Eukaryotic initiation factor 3 (eIF3) and 5??? mRNA leader sequences as agents of translational regulation in Arabidopsis. Final report

von Arnim, Albrecht G.¹ 

[1] Univ. of Tennessee, Knoxville, TN (United States)

关键词: TRANSLATION;    PROTEIN SYNTHESIS;    ARABIDOPSIS;   

DOI  :  10.2172/1169186
RP-ID  :  DOE-UTK--20223
PID  :  OSTI ID: 1169186

美国|英语

来源: SciTech Connect

【 摘 要 】

Protein synthesis, or translation, consumes a sizable fraction of the cell???s energy budget, estimated at 5% and up to 50% in differentiated and growing cells, respectively. Plants also invest significant energy and biomass to construct and maintain the translation apparatus. Translation is regulated by a variety of external stimuli. Compared to transcriptional control, attributes of translational control include reduced sensitivity to stochastic fluctuation, a finer gauge of control, and more rapid responsiveness to environmental stimuli. Yet, our murky understanding of translational control allows few generalizations. Consequently, translational regulation is underutilized in the context of transgene regulation, although synthetic biologists are now beginning to appropriate RNA-level gene regulation into their regulatory circuits. We also know little about how translational control contributes to the diversity of plant form and function. This project explored how an emerging regulatory mRNA sequence element, upstream open reading frames (uORFs), is integrated with the general translation initiation machinery to permit translational regulation on specific mRNAs.