A Membrane-Anchored Protein Kinase Involved in Brassica Self-Incompatibility Signaling

@article{Murase2004AMP,
  title={A Membrane-Anchored Protein Kinase Involved in Brassica Self-Incompatibility Signaling},
  author={Kohji Murase and Hiroshi Shiba and Megumi Iwano and F S Che and Masao Watanabe and Akira Isogai and Seiji Takayama},
  journal={Science},
  year={2004},
  volume={303},
  pages={1516 - 1519}
}
Self-incompatibility (SI) response in Brassica is initiated by haplotype-specific interactions between the pollen-borne ligand S locus protein 11/SCR and its stigmatic S receptor kinase, SRK. This binding induces autophosphorylation of SRK, which is then thought to trigger a signaling cascade that leads to self-pollen rejection. A recessive mutation of the modifier (m) gene eliminates the SI response in stigma. Positional cloning of M has revealed that it encodes a membrane-anchored cytoplasmic… Expand
Direct interaction between S-locus receptor kinase and M-locus protein kinase involved in Brassica self-incompatibility signaling
TLDR
Results suggest that MLPK could be a direct target of SRK in Brassica SI signaling, and an in vitro phosphorylation assay indicated that the kinase domain ofSRK could efficiently phosphorylate MLPK. Expand
Functional test of Brassica self-incompatibility modifiers in Arabidopsis thaliana
TLDR
It is shown that the A. thaliana ARC1 ortholog is a highly decayed pseudogene, and that, unlike reports in Brassica, inactivation of the MLPK ortholog AtAPK1b and overexpression of Exo70A1 neither abolish nor weaken SI in A.Thaliana SRK-SCR plants. Expand
Calcium signalling mediates self-incompatibility response in the Brassicaceae
TLDR
It is shown that Ca2+ influx into stigma papilla cells mediates self-incompatibility signalling, and this results suggest that Ca 2+ influx mediated by GLR is the essential self- incompatibility response leading to self-pollen rejection. Expand
Complex networks of self-incompatibility signaling in the Brassicaceae.
TLDR
The self-incompatibility response is now thought to be based on a phosphorylation and ubiquitin-mediated degradation pathway that inhibits the secretion of factors required for successful pollination. Expand
Progress on deciphering the molecular aspects of cell-to-cell communication in Brassica self-incompatibility response
TLDR
Recent advances made on understanding the molecular aspects of genetic mechanism of self-incompatibility in Brassicaceae are described. Expand
Two Distinct Forms of M-Locus Protein Kinase Localize to the Plasma Membrane and Interact Directly with S-Locus Receptor Kinase to Transduce Self-Incompatibility Signaling in Brassica rapa[W]
TLDR
Results suggest that MLPK isoforms localize to the papilla cell membrane and interact directly with SRK to transduce SI signaling in planta. Expand
When no means no: guide to Brassicaceae self-incompatibility.
More than half of the flowering plants have a sophisticated mechanism for self-pollen rejection, named self-incompatibility (SI). In Brassicaceae, recognition specificity is achieved by theExpand
A conserved role for the ARC1 E3 ligase in Brassicaceae self-incompatibility
TLDR
A mini review highlights the recent progress in establishing ARC1’s conserved role in self-pollen rejection in Brassica and Arabidopsis species and discusses future research directions in this field. Expand
Regulation of Self-Incompatibility by Endocytic Trafficking
TLDR
It is suggested that endocytosis is required for self-incompatibility, and that SRK may be signaling from endosomal compartments, while in Brassica oleracea, the receptor is mostly localized in endosomes and to a lesser extent at the plasma membrane. Expand
‘Self’ Pollen Rejection Through the Intersection of Two Cellular Pathways in the Brassicaceae: Self-Incompatibility and the Compatible Pollen Response
TLDR
The present knowledge of the various cellular components that act in concert during the SI response are reviewed and the cellular mechanisms of how SI can cause pollen rejection through the inhibition of stigmatic factors that promote compatible pollen acceptance are discussed. Expand
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