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Review
. 2018 Jan 29;131(2):jcs203695.
doi: 10.1242/jcs.203695.

The retromer, sorting nexins and the plant endomembrane protein trafficking

Nicole Heucken  1 , Rumen Ivanov  2
Affiliations
Review

The retromer, sorting nexins and the plant endomembrane protein trafficking

Nicole Heucken et al. J Cell Sci. .

Abstract

Protein sorting in the endomembrane system is responsible for the coordination of cellular functions. Plant intracellular trafficking has its own unique features, which include specific regulatory aspects of endosomal sorting and recycling of cargo proteins, mediated by the retromer complex. Recent work has led to significant progress in understanding the role of Arabidopsis retromer subunits in recycling vacuolar sorting receptors and plasma membrane proteins. As a consequence, members of the sorting nexin (SNX) protein family and their interaction partners have emerged as critical protein trafficking regulators, in particular with regard to adaptation to environmental change, such as temperature fluctuations and nutrient deficiency. In this Review, we discuss the known and proposed functions of the comparatively small Arabidopsis SNX protein family. We review the available information on the role of the three Bin-Amphiphysin-Rvs (BAR)-domain-containing Arabidopsis thaliana (At)SNX proteins and discuss their function in the context of their potential participation in the plant retromer complex. We also summarize the role of AtSNX1-interacting proteins in different aspects of SNX-dependent protein trafficking and comment on the potential function of three novel, as yet unexplored, Arabidopsis SNX proteins.

Keywords: Environmental response; Protein sorting; Retromer; Sorting nexin; Transporter recycling; Vacuolar sorting receptor.

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Conflict of interest statement

Competing interestsThe authors declare no competing or financial interests.

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