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New Phytol. 2014 Aug;203(3):758-69. doi: 10.1111/nph.12867. Epub 2014 Jun 4.

S-acylation anchors remorin proteins to the plasma membrane but does not primarily determine their localization in membrane microdomains.

Author information

1
Ludwig-Maximilians-University (LMU) Munich, Institute of Genetics, 82152, Martinsried, Germany.

Abstract

Remorins are well-established marker proteins for plasma membrane microdomains. They specifically localize to the inner membrane leaflet despite an overall hydrophilic amino acid composition. Here, we determined amino acids and post-translational lipidations that are required for membrane association of remorin proteins. We used a combination of cell biological and biochemical approaches to localize remorin proteins and truncated variants of those in living cells and determined S-acylation on defined residues in these proteins. S-acylation of cysteine residues in a C-terminal hydrophobic core contributes to membrane association of most remorin proteins. While S-acylation patterns differ between members of this multi-gene family, initial membrane association is mediated by protein-protein or protein-lipid interactions. However, S-acylation is not a key determinant for the localization of remorins in membrane microdomains. Although remorins bind via a conserved mechanism to the plasma membrane, other membrane-resident proteins may be involved in the recruitment of remorins into membrane domains. S-acylation probably occurs after an initial targeting of the proteins to the plasma membrane and locks remorins in this compartment. As S-acylation is a reversible post-translational modification, stimulus-dependent intracellular trafficking of these proteins can be envisioned.

KEYWORDS:

S-acylation; membrane domain; palmitoylation; protein-protein interaction; remorin

PMID:
24897938
DOI:
10.1111/nph.12867
[Indexed for MEDLINE]
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