Journal
BIOCHEMISTRY
Volume 46, Issue 10, Pages 2553-2563Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bi602509c
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The gamma-secretase complex is an intramembrane aspartyl protease that cleaves its substrates along their transmembrane regions. Sequential proteolytic processing of amyloid precursor protein by beta- and gamma-secretase produces amyloid beta-peptides, which are the major components of amyloid plaques in the brains of Alzheimer's disease patients. The gamma-secretase complex is therefore believed to be critical in the pathogenesis of Alzheimer's disease. Here we review the range of factors found to affect the nature and degree of gamma-secretase complex activity; these include gamma-secretase complex assembly and activation, the integral regulatory subunit CD147, transient or weak binding partners, the levels of cholesterol and sphingolipids in cell membranes, and inflammatory cytokines. Integrated knowledge of the molecular mechanisms supporting the actions of these factors is expected to lead to a comprehensive understanding of the functional regulation of the gamma-secretase complex, and this, in turn, should facilitate the development of novel therapeutic strategies for the treatment of Alzheimer's disease.
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