Late Embryogenesis Abundant Protein–Client Protein Interactions
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 29, 2020
- Source ID
- 10.3390/plants9070814
Entities
People
- A Bruce Downie
- Caser Ghaafar Abdel
- Cristiane Carvalho Pereira
- Daniel Guariz Pinheiro
- Francisco Elder Carlos Bezerra Pereira
- Imran Ahmad
- Izabel Costa Silva Neta
- Lynnette M A Dirk
- Sandra Helena Unêda-Trevisoli
Organizations
- Agricultural Research Service
- Army Research Office
- Higher Education Commission of Pakistan