Evidence map›Paper›PMID 26331261›Full record

ArticleBiophysical journal2015

Slow Internal Dynamics and Charge Expansion in the Disordered Protein CGRP: A Comparison with Amylin.

Sara M Sizemore, Stephanie M Cope, Anindya Roy, Giovanna Ghirlanda, Sara M Vaiana

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Biophysical journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
  2. Mapping Charge Interactions in Intrinsically Disordered Proteins.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
  3. Article
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  6. HYPK: A marginally disordered protein sensitive to charge decoration.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
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  16. Review
  17. Integrated view of internal friction in unfolded proteins from single-molecule FRET, contact quenching, theory, and simulations.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  18. Article
  19. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Sara M SizemoreCenter for Biological Physics, Arizona State University, Tempe, Arizona; Department of Physics, Arizona State University, Tempe, Arizona.
Stephanie M CopeCenter for Biological Physics, Arizona State University, Tempe, Arizona; Department of Physics, Arizona State University, Tempe, Arizona.
Anindya RoyDepartment of Biochemistry, Molecular Engineering and Sciences, University of Washington, Seattle, Washington.
Giovanna GhirlandaDepartment of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona.
Sara M VaianaCenter for Biological Physics, Arizona State University, Tempe, Arizona; Department of Physics, Arizona State University, Tempe, Arizona. Electronic address: sara.vaiana@asu.edu.
Arizona State University · USUniversity of Washington · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We provide the first direct experimental comparison, to our knowledge, between the internal dynamics of calcitonin-gene-related peptide (CGRP) and amylin (islet amyloid polypeptide, IAPP), two intrinsically disordered proteins of the calcitonin peptide family. Our end-to-end contact formation measurements reveal that in aqueous solution (i.e., in the absence of structure-inducing organic solvents) CGRP preferentially populates conformations with short end-to-end distances. However, the end-to-end distance of CGRP is larger than that of IAPP. We find that electrostatic interactions can account for such a difference. At variance with previous reports on the secondary structure of CGRP, we find that the end-to-end distance of the peptide increases with decreasing pH and salt concentration, due to Coulomb repulsion by charged residues. Interestingly, our data show that the reconfiguration dynamics of CGRP is significantly slower than that of human IAPP in water but not in denaturant, providing experimental evidence for roughness in the energy landscape, or internal friction, in these peptides. The data reported here provide both structural and dynamical information that can be used to validate results from molecular simulations of calcitonin family peptides in aqueous solution.

Indexed as

Amino Acid SequenceCalcitonin Gene-Related PeptideHumansIntrinsically Disordered ProteinsIslet Amyloid PolypeptideModels, MolecularMolecular Sequence DataProtein ConformationStatic ElectricityCalcitonin Gene-Related PeptideIntrinsically Disordered ProteinsIslet Amyloid Polypeptide

Identifiers

PMID26331261
PMCPMC4564681
OpenAlexW1933216452

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.