Synthesis, debugging, and effects of synthetic chromosome consolidation: synVI and beyond

Science. 2017 Mar 10;355(6329):eaaf4831. doi: 10.1126/science.aaf4831.


We describe design, rapid assembly, and characterization of synthetic yeast Sc2.0 chromosome VI (synVI). A mitochondrial defect in the synVI strain mapped to synonymous coding changes within PRE4 (YFR050C), encoding an essential proteasome subunit; Sc2.0 coding changes reduced Pre4 protein accumulation by half. Completing Sc2.0 specifies consolidation of 16 synthetic chromosomes into a single strain. We investigated phenotypic, transcriptional, and proteomewide consequences of Sc2.0 chromosome consolidation in poly-synthetic strains. Another "bug" was discovered through proteomic analysis, associated with alteration of the HIS2 transcription start due to transfer RNA deletion and loxPsym site insertion. Despite extensive genetic alterations across 6% of the genome, no major global changes were detected in the poly-synthetic strain "omics" analyses. This work sets the stage for completion of a designer, synthetic eukaryotic genome.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Artificial Cells / metabolism
  • Chromosomes, Artificial, Yeast / chemistry*
  • Chromosomes, Artificial, Yeast / genetics*
  • Physical Chromosome Mapping
  • Proteasome Endopeptidase Complex / genetics
  • Proteomics
  • Saccharomyces cerevisiae / genetics*
  • Saccharomyces cerevisiae / growth & development
  • Saccharomyces cerevisiae Proteins / genetics
  • Synthetic Biology / methods*


  • Saccharomyces cerevisiae Proteins
  • PRE4 protein, S cerevisiae
  • Proteasome Endopeptidase Complex