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chenglong9797

木虫 (著名写手)

[求助] 求助:英译汉,一段摘要

Recent advances in RNA nanotechnology allow the rational design of various nanoarchitectures
Previous methods utilized conserved angles from natural RNA motifs to form geometries with specific sizes.
However, the feasibility of producing RNA architecture with variable sizes using native motifs featuring fixed sizes and angles is limited. It would be advantageous to display RNA nanoparticles of diverse shape and size derived from a given primary sequence. Here, we report an approach to construct RNA nanoparticles with tunable size and stability. Multifunctional RNA squares with a 90° angle were constructed by tuning the 60° angle of the three-way junction (3WJ) motif from the packaging RNA (pRNA) of the bacteriophage phi29 DNA packaging motor. The physicochemical properties and size of the RNA square were also easily tuned by modulating the “core” strand and adjusting the length of the sides of the square via predictable design. Squares of 5, 10, and 20 nm were constructed, each showing diverse thermodynamic and chemical stabilities. Four “arms” extending from the corners of the square were used to incorporate siRNA, ribozyme, and fluorogenic RNA motifs. Unique intramolecular contact using the pre-existing intricacy of the 3WJ avoids relatively weaker intermolecular interactions via kissing loops or sticky ends. Utilizing the 3WJ motif, we have employed a modular design technique to construct variable-size RNA squares with controllable properties and functionalities for diverse and versatile applications with engineering, pharmaceutical, and medical potential. This technique for simple design to finely tune physicochemical properties adds a new angle to RNA nanotechnology.
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jnxybsf

金虫 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
chenglong9797: 金币+40, 翻译EPI+1, ★★★很有帮助, 谢谢!!! 2015-12-10 09:15:10
纳米技术的最新进展考虑到了不同纳米建构的合理设计。目前的方法利用天然RNA基序的保守角形成了特定尺寸的几何构型。人造RNA是由固定尺寸和角度的天然基序合成,而对于这些人造RNA不同尺寸的构建,上述方法的使用是有限的。它有助于解释RNA纳米颗粒中一段给定主序列造成的不同形状和尺寸。我们报道了一种用可调尺寸和稳定性构建RNA纳米颗粒的方法。多功能RNAsquares中有个90度角,该角是通过调整蛋白基序中3WJ形成的60度角得到的,此蛋白基序取自噬菌体 phi29 DNA packaging motor的pRNA。调整这些“中心”束,并根据预定的设计改变square的边长也可以容易地调整RNAsquare的物理化学性质和尺寸。已得到边长分别为5,10和20纳米的Square(样方?),每一个样方表现出不同的热力学和化学稳定性,从样方的四个角延伸出的“链”被用来结合 siRNA, ribozyme和 fluorogenic RNA motifs。3WJ先前存在的复杂性形成了独特的分子内接触,这就避免了由亲环或粘性末端导致的相对较弱的分子内反应。我们已经用3WJ基序通过一种分子设计技术组装了具有可控性质和功能的可变尺寸RNAsquare,它可被广泛用于工程、制药和医疗。通过简单设计改变其物理化学质,该技术为RNA纳米技术带来了新的视角。     外行  仅供参考  尽请指正
3楼2015-12-09 22:34:31
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disjustar

铁杆木虫 (正式写手)

利用天然的RNA结构域中的保守角,科学家已经掌握了很多实现RNA纳米建构的方法。依托这些前沿的RNA纳米技术,科学家们可以精确设计形成指定规格的空间几何体。
没事,翻译了第一句话……好难啊
2楼2015-12-09 11:19:01
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