Sesma Ane, Castresana Carmen, Castellano M Mar
Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid - Instituto Nacional de Investigación y Tecnología Agraria y AlimentariaMadrid, Spain.
Departamento Biotecnología y Biología Vegetal, Universidad Politécnica de MadridMadrid, Spain.
Front Plant Sci. 2017 Apr 26;8:644. doi: 10.3389/fpls.2017.00644. eCollection 2017.
An important step in eukaryotic gene expression is the synthesis of proteins from mRNA, a process classically divided into three stages, initiation, elongation, and termination. Translation is a precisely regulated and conserved process in eukaryotes. The presence of plant-specific translation initiation factors and the lack of well-known translational regulatory pathways in this kingdom nonetheless indicate how a globally conserved process can diversify among organisms. The control of protein translation is a central aspect of plant development and adaptation to environmental stress, but the mechanisms are still poorly understood. Here we discuss current knowledge of the principal mechanisms that regulate translation initiation in plants, with special attention to the singularities of this eukaryotic kingdom. In addition, we highlight the major recent breakthroughs in the field and the main challenges to address in the coming years.
真核生物基因表达的一个重要步骤是从mRNA合成蛋白质,这一过程传统上分为三个阶段:起始、延伸和终止。翻译在真核生物中是一个精确调控且保守的过程。然而,植物特异性翻译起始因子的存在以及该领域缺乏知名的翻译调控途径,这表明一个全球保守的过程在不同生物体中是如何多样化的。蛋白质翻译的控制是植物发育和适应环境胁迫的核心方面,但其机制仍知之甚少。在这里,我们讨论了目前关于植物中调节翻译起始的主要机制的知识,特别关注这个真核生物领域的独特之处。此外,我们强调了该领域最近的重大突破以及未来几年需要解决的主要挑战。