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Combining nucleotide variations and structure variations for improving astaxanthin biosynthesis.

Jin Jin1,2, Bin Jia3,4, Ying-Jin Yuan1,2

  • 1Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.

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|May 8, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a new method, Combining Nucleotide variations And Structure variations (CNAS), to enhance astaxanthin production in yeast. CNAS simultaneously generates genetic and structural variations, significantly improving yields and revealing genotype-phenotype links.

Keywords:
ARTPAstaxanthinNucleotide variationsSCRaMbLEStructure variations

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Area of Science:

  • Synthetic biology
  • Metabolic engineering
  • Microbial strain development

Background:

  • Genome-wide variations are crucial for improving industrial microorganisms.
  • Existing methods lack efficiency in simultaneously generating structural and nucleotide variations.
  • Natural evolution utilizes both nucleotide and structural variations, suggesting their combined utility.

Purpose of the Study:

  • To develop a novel method, Combining Nucleotide variations And Structure variations (CNAS), for enhancing astaxanthin biosynthesis in yeast.
  • To combine Atmospheric and room temperature plasma (ARTP) with the Synthetic Chromosome Recombination and Modification by LoxP-Mediated Evolution (SCRaMbLE) system.
  • To investigate the simultaneous generation of structural and nucleotide variations for improved microbial performance.

Main Methods:

  • Application of the CNAS strategy to yeast strains for astaxanthin production.
  • Utilizing combinations of ARTP and SCRaMbLE for generating genomic variations.
  • Genetic analysis to identify specific mutations and structural variations responsible for yield improvement.

Main Results:

  • The CNAS method significantly increased astaxanthin yield by 2.2- and 7.0-fold in yeast.
  • CNAS successfully generated both structural variations (deletions, duplications, inversions) and nucleotide variations (SNPs, InDels) simultaneously.
  • Specific genetic alterations, including the deletion of YJR116W and the C2481G mutation in YOL084W, were identified as key contributors to enhanced astaxanthin yield.

Conclusions:

  • The CNAS strategy is effective in generating diverse genomic variations, leading to enhanced astaxanthin yield in yeast.
  • This approach provides a valuable tool for creating genomic diversity with desirable phenotypes.
  • The study elucidates genotype-to-phenotype relationships in yeast evolutionary processes.