
The FAM13A gene has been linked to chronic obstructive pulmonary disease and lung function in genetic studies, but how its protein is regulated is not well understood. Researchers have discovered that the protein is phosphorylated by AKT kinase and then targeted for degradation by the CULLIN4A/DCAF1 E3 ligase complex after exposure to cigarette smoke extract or other acute stressors, leading to reduced levels of FAM13A. This mechanism plays a role in regulating lung epithelial repair after injury, and reduced levels of FAM13A promote accelerated epithelial cell proliferation during the recovery phase. These findings expand our understanding of protein stability regulation and could have implications for the development of lung diseases.
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