利用代谢工程将分子生物学技术与社会挑战相联系。
Using Metabolic Engineering to Connect Molecular Biology Techniques to Societal Challenges.
作者信息
Gordy Claire L, Goller Carlos C
机构信息
Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States.
Biotechnology Teaching Program, North Carolina State University, Raleigh, NC, United States.
出版信息
Front Microbiol. 2020 Nov 16;11:577004. doi: 10.3389/fmicb.2020.577004. eCollection 2020.
Genetically modified organisms (GMOs) are a topic of broad interest and are discussed in classes ranging from introductory biology to bioethics to more advanced methods-focused molecular biology courses. In most cases, GMOs are discussed in the context of introducing a single protein-coding gene to produce a single desired trait in a crop. For example, a commercially available kit allows students to test whether food products contain GMOs by detecting the delta-endotoxin gene, which confers resistance to European corn borers. We have developed an 8-week laboratory module for upper-division undergraduates and graduate students that builds upon students' basic understanding of GMOs to introduce them to the techniques used to sustainably produce commercially valuable products in yeast through metabolic engineering. In this course, students use recombination-based methods to assemble genes encoding entire metabolic pathways in , perform genetic screens to identify yeast genes that impact metabolite yield, and use error-prone PCR to optimize metabolic pathway function. In parallel to these laboratory-based activities, students engage with the societal impact of these approaches through case studies of products made via yeast metabolic engineering, such as opioids, omega-3 fatty acids, and the Impossible Burger. In this report, we focus on these case studies as well as an individual sustainability project assignment created for this course. This assignment, which spans the 8-week module, asks students to find examples of yeast metabolic engineering that could be used to address current sustainability challenges in their communities. By the end of the course, students synthesize this information to create a case study that could be used to teach concepts related to metabolic engineering and sustainability to their peers. Student approaches to this project have varied from literature reviews, to news searches, to directly contacting and interviewing researchers using novel metabolic engineering approaches. These student-produced projects are used as case studies in future semesters, amplifying student voices and contributing to student ownership. While developed in the context of this course, the sustainability project and case studies are broadly applicable and could be adapted for use in biology or bioethics courses at the undergraduate or graduate level. Through this report, we hope to gain collaborators interested in implementing a version of the course at their institutions, allowing for robust assessment of the impact of the course on a larger group of students.
转基因生物(GMOs)是一个广受关注的话题,在从基础生物学、生物伦理学到更高级的以方法为重点的分子生物学课程等各类课程中都有讨论。在大多数情况下,讨论转基因生物是在向作物中引入单个蛋白质编码基因以产生单一期望性状的背景下进行的。例如,一种市售试剂盒可让学生通过检测赋予欧洲玉米螟抗性的δ-内毒素基因来测试食品是否含有转基因生物。我们为高年级本科生和研究生开发了一个为期8周的实验室模块,该模块基于学生对转基因生物的基本理解,向他们介绍通过代谢工程在酵母中可持续生产具有商业价值产品所使用的技术。在本课程中,学生使用基于重组的方法在酵母中组装编码整个代谢途径的基因,进行遗传筛选以鉴定影响代谢物产量的酵母基因,并使用易错PCR来优化代谢途径功能。与这些基于实验室的活动并行,学生通过酵母代谢工程生产的产品(如阿片类药物、ω-3脂肪酸和人造肉汉堡)的案例研究,来了解这些方法对社会的影响。在本报告中,我们重点关注这些案例研究以及为该课程创建的一个个人可持续发展项目作业。这个作业贯穿为期8周的模块,要求学生寻找酵母代谢工程的实例,这些实例可用于应对他们所在社区当前面临的可持续发展挑战。在课程结束时,学生综合这些信息来创建一个案例研究,可用于向同龄人传授与代谢工程和可持续发展相关的概念。学生完成这个项目的方式各不相同,从文献综述、新闻搜索到直接联系和采访采用新型代谢工程方法的研究人员。这些学生制作的项目在未来学期用作案例研究,放大了学生的声音并促进了学生的自主参与。虽然这个可持续发展项目和案例研究是在本课程的背景下开发的,但它们具有广泛的适用性,可适用于本科或研究生水平的生物学或生物伦理课程。通过本报告,我们希望吸引有兴趣在其所在机构实施该课程版本的合作者,以便对该课程对更多学生的影响进行有力评估。
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