Evidence map›Paper›PMID 28435864›Full record

ArticleScience advances2017

Microbial arms race: Ballistic "nematocysts" in dinoflagellates represent a new extreme in organelle complexity.

Gregory S Gavelis, Kevin C Wakeman, Urban Tillmann, Christina Ripken, Satoshi Mitarai, Maria Herranz, Suat Özbek, Thomas Holstein, Patrick J Keeling, Brian S Leander

Open access · goldAbstract read
In one paragraph

Article in Science advances, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
2.1field-weighted citation impact, top 12% 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

16 citing papers in PubMed, 51 citations in OpenAlex.

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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

10 authors at 5 institutions in 3 countries.

Gregory S GavelisDepartment of Botany, University of British Columbia, Vancouver, Canada.
Kevin C WakemanOffice of International Affairs, Hokkaido University, Kita 10, Nishi 8, Sapporo 060-0810, Japan.
Urban TillmannFaculty of Science, Hokkaido University, Kita 10, Nishi 8, Sapporo 060-0810, Japan.
Christina RipkenMarine Biophysics Unit, Okinawa Institute of Science and Technology, Okinawa, Japan.
Satoshi MitaraiMarine Biophysics Unit, Okinawa Institute of Science and Technology, Okinawa, Japan.
Maria HerranzDepartment of Botany, University of British Columbia, Vancouver, Canada.
Suat ÖzbekCentre for Organismal Studies, University of Heidelberg, Heidelberg, Germany.
Thomas HolsteinCentre for Organismal Studies, University of Heidelberg, Heidelberg, Germany.ORCID 0000-0003-0480-4674
Patrick J KeelingDepartment of Botany, University of British Columbia, Vancouver, Canada.
Brian S LeanderDepartment of Botany, University of British Columbia, Vancouver, Canada.
University of British Columbia · CAHeidelberg University · DEOkinawa Institute of Science and Technology Graduate University · JPAlfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung · DEHokkaido University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We examine the origin of harpoon-like secretory organelles (nematocysts) in dinoflagellate protists. These ballistic organelles have been hypothesized to be homologous to similarly complex structures in animals (cnidarians); but we show, using structural, functional, and phylogenomic data, that nematocysts evolved independently in both lineages. We also recorded the first high-resolution videos of nematocyst discharge in dinoflagellates. Unexpectedly, our data suggest that different types of dinoflagellate nematocysts use two fundamentally different types of ballistic mechanisms: one type relies on a single pressurized capsule for propulsion, whereas the other type launches 11 to 15 projectiles from an arrangement similar to a Gatling gun. Despite their radical structural differences, these nematocysts share a single origin within dinoflagellates and both potentially use a contraction-based mechanism to generate ballistic force. The diversity of traits in dinoflagellate nematocysts demonstrates a stepwise route by which simple secretory structures diversified to yield elaborate subcellular weaponry.

Indexed as

DinoflagellidaOrganellesAnimalsPhylogenycnidocystConvergent evolutionextrusomeminicollagenmucocystred queensecretionsecretorytrichocyst

Identifiers

PMID28435864
PMCPMC5375639
OpenAlexW2607096728

What OpenQuestion holds

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LicenceCC BY-NC
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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.