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RHO OF PLANTS signalling and the activating ROP GUANINE NUCLEOTIDE EXCHANGE FACTORS: specificity in cellular signal
1Plant Systems Biology, School of Life Sciences, Technical University of Munich, Emil-Ramann-Strasse 8, 85354 Freising, Germany.
Journal of Experimental Botany
|April 29, 2024
Summary
Plant cells use receptor-like kinases (RLKs) to sense signals. This review explores how RHO OF PLANTS (ROP) signaling complexes achieve specificity through scaffold proteins and guanine nucleotide exchange factors.
Area of Science:
- Plant cell signaling
- Molecular biology
- Cell polarity
Background:
- RECEPTOR-LIKE KINASEs (RLKs) perceive external signals in plants.
- RHO OF PLANTS (ROP) proteins are key molecular switches for polar signal transduction downstream of RLKs.
- While ROP regulators are known, the spatiotemporal composition and specificity of ROP signaling complexes remain unclear.
Purpose of the Study:
- To review recent advances in ROP signaling.
- To elucidate how scaffold proteins achieve specificity in ROP pathways.
- To discuss the composition of ROP signaling complexes and their regulation.
Main Methods:
- Literature review of recent advances in ROP signaling research.
- Analysis of known ROP-regulating and scaffold proteins.
- Discussion of plant-specific ROP GUANINE NUCLEOTIDE EXCHANGE FACTORS.
Main Results:
- ROP signaling specificity is achieved through downstream scaffold proteins.
- ROP signaling complexes may contain both activators and inactivators to balance ROP activity.
- Plant-specific ROP GUANINE NUCLEOTIDE EXCHANGE FACTORS are crucial for polarizing ROP signaling.
Conclusions:
- Scaffold proteins play a critical role in conferring specificity to ROP signaling pathways.
- Understanding ROP complex composition is essential for deciphering cell polarity regulation.
- ROP GUANINE NUCLEOTIDE EXCHANGE FACTORS are central to directed ROP signaling in plants.
Keywords:
AuxinRECEPTOR LIKE KINASEs (RLKs)ROPROPGEFcell divisioncell polaritymembrane domainphytohormonessignallingtip-growthMore Related Videos
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