Tobacco plants perturbed in the ubiquitin-dependent protein degradation system accumulate callose, salicylic acid, and pathogenesis-related protein 1

1998 ◽  
Vol 17 (11) ◽  
pp. 876-880 ◽  
Author(s):  
U. Conrath ◽  
D. F. Klessig ◽  
A. Bachmair
Keyword(s):  
Salicylic Acid ◽  
Protein Degradation ◽  
Related Protein ◽  
Tobacco Plants ◽  
Pathogenesis Related Protein ◽  
Pathogenesis Related ◽  
Dependent Protein

Overexpression of a pepper basic pathogenesis-related protein 1 gene in tobacco plants enhances resistance to heavy metal and pathogen stresses

2005 ◽  
Vol 24 (4) ◽  
pp. 216-224 ◽  
Author(s):  
Sujon Sarowar ◽  
Young Jin Kim ◽  
Eui Nam Kim ◽  
Ki Deok Kim ◽  
Byung Kook Hwang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Related Protein ◽  
Tobacco Plants ◽  
Pathogenesis Related Protein ◽  
Pathogenesis Related

scholarly journals A novel basic pathogenesis-related protein from tobacco plants

2005 ◽  
Vol 22 (2) ◽  
pp. 157-159 ◽  
Author(s):  
Kenji Akiyama ◽  
Hirokazu Ueda ◽  
Hiroshi Yoda ◽  
Hiroshi Sano
Keyword(s):  
Related Protein ◽  
Tobacco Plants ◽  
Pathogenesis Related Protein ◽  
Pathogenesis Related

scholarly journals XCP1 is a caspase that proteolyzes Pathogenesis-related protein 1 to produce the cytokine CAPE9 for systemic immunity in Arabidopsis

2021 ◽  
Author(s):  
Ying-Lan Chen ◽  
Fan-Wei Lin ◽  
Kai-Tan Cheng ◽  
Hung-Yu Wang ◽  
Thomas Efferth ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Immunity ◽  
Related Protein ◽  
Proteolytic Activation ◽  
Systemic Immunity ◽  
Pathogenesis Related Protein ◽  
Pathogenesis Related ◽  
Comparable Activity ◽  
Molecular Patterns ◽  
Substrate Motif

Abstract Proteolytic activation of cytokines regulates immunity in diverse organisms. In animals, cysteine-dependent aspartate-specific proteases (caspases) play central roles in cytokine maturation. Although the proteolytic production of peptide cytokines is also essential for plant immunity, evidence for a plant caspase is still lacking. In this study, we discovered that proteolysis of a caspase-like substrate motif “CNYD” within Pathogenesis-related protein 1 (AtPR1) in Arabidopsis generates an immunomodulatory cytokine (AtCAPE9). Salicylic acid enhances CNYD-targeted protease activity and the proteolytic release of AtCAPE9 from AtPR1 in Arabidopsis. We show that this process involves a caspase, identified as Xylem cysteine peptidase 1 (XCP1). XCP1 exhibits a calcium-modulated pH-activity profile and a comparable activity to human caspases. XCP1 is required to induce systemic immunity triggered by pathogen-associated molecular patterns. This work reveals XCP1 as the first known plant caspase, which produces the cytokine AtCAPE9 from the canonical salicylic acid signaling marker PR1 to activate systemic immunity.

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