A family of plasmodesmal proteins with receptor-like properties for plant viral movement proteins.
Plasmodesmata (PD) are essential but poorly understood structures in plant cell walls that provide symplastic continuity and intercellular communication pathways between adjacent cells and thus play fundamental roles in development and pathogenesis. Viruses encode movement proteins (MPs) that modify these tightly regulated pores to facilitate their spread from cell to cell. The most striking of these modifications is observed for groups of viruses whose MPs form tubules that assemble in PDs and through which virions are transported to neighbouring cells. The nature of the molecular interactions between viral MPs and PD components and their role in viral movement has remained essentially unknown. Here, we show that the family of PD-located proteins (PDLPs) promotes the movement of viruses that use tubule-guided movement by interacting redundantly with tubule-forming MPs within PDs. Genetic disruption of this interaction leads to reduced tubule formation, delayed infection and attenuated symptoms. Our results implicate PDLPs as PD proteins with receptor-like properties involved the assembly of viral MPs into tubules to promote viral movement.
Amari
Khalid
K
Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, Strasbourg, France.
Boutant
Emmanuel
E
Hofmann
Christina
C
Schmitt-Keichinger
Corinne
C
Fernandez-Calvino
Lourdes
L
Didier
Pascal
P
Lerich
Alexander
A
Mutterer
Jérome
J
Thomas
Carole L
CL
Heinlein
Manfred
M
Mély
Yves
Y
Maule
Andrew J
AJ
Ritzenthaler
Christophe
C
D017360:Arabidopsis / Q000254:growth & development / Q000378:metabolism / Q000821:virology; D002450:Cell Communication; D002473:Cell Wall / Q000378:metabolism; D027465:Chenopodium quinoa / Q000254:growth & development / Q000378:metabolism / Q000821:virology; D015151:Immunoblotting; D010935:Plant Diseases / Q000821:virology*; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism / Q000821:virology; D053830:Plant Viral Movement Proteins / Q000378:metabolism*; D010942:Plant Viruses / Q000502:physiology*; D031425:Plasmodesmata / Q000378:metabolism* / Q000821:virology*; D021381:Protein Transport; D012367:RNA, Viral / Q000235:genetics; D011956:Receptors, Cell Surface / Q000378:metabolism*; D014026:Nicotiana / Q000254:growth & development / Q000378:metabolism / Q000821:virology
D053830:Plant Viral Movement Proteins; D012367:RNA, Viral; D011956:Receptors, Cell Surface