کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3001683 | 1180658 | 2013 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The human lipodystrophy protein seipin is an ER membrane adaptor for the adipogenic PA phosphatase lipin 1 The human lipodystrophy protein seipin is an ER membrane adaptor for the adipogenic PA phosphatase lipin 1](/preview/png/3001683.png)
Disruption of the gene BSCL2 causes a severe, generalised lipodystrophy, demonstrating the critical role of its protein product, seipin, in human adipose tissue development. Seipin is essential for adipocyte differentiation, whilst the study of seipin in non-adipose cells has suggested a role in lipid droplet formation. However, its precise molecular function remains poorly understood. Here we demonstrate that seipin can inducibly bind lipin 1, a phosphatidic acid (PA) phosphatase important for lipid synthesis and adipogenesis. Knockdown of seipin during early adipogenesis decreases the association of lipin 1 with membranes and increases the accumulation of its substrate PA. Conversely, PA levels are reduced in differentiating cells by overexpression of wild-type seipin but not by expression of a mutated seipin that is unable to bind lipin 1. Together our data identify lipin as the first example of a seipin-interacting protein and reveals a novel molecular function for seipin in developing adipocytes.
Journal: Molecular Metabolism - Volume 2, Issue 1, February 2013, Pages 38–46