Evidence map›Paper›PMID 26650356›Full record

ArticleeLife2015

A K(+)-selective CNG channel orchestrates Ca(2+) signalling in zebrafish sperm.

Sylvia Fechner, Luis Alvarez, Wolfgang Bönigk, Astrid Müller, Thomas K Berger, Rene Pascal, Christian Trötschel, Ansgar Poetsch, Gabriel Stölting, Kellee R Siegfried and 3 more

Open access · goldAbstract read
In one paragraph

Article in eLife, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
3.6field-weighted citation impact, top 7% 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

29 citing papers in PubMed, 1 synthesis or guideline pooled it, 55 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Soluble adenylyl cyclase in nonmammalian sperm is directly controlled by pH, not by HCOProceedings of the National Academy of Sciences of the United States of America · 2026
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  16. Reconstruction of the birth of a male sex chromosome present in Atlantic herring.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  17. A family of hyperpolarization-activated channels selective for protons.Proceedings of the National Academy of Sciences of the United States of America · 2020
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  18. Review
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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 at 4 institutions in 2 countries.

Sylvia FechnerAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Luis AlvarezAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Wolfgang BönigkAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Astrid MüllerAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Thomas K BergerAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Rene PascalAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Christian TrötschelLehrstuhl Biochemie der Pflanzen, Ruhr-Universität Bochum, Bochum, Germany.
Ansgar PoetschLehrstuhl Biochemie der Pflanzen, Ruhr-Universität Bochum, Bochum, Germany.
Gabriel StöltingInstitute of Complex Systems 4, Forschungszentrum Jülich, Jülich, Germany.ORCID http://orcid.org/0000-0002-2339-0545
Kellee R SiegfriedBiology Department, University of Massachusetts Boston, Boston, United States.
Elisabeth KremmerInstitut für Molekulare Immunologie, Helmholtz-Zentrum München, München, Germany.
Reinhard SeifertAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
U Benjamin KauppAbteilung Molekulare Neurosensorik, Center of Advanced European Studies and Research, Bonn, Germany.
Center of Advanced European Studies and Research · DEBoston University · USForschungszentrum Jülich · DEHelmholtz Zentrum München · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Calcium in the flagellum controls sperm navigation. In sperm of marine invertebrates and mammals, Ca(2+) signalling has been intensely studied, whereas for fish little is known. In sea urchin sperm, a cyclic nucleotide-gated K(+) channel (CNGK) mediates a cGMP-induced hyperpolarization that evokes Ca(2+) influx. Here, we identify in sperm of the freshwater fish Danio rerio a novel CNGK family member featuring non-canonical properties. It is located in the sperm head rather than the flagellum and is controlled by intracellular pH, but not cyclic nucleotides. Alkalization hyperpolarizes sperm and produces Ca(2+) entry. Ca(2+) induces spinning-like swimming, different from swimming of sperm from other species. The "spinning" mode probably guides sperm into the micropyle, a narrow entrance on the surface of fish eggs. A picture is emerging of sperm channel orthologues that employ different activation mechanisms and serve different functions. The channel inventories probably reflect adaptations to species-specific challenges during fertilization.

Indexed as

Calcium SignalingAnimalsCyclic Nucleotide-Gated Cation ChannelsMalePotassiumSpermatozoaZebrafishCyclic Nucleotide-Gated Cation ChannelsPotassiumbiophysicscell biologyfertilizationpotassium channelsperm signallingstructural biologyzebrafish

Identifiers

PMID26650356
PMCPMC4749565
OpenAlexW2238493641

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.