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Nat Protoc. 2014 Feb;9(2):312-22. doi: 10.1038/nprot.2014.016. Epub 2014 Jan 16.

Isolation of plasma membrane-associated membranes from rat liver.

Author information

1
1] Nencki Institute of Experimental Biology, Department of Biochemistry, Warsaw, Poland. [2] Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI) and Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy.
2
Nencki Institute of Experimental Biology, Department of Biochemistry, Warsaw, Poland.
3
Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI) and Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy.

Abstract

Dynamic interplay between intracellular organelles requires a particular functional apposition of membrane structures. The organelles involved come into close contact, but do not fuse, thereby giving rise to notable microdomains; these microdomains allow rapid communication between the organelles. Plasma membrane-associated membranes (PAMs), which are microdomains of the plasma membrane (PM) interacting with the endoplasmic reticulum (ER) and mitochondria, are dynamic structures that mediate transport of proteins, lipids, ions and metabolites. These structures have gained much interest lately owing to their roles in many crucial cellular processes. Here we provide an optimized protocol for the isolation of PAM, PM and ER fractions from rat liver that is based on a series of differential centrifugations, followed by the fractionation of crude PM on a discontinuous sucrose gradient. The procedure requires ∼8-10 h, and it can be easily modified and adapted to other tissues and cell types.

PMID:
24434800
DOI:
10.1038/nprot.2014.016
[Indexed for MEDLINE]

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