Abstract
Alkalinicity presents a challenge for life due to a “reversed” proton gradient that is unfavourable to many bioenergetic processes across the membranes of microorganisms. Despite this, many bacteria, archaea, and eukaryotes, collectively termed alkaliphiles, are adapted to life in alkaline ecosystems and are of great scientific and biotechnological interest due to their niche specialization and ability to produce highly stable enzymes. Advances in next-generation sequencing technologies have propelled not only the genomic characterization of many alkaliphilic microorganisms that have been isolated from nature alkaline sources but also our understanding of the functional relationships between different taxa in microbial communities living in these ecosystems. In this review, we discuss the genetics and molecular biology of alkaliphiles from an “omics” point of view, focusing on how metagenomics and transcriptomics have contributed to our understanding of these extremophiles.
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Abbreviations
- ATP:
-
Adenosine triphosphate
- CDS:
-
Coding sequence
- DNA:
-
Deoxyribonucleic acid
- FAD:
-
Flavin adenine dinucleotide
- JGI:
-
Joint Genome Institute
- KOGs:
-
Eukaryotic Orthologous Groups
- Mb:
-
Mega base pairs
- mV:
-
Millivolts
- NAD(P)H:
-
Nicotinamide adenine dinucleotide phosphate (reduced form)
- NADH:
-
Nicotinamide adenine dinucleotide (reduced form)
- pI:
-
Isoelectric point
- PMF:
-
Proton motive force
- PP:
-
Pentose phosphate
- SMF:
-
Sodium motive force
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The authors wish to thank the University of Pretoria and the National Research Foundation of South Africa for financial support.
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Lebre, P.H., Cowan, D.A. (2019). Genomics of Alkaliphiles. In: Mamo, G., Mattiasson, B. (eds) Alkaliphiles in Biotechnology. Advances in Biochemical Engineering/Biotechnology, vol 172. Springer, Cham. https://doi.org/10.1007/10_2018_83
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