Cited by 56Metalloenzymes and iron-sulfur proteinsMicrobial metabolism and enzyme functionAnaerobic Digestion and Biogas Production

Cloning and expression of the gene cluster encoding key proteins involved in acetyl-CoA synthesis in Clostridium thermoaceticum: CO dehydrogenase, the corrinoid/Fe-S protein, and methyltransferase

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Roberts, D L, James-Hagstrom, J E, Garvin, D K, Gorst, C M, Runquist, J A, Baur, J R, Haase, F C, Ragsdale, S W·1989·Proceedings of the National Academy of Sciences

Abstract

Acetogenic bacteria fix CO or CO2 by a pathway of autotrophic growth called the acetyl-CoA (or Wood) pathway. Key enzymes in the pathway are a methyltransferase, a corrinoid/Fe-S protein, a disulfide reductase, and a carbon monoxide dehydrogenase. This manuscript describes the isolation of the genes that code for the methyltransferase, the two subunits of the corrinoid/Fe-S protein, and the two subunits of carbon monoxide dehydrogenase. These five genes were found to be clustered within an approximately 10-kilobase segment on the Clostridium thermoaceticum genome. The proteins were expressed at up to 5-10% of Escherichia coli cell protein, and isopropyl beta-D-thiogalactopyranoside had no effect on the levels of expression, implying that the C. thermoaceticum inserts contained transcriptional and translational signals that were recognized by E. coli. The methyltransferase is expressed in E. coli in a fully active dimeric form with a specific activity and heat stability similar to the enzyme expressed in C. thermoaceticum. However, both the corrinoid/Fe-S protein and carbon dioxide dehydrogenase, although expressed in high amounts and with identical subunit molecular weights in E. coli, are inactive and less heat stable than are the native enzymes from C. thermoaceticum.

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Crossref · 10.1073/pnas.86.1.32

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Authors
Roberts, D. L., James-Hagstrom, J. E., Garvin, D. K., Gorst, C. M., Runquist, J. A., Baur, J. R., Haase, F. C., & Ragsdale, S. W.
Affiliations
University of Wisconsin–Milwaukee (US)
Venue
Proceedings of the National Academy of Sciences
Published
1989-01
Volume
86
Issue
1
Pages
32-36
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2022642835
Cited by
56
References
28
Citations by year
2024: 1 · 2023: 1 · 2021: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 3 · 2013: 1 · 2012: 1
FWCI
7.00
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r29gm039451-02)
  • National Institute of General Medical Sciences (1-R29-GM39451)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Metalloenzymes and iron-sulfur proteins
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial metabolism and enzyme function
  • Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
Keywords
Clostridium thermoaceticum, acetyl-CoA biosynthesis, acetogenic bacteria, gene clusters, carbon monoxide dehydrogenase, methyltransferase, heterologous expression in Escherichia coli, enzyme thermostability, enzyme activity
MeSH terms
Acetyl Coenzyme A, Aldehyde Oxidoreductases, Amino Acid Sequence, Clostridium, DNA, Bacterial, Genes, Genes, Bacterial, Multigene Family, Iron-Sulfur Proteins, Metalloproteins, Methyltransferases, Molecular Sequence Data, Multienzyme Complexes, Nucleic Acid Hybridization, Plasmids, Vitamin B 12, Restriction Mapping, Corrinoids

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