Abstract：
:Lipid droplet (LD), a multi-functional organelle, is often found to associate with other cellular membranous structures and vary in size in a given cell, which may be related to their functional diversity. Here we established a method to separate LD subpopulations from isolated CHO K2 LDs into three different size categories. The subpopulation with smallest LDs was nearly free of ER and other membranous structures while those with larger LDs contained intact ER. These distinct subpopulations of LDs differed in their protein composition and ability to recruit proteins. This method was also applicable to LDs obtained from other sources, such as Huh7 cells, mouse liver and brown adipose tissue, et al. We developed an in vitro assay requiring only isolated LDs, Coenzyme A, and ATP to drive lipid synthesis. The LD subpopulation nearly depleted of ER was able to incorporate fatty acids into triacylglycerol and phospholipids. Together, our data demonstrate that LDs in a given cell are heterogeneous in size and function, and suggest that LDs are one of cellular lipid synthetic organelles.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhang S,Wang Y,Cui L,Deng Y,Xu S,Yu J,Cichello S,Serrero G,Ying Y,Liu Pdoi
10.1038/srep29539subject
Has Abstractpub_date
2016-07-08 00:00:00pages
29539issn
2045-2322pii
srep29539journal_volume
6pub_type
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