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Restricted Distribution of the Butyrate Kinase Pathway among Butyrate-Producing Bacteria from the Human Colon

Open access
Louis, Petra, Duncan, Sylvia H., McCrae, Sheila I., Millar, Jacqueline, Jackson, Michelle S., Flint, Harry J.·2004·Journal of Bacteriology

Abstract

The final steps in butyrate synthesis by anaerobic bacteria can occur via butyrate kinase and phosphotransbutyrylase or via butyryl-coenzyme A (CoA):acetate CoA-transferase. Degenerate PCR and enzymatic assays were used to assess the presence of butyrate kinase among 38 anaerobic butyrate-producing bacterial isolates from human feces that represent three different clostridial clusters (IV, XIVa, and XVI). Only four strains were found to possess detectable butyrate kinase activity. These were also the only strains to give PCR products (verifiable by sequencing) with degenerate primer pairs designed within the butyrate kinase gene or between the linked butyrate kinase/phosphotransbutyrylase genes. Further analysis of the butyrate kinase/phosphotransbutyrylase genes of one isolate, L2-50, revealed similar organization to that described previously from different groups of clostridia, along with differences in flanking sequences and phylogenetic relationships. Butyryl-CoA:acetate CoA-transferase activity was detected in all 38 strains examined, suggesting that it, rather than butyrate kinase, provides the dominant route for butyrate formation in the human colonic ecosystem that contains a constantly high concentration of acetate.

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Crossref · 10.1128/jb.186.7.2099-2106.2004

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Authors
Louis, P., Duncan, S. H., McCrae, S. I., Millar, J., Jackson, M. S., & Flint, H. J.
Venue
Journal of Bacteriology
Published
2004-04
Volume
186
Issue
7
Pages
2099-2106
ISSN
  • 0021-9193 (ISSN-L)
  • 1098-5530
OpenAlex
W2105388729
Cited by
513
References
0
FWCI
2.84
Type
journal article
Language
en
Open access
green

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