Abstract
Family with sequence similarity 134, Member B (FAM134B), is a cis-Golgi transmembrane protein that is known to be necessary for the long-term survival of nociceptive and autonomic ganglion neurons. Recent work has shown that FAM134B plays a pivotal role in autophagy-mediated turnover of endoplasmic reticulum (ER) membranes, tumor inhibition and lipid homeostasis. In this study, we provide mechanistic links between FAM134B and ARF-related protein 1 (ARFRP1) and further show that FAM134B resides in the Golgi apparatus. Here, we found that FAM134B increased lipid accumulation in adipocytes. Transport vehicle number and ADP-ribosylation factor (ARF) family gene expression were also increased by FAM134B overexpression, suggesting that vesicular transport activity enhanced lipid accumulation. ARF-related protein 1 (ARFRP1) is a GTPase that promotes protein trafficking. We show that FAM134B regulates the expression of ARFRP1, and the knockdown of ARFRP1 abolishes enhancement on lipid accumulation caused by FAM134B. In addition, FAM134B upregulates the PAT family protein (PAT), which associates with the lipid droplets (LDs) surface and promotes lipolysis by recruiting adipocyte triglyceride lipase (ATGL). These findings indicate that FAM134B promotes lipid accumulation and adipogenic differentiation by increasing vesicle transport activity in the Golgi apparatus and inhibiting the lipolysis of LDs.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 31372320
Funding statement: This work was financially supported by National Natural Science Foundation of China, Funder Id: 10.13039/501100001809 (grant no. 31372320) and National Basic Research Program of China (grant no. 2012CB124705).
Conflict of interest statement: The authors declare no conflicts of interest.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Reviews
- The role of the innate immune system on pulmonary infections
- The structural biology of the shelterin complex
- Minireviews
- Switchable inteins for conditional protein splicing
- Shining light on plant hormones with genetically encoded biosensors
- Research Articles/Short Communications
- Protein Structure and Function
- A novel method for site-specific chemical SUMOylation: SUMOylation of Hsp90 modulates co-chaperone binding in vitro
- Interplay between reversible phosphorylation and irreversible ADP-ribosylation of eukaryotic translation elongation factor 2
- Refolding and in vitro characterization of human papillomavirus 16 minor capsid protein L2
- Membranes, Lipids, Glycobiology
- FAM134B promotes adipogenesis by increasing vesicular activity in porcine and 3T3-L1 adipocytes
- Cell Biology and Signaling
- MiR-128/SOX7 alleviates myocardial ischemia injury by regulating IL-33/sST2 in acute myocardial infarction
- SIAH1/ZEB1/IL-6 axis is involved in doxorubicin (Dox) resistance of osteosarcoma cells
- Synthetic biology of B cell activation: understanding signal amplification at the B cell antigen receptor using a rebuilding approach
Articles in the same Issue
- Frontmatter
- Reviews
- The role of the innate immune system on pulmonary infections
- The structural biology of the shelterin complex
- Minireviews
- Switchable inteins for conditional protein splicing
- Shining light on plant hormones with genetically encoded biosensors
- Research Articles/Short Communications
- Protein Structure and Function
- A novel method for site-specific chemical SUMOylation: SUMOylation of Hsp90 modulates co-chaperone binding in vitro
- Interplay between reversible phosphorylation and irreversible ADP-ribosylation of eukaryotic translation elongation factor 2
- Refolding and in vitro characterization of human papillomavirus 16 minor capsid protein L2
- Membranes, Lipids, Glycobiology
- FAM134B promotes adipogenesis by increasing vesicular activity in porcine and 3T3-L1 adipocytes
- Cell Biology and Signaling
- MiR-128/SOX7 alleviates myocardial ischemia injury by regulating IL-33/sST2 in acute myocardial infarction
- SIAH1/ZEB1/IL-6 axis is involved in doxorubicin (Dox) resistance of osteosarcoma cells
- Synthetic biology of B cell activation: understanding signal amplification at the B cell antigen receptor using a rebuilding approach