The rice immune receptor XA21 recognizes a tyrosine-sulfated protein from a Gram-negative bacterium

The rice immune receptor XA21 recognizes a tyrosine-sulfated protein from a Gram-negative bacterium [1]

Surveillance of the extracellular environment by immune receptors is of central importance to eukaryotic survival. The rice receptor kinase XA21, which confers robust resistance to most strains of the Gram-negative bacterium Xanthomonas oryzae pv. oryzae (Xoo), is representative of a large class of cell surface immune receptors in plants and animals. We report the identification of a previously undescribed Xoo protein, called RaxX, which is required for activation of XA21-mediated immunity. Xoo strains that lack RaxX, or carry mutations in the single RaxX tyrosine residue (Y41), are able to evade XA21-mediated immunity. Y41 of RaxX is sulfated by the prokaryotic tyrosine sulfotransferase RaxST. Sulfated, but not nonsulfated, RaxX triggers hallmarks of the plant immune response in an XA21-dependent manner.

Original Source [2]

Publication Date:

24/07/2015

Author(s): Rory N. Pruitt [3], Benjamin Schwessinger [4], Anna Joe & et al [5]

Source: Science Advances [6]

pp:

1-12

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