Evidence map›Paper›PMID 26849746›Full record

ArticleCytoskeleton (Hoboken, N.J.)2016

Molecular evolution of troponin I and a role of its N-terminal extension in nematode locomotion.

Dawn E Barnes, Hyundoo Hwang, Kanako Ono, Hang Lu, Shoichiro Ono

Abstract read
In one paragraph

Article in Cytoskeleton (Hoboken, N.J.), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.1field-weighted citation impact, top 24% 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

13 citing papers in PubMed, 19 citations in OpenAlex.

  1. Article
  2. Article
  3. Identification and Characterization ofInternational journal of molecular sciences · 2025
    Article
  4. Article
  5. Article
  6. Imaging of Actin Cytoskeleton in the Nematode Caenorhabditis elegans.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Twitchin kinase inhibits muscle activity.Molecular biology of the cell · 2017
    Article
  13. 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

5 authors at 3 institutions in 2 countries.

Dawn E BarnesDepartment of Pathology and Department of Cell Biology, Emory University, Atlanta, Georgia.
Hyundoo HwangSchool of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia.
Kanako OnoDepartment of Pathology and Department of Cell Biology, Emory University, Atlanta, Georgia.
Hang LuSchool of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia.
Shoichiro OnoDepartment of Pathology and Department of Cell Biology, Emory University, Atlanta, Georgia.
Emory University · USGeorgia Institute of Technology · USTecnológico de Monterrey · MX

Funding

Enhancing and expanding the CGC Strain CollectionP40OD010440 · OD · UNIVERSITY OF MINNESOTA · PI Aric L Daul, Ann E. Rougvie · 2012 to 2026
$7.5M
Regulation of actin dynamics during myofibril assemblyR01AR048615 · NIAMS · EMORY UNIVERSITY · PI ONO, SHOICHIRO · 2002 to 2021
$6.2M
Quantitative microscopy-based rapid phenotyping and screeningR01GM088333 · NIGMS · GEORGIA INSTITUTE OF TECHNOLOGY · PI LU, HANG · 2011 to 2018
$2.3M
HIGH-THROUGHPUT HIGH-CONTENT PLATFORM FOR IMAGE-BASED SCREENSR21EB012803 · NIBIB · GEORGIA INSTITUTE OF TECHNOLOGY · PI LU, HANG · 2010 to 2011
$399k
NIAMS NIH HHS AR048615NIAMS NIH HHS R01 AR048615NIBIB NIH HHS EB012803NIBIB NIH HHS R21 EB012803NIGMS NIH HHS GM088333NIGMS NIH HHS R01 GM088333NIH HHS P40 OD010440
6 · The paper itself

Abstract

The troponin complex, composed of troponin T (TnT), troponin I (TnI), and troponin C (TnC), is the major calcium-dependent regulator of muscle contraction, which is present widely in both vertebrates and invertebrates. Little is known about evolutionary aspects of troponin in the animal kingdom. Using a combination of data mining and functional analysis of TnI, we report evidence that an N-terminal extension of TnI is present in most of bilaterian animals as a functionally important domain. Troponin components have been reported in species in most of representative bilaterian phyla. Comparison of TnI sequences shows that the core domains are conserved in all examined TnIs, and that N- and C-terminal extensions are variable among isoforms and species. In particular, N-terminal extensions are present in all protostome TnIs and chordate cardiac TnIs but lost in a subset of chordate TnIs including vertebrate skeletal-muscle isoforms. Transgenic rescue experiments in Caenorhabditis elegans striated muscle show that the N-terminal extension of TnI (UNC-27) is required for coordinated worm locomotion but not in sarcomere assembly and single muscle-contractility kinetics. These results suggest that N-terminal extensions of TnIs are retained from a TnI ancestor as a functional domain.

Indexed as

Caenorhabditis elegansCaenorhabditis elegans ProteinsEvolution, MolecularTroponin IAnimalsLocomotionMuscle ContractionSarcomeresCaenorhabditis elegans ProteinsTroponin Iactincontractionmusclemyosintroponin

Identifiers

PMID26849746
PMCPMC4846289
OpenAlexW2264953326

What OpenQuestion holds

Textmetadata
LicenceTDM
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.