Deep functional analysis of synII, a 770 kb synthetic yeast chromosome. Saccharomyces cerevisiae

Herein we report the successful design, construction and characterization of a 770 kb synthetic yeast chromosome II (synII). Our study incorporates characterization at multiple levels, including phenomics, transcriptomics, proteomics, chromosome segregation and replication analysis to provide the most thorough and comprehensive analysis of a synthetic chromosome. Our “Trans-Omics” analyses reveal a modest but potentially significant pervasive up-regulation of translational machinery observed in synII is mainly caused by the deletion of 13 tRNAs. By both complementation assays and SCRaMbLE, we targeted and debuged the origin of a growth defect at 37°C in glycerol medium, which is related to misregulation of the HOG response. Despite the subtle differences, the synII strain shows highly consistent biological processes comparable to the native strain. Overall design: Measurement of genome replication timing from a S. cerevisiae yeast strain with a 770 kb synthetic yeast chromosome II (synII). Two samples were analysed: a replicating sample (from S phase) and a non-replicating sample (from G2 phase).