Evidence map›Paper›PMID 25730548›Full record

ArticleNature chemical biology2015

An enzymatic [4+2] cyclization cascade creates the pentacyclic core of pyrroindomycins.

Zhenhua Tian, Peng Sun, Yan Yan, Zhuhua Wu, Qingfei Zheng, Shuaixiang Zhou, Hua Zhang, Futao Yu, Xinying Jia, Dandan Chen and 3 more

Abstract read
PubMed Publisher
In one paragraph

Article in Nature chemical biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
–field-weighted citation impact
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

48 citing papers in PubMed.

  1. Review
  2. Article
  3. The Diels-Alder Reaction as a Key Step in Natural Product Synthesis.Progress in the chemistry of organic natural products · 2026
    Review
  4. Article
  5. Article
  6. Article
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  17. Computational Investigation of the Mechanism of Diels-Alderase PyrI4.Journal of the American Chemical Society · 2020
    Article
  18. Article
  19. Article
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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

13 authors.

Zhenhua TianState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Peng Sun1] State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China. [2] Research Center for Marine Drugs, School of Pharmacy, Second Military Medical University, Shanghai, China.
Yan YanState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Zhuhua WuState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Qingfei ZhengState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Shuaixiang ZhouState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Hua ZhangState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Futao YuState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
Xinying JiaState Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.ORCID 0000000228314605
Dandan ChenHuzhou Center of Bio-Synthetic Innovation, Huzhou, China.
Attila MándiDepartment of Organic Chemistry, University of Debrecen, Debrecen, Hungary.
Tibor KurtánDepartment of Organic Chemistry, University of Debrecen, Debrecen, Hungary.
Wen Liu1] State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China. [2] Huzhou Center of Bio-Synthetic Innovation, Huzhou, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The [4+2] cycloaddition remains one of the most intriguing transformations in synthetic and natural products chemistry. In nature, however, there are remarkably few enzymes known to have this activity. We herein report an unprecedented enzymatic [4+2] cyclization cascade that has a central role in the biosynthesis of pyrroindomycins, which are pentacyclic spirotetramate natural products. Beginning with a linear intermediate that contains two pairs of 1,3-diene and alkene groups, the dedicated cyclases PyrE3 and PyrI4 act in tandem to catalyze the formation of two cyclohexene rings in the dialkyldecalin system and the tetramate spiro-conjugate of the molecules. The two cyclizations are completely enzyme dependent and proceed in a regio- and stereoselective manner to establish the enantiomerically pure pentacyclic core. Analysis of a related spirotetronate pathway confirms that homologs are functionally exchangeable, establishing the generality of these findings and explaining how nature creates diverse active molecules with similar rigid scaffolds.

Indexed as

AlkenesBiological ProductsCatalysisChemistryCyclizationCyclohexenesDNA, BacterialIntramolecular LyasesMacrolidesModels, ChemicalMolecular StructureMutationPlasmidsPyrrolidinonesRecombinant ProteinsStereoisomerismAlkenesBiological ProductsCyclohexenesDNA, BacterialIntramolecular LyasesMacrolidesPyrrolidinonesRecombinant Proteins

Identifiers

PMID25730548

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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.