The phosphatidylserine flippase beta-subunit Tmem30a is essential for normal insulin maturation and secretion

	The phosphatidylserine flippase beta-subunit Tmem30a is essential for normal insulin maturation and secretion
	Yang, Yeming; Sun, Kuanxiang; Liu, Wenjing; Li, Xiao; Tian, Wanli; Shuai, Ping; Zhu, Xianjun
刊名	MOLECULAR THERAPY
	2021
卷号	29 期号:9
英文摘要	The processing, maturation, and secretion of insulin are under precise regulation, and dysregulation causes profound defects in glucose handling, leading to diabetes. Tmem30a is the b subunit of the phosphatidylserine (PS) flippase, which maintains the membrane asymmetric distribution of PS. Tmem30a regulates cell survival and the localization of subcellular structures and is thus critical to the normal function of multiple physiological systems. Here, we show that conditional knockout of Tmem30a specifically in pancreatic islet b cells leads to obesity, hyperglycemia, glucose intolerance, hyperinsulinemia, and insulin resistance in mice, due to insufficient insulin release. Moreover, we reveal that Tmem30a plays an essential role in clathrin-mediated vesicle transport between the trans Golgi network (TGN) and the plasma membrane (PM), which comprises immature secretory granule (ISG) budding at the TGN. We also find that Tmem30a deficiency impairs clathrin-mediated vesicle budding and thus blocks both insulin maturation in ISGs and the transport of glucose-sensing Glut2 to the PM. Collectively, these disruptions compromise both insulin secretion and glucose sensitivity, thus contributing to impairments in glucose-stimulated insulin secretion. Taken together, our data demonstrate an important role of Tmem30a in insulin maturation and glucose metabolic homeostasis and suggest the importance of membrane phospholipid distribution in metabolic disorders.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/60729]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yang, Yeming,Sun, Kuanxiang,Liu, Wenjing,et al. The phosphatidylserine flippase beta-subunit Tmem30a is essential for normal insulin maturation and secretion[J]. MOLECULAR THERAPY,2021,29(9).
APA	Yang, Yeming.,Sun, Kuanxiang.,Liu, Wenjing.,Li, Xiao.,Tian, Wanli.,...&Zhu, Xianjun.(2021).The phosphatidylserine flippase beta-subunit Tmem30a is essential for normal insulin maturation and secretion.MOLECULAR THERAPY,29(9).
MLA	Yang, Yeming,et al."The phosphatidylserine flippase beta-subunit Tmem30a is essential for normal insulin maturation and secretion".MOLECULAR THERAPY 29.9(2021).