulatory functions, mechanisms, and targets of MLKL within cellular organelles.
- To summarize the medical significance of MLKL in diverse diseases.
- To analyze the current progress and future prospects for MLKL-targeted drug development.
Main Methods:
- Literature review focusing on MLKL's organelle functions.
- Analysis of existing data on MLKL's role in disease pathology.
- Evaluation of therapeutic strategies targeting MLKL.
Main Results:
- MLKL exhibits diverse regulatory roles across multiple cellular organelles.
- MLKL's involvement extends beyond necroptosis to other cellular processes.
- Significant medical implications of MLKL in various diseases are identified.
Conclusions:
- MLKL is a versatile protein with critical functions in cellular organelles.
- Targeting MLKL presents a promising therapeutic avenue for multiple diseases.
- Development of MLKL-specific drugs, including natural products and PROTACs, is advancing.
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