Evidence map›Paper›PMID 37653171›Full record

ArticleNature chemical biology2023

Hydroxytryptophan biosynthesis by a family of heme-dependent enzymes in bacteria.

Xinjie Shi, Guiyun Zhao, Hu Li, Zhijie Zhao, Wei Li, Miaolian Wu, Yi-Ling Du

Abstract read
PubMed Publisher
In one paragraph

Article in Nature chemical biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
5.8field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 38 citations in OpenAlex.

  1. Engineering a heme-dependent tryptophan hydroxylase pathway inSynthetic and systems biotechnology · 2026
    Article
  2. Article
  3. Discovery and Biosynthesis of the Novel Glycotetrapeptide Antibiotic Biffamycin A.Angewandte Chemie (International ed. in English) · 2026
    Article
  4. Article
  5. Article
  6. Paenidepsins are a Family of Lipopeptides fromJournal of natural products · 2026
    Article
  7. Article
  8. Review
  9. NADAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  10. Monooxygenase Activity of Indoleamine 2,3-Dioxygenase.Journal of the American Chemical Society · 2026
    Article
  11. Article
  12. Review
  13. Article
  14. Deciphering Tryptophan Oxygenation: Key Modulators of 2-Oxindole Formation in MarE.Angewandte Chemie (International ed. in English) · 2025
    Article
  15. Review
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

Xinjie Shi *The Fourth Affiliated Hospital and Department of Microbiology, School of Medicine, Zhejiang University, Hangzhou, China.
Guiyun Zhao *The Fourth Affiliated Hospital and Department of Microbiology, School of Medicine, Zhejiang University, Hangzhou, China.
Hu LiPolytechnic Institute, Zhejiang University, Hangzhou, China.
Zhijie ZhaoThe Fourth Affiliated Hospital and Department of Microbiology, School of Medicine, Zhejiang University, Hangzhou, China.
Wei LiThe Fourth Affiliated Hospital and Department of Microbiology, School of Medicine, Zhejiang University, Hangzhou, China.
Miaolian WuDepartment of Pharmacy, The Fourth Affiliated Hospital, School of Medicine, Zhejiang University, Yiwu, China.
Yi-Ling DuThe Fourth Affiliated Hospital and Department of Microbiology, School of Medicine, Zhejiang University, Hangzhou, China. yldu@zju.edu.cn.ORCID 0000-0001-7072-4803
Zhejiang University · CNHangzhou Wanxiang Polytechnic · CNShandong University · CN

Funding

National Natural Science Foundation of China (National Science Foundation of China) 32122005
6 · The paper itself

Abstract

Hydroxytryptophan serves as a chemical precursor to a variety of bioactive specialized metabolites, including the human neurotransmitter serotonin and the hormone melatonin. Although the human and animal routes to hydroxytryptophan have been known for decades, how bacteria catalyze tryptophan indole hydroxylation remains a mystery. Here we report a class of tryptophan hydroxylases that are involved in various bacterial metabolic pathways. These enzymes utilize a histidine-ligated heme cofactor and molecular oxygen or hydrogen peroxide to catalyze regioselective hydroxylation on the tryptophan indole moiety, which is mechanistically distinct from their animal counterparts from the nonheme iron enzyme family. Through genome mining, we also identify members that can hydroxylate the tryptophan indole ring at alternative positions. Our results not only reveal a conserved way to synthesize hydroxytryptophans in bacteria but also provide a valuable enzyme toolbox for biocatalysis. As proof of concept, we assemble a highly efficient pathway for melatonin in a bacterial host.

Indexed as

5-HydroxytryptophanMelatoninAnimalsBacteriaHemeHumansTryptophan5-HydroxytryptophanHemeMelatoninTryptophan

Identifiers

PMID37653171
OpenAlexW4386332517

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.