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Proc Natl Acad Sci U S A. 2002 Jul 9;99(14):9585-90. Epub 2002 Jun 11.

The systemin receptor SR160 from Lycopersicon peruvianum is a member of the LRR receptor kinase family.

Author information

1
Institute of Biological Chemistry, Washington State University, Pullman, WA 99164-6340, USA.

Abstract

The isolation to homogeneity of the 160-kDa systemin cell-surface receptor (SR160) from plasma membranes of suspension cultured cells of Lycopersicon peruvianum is reported. The purification procedure resulted in recovery of 13 microg of pure receptor protein, representing an 8,200-fold purification. Gel blot analyses using SR160-specific antibodies confirmed that a cross-reacting protein in the membranes of suspension-cultured cells comigrates with both the native and a deglycosylated form of the radiolabeled receptor. Internal amino acid sequences of the purified protein facilitated the isolation of a cDNA clone encoding the 160-kDa receptor. The identity of the encoded protein as SR160 was further confirmed by a comparison of its sequence with a mass spectral fingerprint of the SR160 protein. The deduced amino acid sequence of SR160 revealed that it is a member of the leucine-rich repeat (LRR) receptor kinase family, closely related to the brassinolide receptor kinase, BRI1.

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PMID:
12060717
PMCID:
PMC123184
DOI:
10.1073/pnas.132266499
[Indexed for MEDLINE]
Free PMC Article

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