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First published online September 2, 2003
doi: 10.1242/10.1242/jcs.00733

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Ligand-receptor pairs in plant peptide signaling

Graduate School of Bio-Agricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (e-mail: matsu{at}agr.nagoya-u.ac.jp)

View larger version (57K): [in a new window]   Fig. 1. Ligand-receptor pairs in plant peptide signaling. Systemin is produced by post-translational processing of a precursor, prosystemin, and recognized by SR160 receptor-like kinase, which induces defense gene activation. PSK is produced from the precursor proPSK by sulfation and post-translational processing. Secreted PSK interacts with receptor-like kinase PSKR and activates a set of genes responsible for cellular dedifferentiation and redifferentiation. CLV3 is translated, secreted and binds a CLV1/CLV2 receptor-like kinase complex, which regulates the balance between meristem cell proliferation and differentiation. SCR/SP11 is translated, secreted and interacts with the S locus receptor-like kinase SRK, which triggers self-incompatibility responses.

View larger version (20K): [in a new window]   Fig. 2. Protein domain configurations of SR160, PSKR, CLV1/CLV2 and SRK.