Nuclear-localized pyruvate kinases control phosphorylation of histone H3 on threonine 11
Nature Plants, ISSN: 2055-0278, Vol: 10, Issue: 11, Page: 1682-1697
2024
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Article Description
Phosphorylation of histone H3 at threonine 11 (H3T11ph) affects transcription and chromosome stability. However, the enzymes responsible for depositing H3T11ph and the functions of H3T11ph in plants remain unknown. Here we report that in Arabidopsis thaliana, PYRUVATE KINASE 6 (PK6), PK7 and PK8 enter the nucleus under conditions of sufficient glucose and light exposure, where they interact with SWI2/SNF2-RELATED 1 COMPLEX 4 (SWC4) and phosphorylate H3 at threonine 11. Mutations in these kinases or knockdown of SWC4 resulted in FLC-dependent early flowering, short hypocotyls and short pedicels. Genome-wide, H3T11ph is highly enriched at transcription start sites and transcription termination sites, and positively correlated with gene transcript levels. PK6 and SWC4 targeted FLC, MYB73, PRE1, TCP4 and TCP10, depositing H3T11ph at these loci and promoting their transcription, and PK6 occupancy at these loci requires SWC4. Together, our results reveal that nuclear-localized PK6, PK7 and PK8 modulate H3T11ph and plant growth.
Bibliographic Details
Springer Science and Business Media LLC
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