Evidence map›Paper›PMID 24974231›Full record

ArticleNature chemical biology2014

Calyculin biogenesis from a pyrophosphate protoxin produced by a sponge symbiont.

Toshiyuki Wakimoto, Yoko Egami, Yu Nakashima, Yukihiko Wakimoto, Takahiro Mori, Takayoshi Awakawa, Takuya Ito, Hiromichi Kenmoku, Yoshinori Asakawa, Jörn Piel and 1 more

Abstract read
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In one paragraph

Article in Nature chemical biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
14.2field-weighted citation impact, top 1% 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

51 citing papers in PubMed, 139 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 4 institutions in 2 countries.

Toshiyuki Wakimoto1] Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. [2] Japan Science and Technology Agency, CREST, Tokyo, Japan. [3].
Yoko Egami1] Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. [2] Japan Science and Technology Agency, CREST, Tokyo, Japan. [3].
Yu NakashimaGraduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.
Yukihiko WakimotoGraduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.
Takahiro Mori1] Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. [2] Japan Science and Technology Agency, CREST, Tokyo, Japan.
Takayoshi Awakawa1] Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. [2] Japan Science and Technology Agency, CREST, Tokyo, Japan.
Takuya ItoFaculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan.
Hiromichi KenmokuFaculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan.
Yoshinori AsakawaFaculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan.
Jörn PielInstitute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland.
Ikuro Abe1] Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. [2] Japan Science and Technology Agency, CREST, Tokyo, Japan.
The University of Tokyo · JPTokushima Bunri University · JPBoard of the Swiss Federal Institutes of Technology · CHJapan Science and Technology Agency · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Japanese marine sponge Discodermia calyx contains a major cytotoxic compound, calyculin A, which exhibits selective inhibition of protein phosphatases 1 and 2A. It has long been used as a chemical tool to evaluate intracellular signal transduction regulated by reversible protein phosphorylation. We describe the identification of the biosynthetic gene cluster of calyculin A by a metagenome mining approach. Single-cell analysis revealed that the gene cluster originates in the symbiont bacterium 'Candidatus Entotheonella' sp. A phosphotransferase encoded in the gene cluster deactivated calyculin A to produce a newly discovered diphosphate, which was actually the biosynthetic end product. The diphosphate had been previously overlooked because of the enzymatic dephosphorylation that occurred in response to sponge tissue disruption. Our work presents what is to our knowledge the first evidence for the biosynthetic process of calyculin A along with a notable phosphorylation-dephosphorylation mechanism to regulate toxicity, suggesting activated chemical defense in the most primitive of all multicellular animals.

Indexed as

AnimalsAntineoplastic AgentsDiphosphatesDrug Screening Assays, AntitumorHeLa CellsHumansLeukemiaMarine ToxinsMetagenomeMiceMolecular Sequence DataMultigene FamilyOrganophosphatesOxazolesPhosphorylationPhosphotransferasesAntineoplastic Agentscalyculin ADiphosphatesdiphosphoric acidMarine ToxinsOrganophosphatesOxazolesPhosphotransferasesPolyketide SynthasesRNA, Ribosomal, 16S

Identifiers

PMID24974231
OpenAlexW1975407624

What OpenQuestion holds

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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.