Both plant and animal LEA proteins act as kinetic stabilisers of polyglutamine-dependent protein aggregation.

Abstract:

:LEA (late embryogenesis abundant) proteins are intrinsically disordered proteins that contribute to stress tolerance in plants and invertebrates. Here we show that, when both plant and animal LEA proteins are co-expressed in mammalian cells with self-aggregating polyglutamine (polyQ) proteins, they reduce aggregation in a time-dependent fashion, showing more protection at early time points. A similar effect was also observed in vitro, where recombinant LEA proteins were able to slow the rate of polyQ aggregation, but not abolish it altogether. Thus, LEA proteins act as kinetic stabilisers of aggregating proteins, a novel function in protein homeostasis consistent with a proposed role as molecular shields.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Liu Y,Chakrabortee S,Li R,Zheng Y,Tunnacliffe A

doi

10.1016/j.febslet.2011.01.020

subject

Has Abstract

pub_date

2011-02-18 00:00:00

pages

630-4

issue

4

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(11)00041-X

journal_volume

585

pub_type

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