Disordered plant LEA proteins as molecular chaperones.

TitleDisordered plant LEA proteins as molecular chaperones.
Publication TypeJournal Article
Year of Publication2008
AuthorsKovacs, D., B. Agoston, and P. Tompa
JournalPlant Signal Behav
Volume3
Issue9
Pagination710-3
Date Published2008 Sep
ISSN1559-2316
Abstract

Plants often respond to abiotic stresses by the increased expression of LEA (late embryogenesis abundant) proteins, so called because they also accompany seed formation. Whereas the cellular function of LEA proteins in mitigating the damage caused by stress is clear, the molecular mechanisms of their action are rather enigmatic. Several models have been developed, based on their putative activities as ion sinks, stabilizers of membrane structure, buffers of hydrate water, antioxidants and/or chaperones. Due to their known structural flexibility, this latter idea has received little experimental attention thus far. Recently, however, it has been suggested that intrinsically disordered proteins (IDPs) may exert chaperone activity by an "entropy transfer" mechanism. In our subsequent study published in the May issue of Plant Physiology, we provided evidence that two group 2 LEA proteins, ERD (early response to dehydration) 10 and 14, are potent molecular chaperones. This observation may have far-reaching implications, as it may explain how LEA proteins of ill-defined structures protect plant cells during dehydration, and it may also lead to the general experimental validation of the entropy transfer model of disordered chaperones.

Alternate JournalPlant Signal Behav
PubMed ID19704836
PubMed Central IDPMC2634567