A two-hybrid-receptor assay demonstrates heteromer formation as switch-on for plant immune receptors.
Plant Physiol
; 163(4): 1504-9, 2013 Dec.
Article
em En
| MEDLINE
| ID: mdl-24130196
ABSTRACT
Receptor kinases sense extracellular signals and trigger intracellular signaling and physiological responses. However, how does signal binding to the extracellular domain activate the cytoplasmic kinase domain? Activation of the plant immunoreceptor Flagellin sensing2 (FLS2) by its bacterial ligand flagellin or the peptide-epitope flg22 coincides with rapid complex formation with a second receptor kinase termed brassinosteroid receptor1 associated kinase1 (BAK1). Here, we show that the receptor pair of FLS2 and BAK1 is also functional when the roles of the complex partners are reversed by swapping their cytosolic domains. This reciprocal constellation prevents interference by redundant partners that can partially substitute for BAK1 and demonstrates that formation of the heteromeric complex is the molecular switch for transmembrane signaling. A similar approach with swaps between the Elongation factor-Tu receptor and BAK1 also resulted in a functional receptor/coreceptor pair, suggesting that a "two-hybrid-receptor assay" is of more general use for studying heteromeric receptor complexes.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Plantas
/
Receptores Imunológicos
/
Técnicas do Sistema de Duplo-Híbrido
/
Multimerização Proteica
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article