Abundance of 4Feâ4S motifs in the genomes of methanogens and other prokaryotes
Abstract
The abundance of 4Fe-4S motifs of the form CX2CX2CX3C was analyzed in the open reading frames (ORFs) of 120 prokaryotic genomes. The abundance of ORFs containing the CX2CX2CX3C motif or isORFs correlated (r=0.82) with methanogenesis (p=0.0001), archaea (p=0.0173), anaerobiosis (p<0.0001) and genome size (p<0.0001). Optimal growth temperature (hyperthermophily) did not correlate with the number of isORFs (p=0.6283). Large numbers of CX2CX2CX3C motifs may be associated with unique physiologies: methanogenic archaea contained the greatest number of CX2CX2CX3C motifs found among the prokaryotic groups; however, only about 15% of the motifs were in genes directly involved in methanogenesis. Large numbers of CX2CX2CX3C motifs may also be associated with generalists such as Desulfitobacterium hafniense, which is an anaerobic bacterium containing multiple reductases.
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Among the 120 genomes sampled by Major et al., methanogens had by far the highest frequency of FeS proteins.
“Major et al. [165] found that among the 120 genomes sampled then, the methanogens had by far the highest frequency of FeS proteins.”
From Early bioenergetic evolution (2013) · cites this paper as [165]
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- Authors
- Major, T. A., Burd, H., & Whitman, W. B.
- Affiliations
- University of Georgia (US)
- Igenbio (United States) (US)
- Corresponding author
- Whitman, William B.
- ORCID
- Whitman, William B.
- Venue
- FEMS Microbiology Letters
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-10
- Volume
- 239
- Issue
- 1
- Pages
- 117-123
- ISSN
- 0378-1097 (ISSN-L)
- 1574-6968
- OpenAlex
- W2056437023
- Cited by
- 55
- References
- 0
- Citations by year
- 2026: 3 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 3 · 2018: 2 · 2017: 1 · 2016: 4 · 2014: 5 · 2013: 2 · 2012: 3
- FWCI
- 1.83
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- FEMS Microbiology Letters (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Metalloenzymes and iron-sulfur proteins
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
- Keywords
- methanogenic archaea, methanogenesis, archaea, anaerobic bacteria, open reading frames, genome size, Desulfitobacterium hafniense, reductase
- MeSH terms
- Anaerobiosis, Archaea, Bacteria, Hot Temperature, Iron-Sulfur Proteins, Methane, Phylogeny, Genome, Bacterial, Genome, Archaeal, Amino Acid Motifs, Genomics
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