PR1 — Brassica juncea

Summary

BJUA03G19630S (BjPR1) on chromosome A03 encodes a pathogenesis-related protein 1, a member of the CAP superfamily with a CRISP-related domain. The gene product exhibits cytokine activity and protein binding, and is associated with cytokine production, activation of immune response, and priming of cellular response to stress. BjPR1 is associated with defense responses against fungi, insects, nematodes, and bacterial pathogens including Pseudomonas syringae and Rhizoctonia solani, as well as systemic acquired resistance and salicylic acid signaling. It is linked to responses to cadmium, salt, acid rain, and thiamin, and to processes including seed germination, sexual reproduction, cell death, and sterol and isoprenoid anabolism. The protein localizes to secretory vesicles, the vacuole, the plant-type cell wall, and the extracellular space. Studies of related genes in other species link the PR1 family to disease resistance, systemic immunity, and abiotic stress tolerance.