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Apolipoprotein E (ApoE) serves as a ligand for the low-density lipoprotein (LDL) receptor and cell surface receptors of the LDL receptor gene family. More than 10 different causative apoE mutations associated with lipoprotein glomerulopathy (LPG) have been reported. ApoE polymorphisms including three common phenotypes (E2, E3, E4), and a variety of rare mutations can affect blood cholesterol and triglyceride levels. The N-terminal domain of apoE is folded into a four-helix bundle of amphipathic α-helices, and contains the receptor-binding domain in which most apoE mutations that cause LPG or dominant mode of type III hyperlipoproteinemia (HL) are located. No single apoE mutation has been reported that causes both LPG and the dominant mode of type III HL.


Akira Matsunaga, Takao Saito. Apolipoprotein E mutations: a comparison between lipoprotein glomerulopathy and type III hyperlipoproteinemia. Clinical and experimental nephrology. 2014 Apr;18(2):220-4

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PMID: 24570178

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