Open AccessLate Embryogenesis Abundant Protein–Client Protein Interactions
Author(s) -
Lynnette M.A. Dirk,
Caser G. Abdel,
Imran Ahmad,
Izabel Costa Silva Neta,
Cristiane Carvalho Pereira,
Francisco Élder Carlos Bezerra Pereira,
Sandra Helena UnêdaTrevisoli,
Daniel Guariz Pinheiro,
A. Bruce Downie
Publication year - 2020
Publication title -
plants
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.892
H-Index - 32
ISSN - 2223-7747
DOI - 10.3390/plants9070814
Subject(s) - leaps , proteome , function (biology) , microbiology and biotechnology , biology , protein family , computational biology , bioinformatics , genetics , business , finance , gene
The intrinsically disordered proteins belonging to the LATE EMBRYOGENESIS ABUNDANT protein (LEAP) family have been ascribed a protective function over an array of intracellular components. We focus on how LEAPs may protect a stress-susceptible proteome. These examples include instances of LEAPs providing a shield molecule function, possibly by instigating liquid-liquid phase separations. Some LEAPs bind directly to their client proteins, exerting a holdase-type chaperonin function. Finally, instances of LEAP-client protein interactions have been documented, where the LEAP modulates (interferes with) the function of the client protein, acting as a surreptitious rheostat of cellular homeostasis. From the examples identified to date, it is apparent that client protein modulation also serves to mitigate stress. While some LEAPs can physically bind and protect client proteins, some apparently bind to assist the degradation of the client proteins with which they associate. Documented instances of LEAP-client protein binding, even in the absence of stress, brings to the fore the necessity of identifying how the LEAPs are degraded post-stress to render them innocuous, a first step in understanding how the cell regulates their abundance.