Daniel Schindler, Roy S K Walker, Shuangying Jiang, Aaron N Brooks, Yun Wang, Carolin A Müller, Charlotte Cockram, Yisha Luo, Alicia García, Daniel Schraivogel, Julien Mozziconacci, Noah Pena, Mahdi Assari, María Del Carmen Sánchez Olmos, Yu Zhao, Alba Ballerini, Benjamin A Blount, Jitong Cai, Lois Ogunlana, Wei Liu, Katarina Jönsson, Dariusz Abramczyk, Eva Garcia-Ruiz, Tomasz W Turowski, Reem Swidah, Tom Ellis, Tao Pan, Francisco Antequera, Yue Shen, Conrad A Nieduszynski, Romain Koszul, Junbiao Dai, Lars M Steinmetz, Jef D Boeke, Yizhi Cai
Here, we report the design, construction, and characterization of a tRNA neochromosome, a designer chromosome that functions as an additional, de novo counterpart to the native complement of Saccharomyces cerevisiae. Intending to address one of the central design principles of the Sc2.0 project, the ∼190-kb tRNA neochromosome houses all 275 relocated nuclear tRNA genes. To maximize stability, the design incorporates orthogonal genetic elements from non-S. cerevisiae yeast species. Furthermore, the presence of 283 rox recombination sites enables an orthogonal tRNA SCRaMbLE system...
November 22, 2023: Cell