Purification, cellular levels, and functional domains of lipase maturation factor 1.
Purification, cellular levels, and functional domains of lipase maturation factor 1.
复制标题
脂肪酶成熟因子 1 的纯化、细胞水平和功能域。
DOI:
10.1016/j.bbrc.2014.05.136
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发表时间:
2014
影响因子:
3.1
通讯作者:
Neher,SaskiaB
中科院分区:
文献类型:
--
作者:
Babilonia-Rosa,MelissaA;Neher,SaskiaB
Over a third of the US adult population has hypertriglyceridemia, resulting in an increased risk of atherosclerosis, pancreatitis, and metabolic syndrome. Lipoprotein lipase (LPL), a dimeric enzyme, is the main lipase responsible for TG clearance from the blood after food intake. LPL requires an endoplasmic reticulum (ER)-resident, transmembrane protein known as lipase maturation factor 1 (LMF1) for secretion and enzymatic activity. LMF1 is believed to act as a client specific chaperone for dimeric lipases, but the precise mechanism by which LMF1 functions is not understood. Here, we examine which domains of LMF1 contribute to dimeric lipase maturation by assessing the function of truncation variants. N-terminal truncations of LMF1 show that all the domains are necessary for LPL maturation. Fluorescence microscopy and protease protection assays confirmed that these variants were properly oriented in the ER. We measured cellular levels of LMF1 and found that it is expressed at low levels and each molecule of LMF1 promotes the maturation of 50 or more molecules of LPL. Thus we provide evidence for the critical role of the N-terminus of LMF1 for the maturation of LPL and relevant ratio of chaperone to substrate.
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影响因子:
3.5
作者:
Michael Newman;S. Socransky
通讯作者:
S. Socransky
DOI:
10.1111/j.1600-0722.1977.tb00541.x
发表时间:
1977
期刊:
Scandinavian journal of dental research
影响因子:
--
作者:
J. Slots
通讯作者:
J. Slots
DOI:
10.1099/00207713-33-1-15
发表时间:
1983
影响因子:
2.8
作者:
John L. Johnson;L. Holdeman
通讯作者:
L. Holdeman
影响因子:
6.7
作者:
GOODSON, JM;TANNER, ACR;SOCRANSKY, SS
通讯作者:
SOCRANSKY, SS
影响因子:
3.5
作者:
Kornman,KS;Holt,SC
通讯作者:
Holt,SC