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Gene Review:

PRK2 - receptor-like protein kinase

Solanum lycopersicum

Muschietti, J. et al., Wengier, D. et al.

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High impact information on LePRK2

The abundance of LePRK2 increases when pollen germinates, but LePRK1 remains constant [1].
Both LePRK1 and LePRK2 are localized to the plasma membrane/cell wall of growing pollen tubes [1].
The style component(s) that dephosphorylates LePRK2 is likely to be a heat-stable peptide that is present in exudate from the style [2].

Biological context of LePRK2

In phosphorylation assays with pollen membrane preparations, LePRK2, but not LePRK1, is phosphorylated, and the addition of tomato style, but not leaf, extracts to these membrane preparations results at least partially in specific dephosphorylation of LePRK2 [1].

References

Pollen tube localization implies a role in pollen-pistil interactions for the tomato receptor-like protein kinases LePRK1 and LePRK2. Muschietti, J., Eyal, Y., McCormick, S. Plant Cell (1998) [Pubmed]
The receptor kinases LePRK1 and LePRK2 associate in pollen and when expressed in yeast, but dissociate in the presence of style extract. Wengier, D., Valsecchi, I., Cabanas, M.L., Tang, W.H., McCormick, S., Muschietti, J. Proc. Natl. Acad. Sci. U.S.A. (2003) [Pubmed]

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