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Title: Identifying the metabolic differences of a fast-growth phenotype in Synechococcus UTEX 2973

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep41569· OSTI ID:1347426
 [1];  [2];  [2];  [1]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Washington Univ., St. Louis, MO (United States)

The photosynthetic capabilities of cyanobacteria make them interesting candidates for industrial bioproduction. One obstacle to large-scale implementation of cyanobacteria is their limited growth rates as compared to industrial mainstays. Synechococcus UTEX 2973, a strain closely related to Synechococcus PCC 7942, was recently identified as having the fastest measured growth rate among cyanobacteria. To facilitate the development of 2973 as a model organism we developed in this study the genome-scale metabolic model iSyu683. Experimental data were used to define CO2 uptake rates as well as the biomass compositions for each strain. The inclusion of constraints based on experimental measurements of CO2 uptake resulted in a ratio of the growth rates of Synechococcus 2973 to Synechococcus 7942 of 2.03, which nearly recapitulates the in vivo growth rate ratio of 2.13. This identified the difference in carbon uptake rate as the main factor contributing to the divergent growth rates. Additionally four SNPs were identified as possible contributors to modified kinetic parameters of metabolic enzymes and candidates for further study. As a result, comparisons against more established cyanobacterial strains identified a number of differences between the strains along with a correlation between the number of cytochrome c oxidase operons and heterotrophic or diazotrophic capabilities.

Research Organization:
Washington Univ., St. Louis, MO (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012722
OSTI ID:
1347426
Journal Information:
Scientific Reports, Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (9)

Comparative genomics reveals the molecular determinants of rapid growth of the cyanobacterium Synechococcus elongatus UTEX 2973 journal November 2018
Navigating the fitness landscape using multiallele genome editing journal November 2018
Carbon recycling by cyanobacteria: improving CO2 fixation through chemical production journal August 2017
Deciphering cyanobacterial phenotypes for fast photoautotrophic growth via isotopically nonstationary metabolic flux analysis journal November 2017
The primary transcriptome of the fast-growing cyanobacterium Synechococcus elongatus UTEX 2973 journal August 2018
New Applications of Synthetic Biology Tools for Cyanobacterial Metabolic Engineering journal February 2019
Emerging Species and Genome Editing Tools: Future Prospects in Cyanobacterial Synthetic Biology journal September 2019
Quantitative insights into the cyanobacterial cell economy journal February 2019
State-of-the-Art Genetic Modalities to Engineer Cyanobacteria for Sustainable Biosynthesis of Biofuel and Fine-Chemicals to Meet Bio–Economy Challenges journal June 2019