Phase separation of the nuclear pore complex facilitates selective nuclear transport to regulate plant defense against pathogen and pest invasion.
Mol Plant
; 16(6): 1016-1030, 2023 06 05.
Article
in En
| MEDLINE
| ID: mdl-37077045
ABSTRACT
The nuclear pore complex (NPC), the sole exchange channel between the nucleus and cytoplasm, is composed of several subcomplexes, among which the central barrier determines the permeability/selectivity of the NPC to dominate the nucleocytoplasmic trafficking essential for many important signaling events in yeast and mammals. How plant NPC central barrier controls selective transport is a crucial question remaining to be elucidated. In this study, we uncovered that phase separation of the central barrier is critical for the permeability and selectivity of plant NPC in the regulation of various biotic stresses. Phenotypic assays of nup62 mutants and complementary lines showed that NUP62 positively regulates plant defense against Botrytis cinerea, one of the world's most disastrous plant pathogens. Furthermore, in vivo imaging and in vitro biochemical evidence revealed that plant NPC central barrier undergoes phase separation to regulate selective nucleocytoplasmic transport of immune regulators, as exemplified by MPK3, essential for plant resistance to B. cinerea. Moreover, genetic analysis demonstrated that NPC phase separation plays an important role in plant defense against fungal and bacterial infection as well as insect attack. These findings reveal that phase separation of the NPC central barrier serves as an important mechanism to mediate nucleocytoplasmic transport of immune regulators and activate plant defense against a broad range of biotic stresses.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plants
/
Nuclear Pore
Limits:
Animals
Language:
En
Journal:
Mol Plant
Journal subject:
BIOLOGIA MOLECULAR
/
BOTANICA
Year:
2023
Document type:
Article
Affiliation country: