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A gut bacterial pathway metabolizes aromatic amino acids into nine circulating metabolites

Overview of attention for article published in Nature, November 2017
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (98th percentile)
  • Good Attention Score compared to outputs of the same age and source (67th percentile)

Mentioned by

1 news outlet
1 blog
296 tweeters
8 Facebook pages
2 Google+ users
1 Redditor


73 Dimensions

Readers on

408 Mendeley
4 CiteULike
A gut bacterial pathway metabolizes aromatic amino acids into nine circulating metabolites
Published in
Nature, November 2017
DOI 10.1038/nature24661
Pubmed ID

Dylan Dodd, Matthew H. Spitzer, William Van Treuren, Bryan D. Merrill, Andrew J. Hryckowian, Steven K. Higginbottom, Anthony Le, Tina M. Cowan, Garry P. Nolan, Michael A. Fischbach, Justin L. Sonnenburg


The human gut microbiota produces dozens of metabolites that accumulate in the bloodstream, where they can have systemic effects on the host. Although these small molecules commonly reach concentrations similar to those achieved by pharmaceutical agents, remarkably little is known about the microbial metabolic pathways that produce them. Here we use a combination of genetics and metabolic profiling to characterize a pathway from the gut symbiont Clostridium sporogenes that generates aromatic amino acid metabolites. Our results reveal that this pathway produces twelve compounds, nine of which are known to accumulate in host serum. All three aromatic amino acids (tryptophan, phenylalanine and tyrosine) serve as substrates for the pathway, and it involves branching and alternative reductases for specific intermediates. By genetically manipulating C. sporogenes, we modulate serum levels of these metabolites in gnotobiotic mice, and show that in turn this affects intestinal permeability and systemic immunity. This work has the potential to provide the basis of a systematic effort to engineer the molecular output of the gut bacterial community.

Twitter Demographics

The data shown below were collected from the profiles of 296 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 408 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 408 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 112 27%
Researcher 96 24%
Unspecified 54 13%
Student > Master 45 11%
Student > Bachelor 33 8%
Other 68 17%
Readers by discipline Count As %
Agricultural and Biological Sciences 124 30%
Biochemistry, Genetics and Molecular Biology 87 21%
Unspecified 64 16%
Immunology and Microbiology 54 13%
Medicine and Dentistry 26 6%
Other 53 13%

Attention Score in Context

This research output has an Altmetric Attention Score of 175. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 31 May 2018.
All research outputs
of 12,835,821 outputs
Outputs from Nature
of 66,996 outputs
Outputs of similar age
of 387,656 outputs
Outputs of similar age from Nature
of 667 outputs
Altmetric has tracked 12,835,821 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 66,996 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 73.6. This one has done well, scoring higher than 89% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 387,656 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 667 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 67% of its contemporaries.