Skip to main content

Advertisement

Log in

Transcriptome and growth efficiency comparisons of recombinant thermophiles that produce thermolabile and thermostable proteins: implications for burden-based selection of thermostable proteins

  • Original Paper
  • Published:
Extremophiles Aims and scope Submit manuscript

Abstract

Geobacillus kaustophilus is a thermophilic bacterium that grows at temperatures ranging between 42 and 74 °C. Here, we modified this organism to produce the thermolabile protein (PyrFA) or its thermostable variant (PyrFV) and analyzed the transcriptome and growth efficiency profiles of the resultant strains. In the producer of PyrFA, the transcriptome profile was changed to facilitate ATP synthesis from NADH without pooling reduced quinones. This change implies that PyrFA production at elevated temperatures places an energy burden on cells potentially to maintain protein homeostasis. This was consistent with the observation that the PyrFA producer grew slower than the PyrFV producer at > 45 °C and had a lower cellular fitness. Similar growth profiles were also observed in the PyrFA and PyrFV producers derived from another thermophile (Geobacillus thermodenitrificans) but not in those from Escherichia coli at 30 °C. Thus, we suggest that the production of thermolabile proteins impairs host survival at higher temperatures; therefore, thermophiles are under evolutionary selection for thermostable proteins regardless of whether their functions are associated with survival advantages. This hypothesis provides new insights into evolutionary protein selection in thermophiles and suggests an engineering approach to select thermostable protein variants generated via random gene mutagenesis.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

Download references

Acknowledgements

This work was supported by the following organizations: JSPS KAKENHI Grant Number 17K06925, the Institute for Fermentation, Osaka (IFO), and the Nagase Science and Technology Foundation.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Hirokazu Suzuki.

Additional information

Communicated by H. Atomi.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (PDF 112 KB)

Supplementary file2 (XLSX 530 KB)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Suzuki, H., Okumura, Y., Mikawa, Y. et al. Transcriptome and growth efficiency comparisons of recombinant thermophiles that produce thermolabile and thermostable proteins: implications for burden-based selection of thermostable proteins. Extremophiles 25, 403–412 (2021). https://doi.org/10.1007/s00792-021-01237-w

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00792-021-01237-w

Keywords

Navigation