Abstract:
:Being sessile organisms, plants evolved an unparalleled plasticity in their post-embryonic development, allowing them to adapt and fine-tune their vital parameters to an ever-changing environment. Crosstalk between plants and their environment requires tight regulation of information exchange at the plasma membrane (PM). Plasma membrane proteins mediate such communication, by sensing variations in nutrient availability, external cues as well as by controlled solute transport across the membrane border. Localization and steady-state levels are essential for PM protein function and ongoing research identified cis- and trans-acting determinants, involved in control of plant PM protein localization and turnover. In this overview, we summarize recent progress in our understanding of plant PM protein sorting and degradation via ubiquitylation, a post-translational and reversible modification of proteins. We highlight characterized components of the machinery involved in sorting of ubiquitylated PM proteins and discuss consequences of protein ubiquitylation on fate of selected PM proteins. Specifically, we focus on the role of ubiquitylation and PM protein degradation in the regulation of polar auxin transport (PAT). We combine this regulatory circuit with further aspects of PM protein sorting control, to address the interplay of events that might control PAT and polarized growth in higher plants.
journal_name
J Integr Plant Bioljournal_title
Journal of integrative plant biologyauthors
Korbei B,Luschnig Cdoi
10.1111/jipb.12059subject
Has Abstractpub_date
2013-09-01 00:00:00pages
809-23issue
9eissn
1672-9072issn
1744-7909journal_volume
55pub_type
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journal_title:Journal of integrative plant biology
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