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Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
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Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
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Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
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Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
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Engineering functional thermostable proteins using ancestral sequence reconstruction.

Raine E S Thomson1, Saskya E Carrera-Pacheco2, Elizabeth M J Gillam1

  • 1School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.

The Journal of Biological Chemistry
|August 30, 2022
PubMed
Summary
This summary is machine-generated.

Engineering proteins for enhanced stability is crucial for various applications. Ancestral sequence reconstruction offers a promising bioinspired method to create highly stable protein folds.

Keywords:
ancestral sequence reconstructionbiocatalysiscytochrome P450directed evolutionmolecular evolutionprecambrianprotein engineeringsynthetic biologythermostability

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Area of Science:

  • Biochemistry and Molecular Biology
  • Protein Engineering
  • Bioinformatics

Background:

  • Proteins naturally exhibit limited stability, making them susceptible to unfolding under environmental stress.
  • Thermostable proteins are essential for industrial processes, therapeutics, synthetic biology, and research.
  • Current engineering methods like rational design and directed evolution have limitations.

Purpose of the Study:

  • To review methods for engineering protein thermostability.
  • To highlight the potential of ancestral sequence reconstruction (ASR) for creating stable proteins.
  • To discuss factors influencing successful ASR for thermostability.

Main Methods:

  • Phylogenetic analysis of protein sequence data.
  • Bioinformatic tools for ancestral sequence reconstruction.
  • Leveraging large-scale sequence databases.

Main Results:

  • ASR can generate highly stable protein folds.
  • This approach bypasses limitations of rational design and directed evolution.
  • ASR provides insights into the determinants of protein stability.

Conclusions:

  • Ancestral sequence reconstruction is a powerful bioinspired strategy for engineering thermostable proteins.
  • This technique has broad applications in industrial chemistry, medicine, and synthetic biology.
  • Understanding ASR factors is key to unlocking novel protein functionalities.