ADA2 Forms Nuclear Condensates with GCN5 and ATP-Citrate Lyase (ACL) to Modulate H3K9 Acetylation at Genes Functioning in Rice Meristems.

ABSTRACT: SAGA (Spt-Ada-Gcn5 acetyltransferase) is a highly conserved histone acetyltransferase (HAT) complex in eukaryotes, playing a crucial role in regulating gene transcription during development. The complex consists of two core components: GCN5, the HAT subunit, and ADA2, which primarily functions as an adaptor and enhances the complex HAT activity. Beyond its well-established roles, it is discovered in this work that ADA2 in rice possesses a broadly existing intrinsically disordered region (IDR) that directs the formation of nuclear condensates. Moreover, ADA2 is found to interact with a subunit of ATP-citrate lyase (ACL), an enzyme that produces acetyl-CoA, leading to the formation of a GCN5-ADA2-ACL (GAA) complex. ADA2 promotes the condensation of both GCN5 and ACL in vivo. Within these con

SUBMITTER: Yue Y 

PROVIDER: S-EPMC12849889 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature