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A m6A methyltransferase fine-tune m6A modification and ubiquitination to balance antiviral immunity and yield

ABSTRACT: Posttranscriptional and posttranslational modifications play crucial roles in plant immunity. However, how plant fine-tune these two modifications to activate antiviral immunity remains unknown. Here, we report that the m6A methyltransferase TaHAKAI is utilized by wheat yellow mosaic virus (WYMV) to increase viral genomic m6A modification and promotes viral replication. However, TaHAKAI also functions as an E3 ligase that targets the viral RNA silencing suppressor P2 for degradation and inhibits viral infection. A major allele of TaHAKAI in susceptible cultivar reduced the E3 ligase activity but not m6A methyltransferase activity, promoting viral infection. Interestingly, TaHAKAIR attenuates the mRNA stability of TaWPS1, the negative regulator of spike development, to increase panicle length and spikelet number by modulating its m6A modification. Our study reveals a new mechanisms of balancing disease resistance and yield by fine-tuning m6A modification and ubiquitination.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Triticum Aestivum (wheat)

TISSUE(S): Leaf

SUBMITTER: 俊郭

LAB HEAD: Guo Jun

PROVIDER: PXD056650 | Pride | 2024-10-09

REPOSITORIES: Pride

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