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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
The multifaceted roles of NUCLEAR FACTOR-Y in Arabidopsis thaliana development and stress responses.
NUCLEAR FACTOR-Y (NF-Y) is a heterotrimeric transcription factor (TF) consisting of evolutionarily distinct NF-YA, NF-YB and NF-YC subunits. The functional NF-Y heterotrimer binds to CCAAT elements in eukaryotic gene promoters and influences their expression. The genome of the model organism Arabidopsis thaliana encodes 10 distinct NF-YA, NF-YB, and NF-YC proteins, allowing for enormous combinatorial and functional diversity. Two decades of research have elucidated the importance of NF-Ys in plant growth, development and stress responses; however, the molecular mechanisms of action remain largely unexplored. Intriguingly, recent evidence suggests that NF-Ys are frequently associated with other groups of TFs, expanding the potential NF-Y combinatorial complexity. Further, information regarding the regulation of individual NF-Y subunits at the transcriptional and post-transcriptional level is beginning to emerge. In this review, we will identify developing trends within the NF-Y field and discuss recent progress towards a better understanding of NF-Y function, molecular action, and regulation in the context of Arabidopsis. This article is part of a Special Issue entitled: Nuclear Factor Y in Development and Disease, edited by Prof. Roberto Mantovani.
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