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Structural Basis for Assembly and Function of a Heterodimeric Plant Immune Receptor
Williams, Simon J.,Sohn, Kee Hoon,Wan, Li,Bernoux, Maud,Sarris, Panagiotis F.,Segonzac, Cecile,Ve, Thomas,Ma, Yan,Saucet, Simon B.,Ericsson, Daniel J.,Casey, Lachlan W.,Lonhienne, Thierry,Winzor, Dona American Association for the Advancement of Scienc 2014 Science Vol.344 No.6181
<P><B>Universal Immune Function</B></P><P>Certain pathogen effectors are detected in plants by cytoplasmic receptors. First solving the crystal structures of <I>Arabidopsis</I> receptors, <B>Williams <I>et al.</I></B> (p. 299; see the Perspective by <B>Nishimura and Dangl</B>) discovered that in the resting state, the structures form a heterodimer that readies the complex for effector binding and keeps the signaling domains from firing too early. Once the pathogen effector binds, the structure of the complex shifts such that the signaling domains can form a homodimer to initiate downstream signaling. Similarities between these plant-pathogen receptors and Toll-like receptors in animals suggest the molecular mechanisms may translate broadly.</P>