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A Proposed Model of OsCUL3a Action.
OsCUL3a assembles with OsRBX1 and an unknown BTB domain-containing protein to form an E3 ligase complex that promotes the degradation of OsNPR1 via the 26S proteasome system. OsNPR1 highly accumulates in oscul3a mutant plants, resulting in cell death and immunity.
