Evidence map›Paper›PMID 14593205›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2003

Calcium-dependent molecular spring elements in the giant protein titin.

Dietmar Labeit, Kaori Watanabe, Christian Witt, Hideaki Fujita, Yiming Wu, Sunshine Lahmers, Theodor Funck, Siegfried Labeit, Henk Granzier

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 173 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
173citing papers in PubMed, 1 pooled it
–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

173 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. CaBiophysical journal · 2025
    Article
  11. Titin's Intrinsically Disordered PEVK Domain Modulates Actin Polymerization.International journal of molecular sciences · 2025
    Article
  12. Consecutive SSCs increase the SSC effect in skinned rat muscle fibres.Pflugers Archiv : European journal of physiology · 2025
    Article
  13. Article
  14. Article
  15. An integrated picture of the structural pathways controlling the heart performance.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  16. Article
  17. Article
  18. Case reports in genetics · 2024
    Article
  19. Review
  20. Article

113 more citing papers are in PubMed but not listed here.

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

9 authors.

Dietmar LabeitAnästhesiologie und Operative Intensivmedizin, Universitätsklinikum Mannheim, 68167 Mannheim, Germany.
Kaori Watanabe
Christian Witt
Hideaki Fujita
Yiming Wu
Sunshine Lahmers
Theodor Funck
Siegfried Labeit
Henk Granzier

Funding

Function of Giant Sarcomere Matrix Proteins in MuscleR01HL062881 · NHLBI · WASHINGTON STATE UNIVERSITY · PI GRANZIER, HENK L. · 1999 to 2018
$6.4M
TITIN AND HEART FUNCTION AND DISEASE (INDIVIDUAL)R01HL061497 · NHLBI · WASHINGTON STATE UNIVERSITY · PI GRANZIER, HENK L. · 1998 to 2007
$3.3M
NHLBI NIH HHS HL61497NHLBI NIH HHS HL62881NHLBI NIH HHS R01 HL061497NHLBI NIH HHS R01 HL062881
6 · The paper itself

Abstract

Titin (also known as connectin) is a giant protein with a wide range of cellular functions, including providing muscle cells with elasticity. Its physiological extension is largely derived from the PEVK segment, rich in proline (P), glutamate (E), valine (V), and lysine (K) residues. We studied recombinant PEVK molecules containing the two conserved elements: approximately 28-residue PEVK repeats and E-rich motifs. Single molecule experiments revealed that calcium-induced conformational changes reduce the bending rigidity of the PEVK fragments, and site-directed mutagenesis identified four glutamate residues in the E-rich motif that was studied (exon 129), as critical for this process. Experiments with muscle fibers showed that titin-based tension is calcium responsive. We propose that the PEVK segment contains E-rich motifs that render titin a calcium-dependent molecular spring that adapts to the physiological state of the cell.

Indexed as

Amino Acid MotifsAmino Acid SequenceCalciumConnectinExonsGene DeletionGlutamic AcidHumansLysineMolecular Sequence DataMuscle ProteinsMusclesMutagenesis, Site-DirectedProlineProtein ConformationProtein KinasesCalciumConnectinGlutamic AcidLysineMuscle ProteinsProlineProtein KinasesRecombinant ProteinsTTN protein, humanValine

Identifiers

PMID14593205
PMCPMC263879

What OpenQuestion holds

Textmetadata
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.