Evidence map›Paper›PMID 22325285›Full record

ArticleBiophysical journal2012

Depth of α-synuclein in a bilayer determined by fluorescence, neutron reflectometry, and computation.

Candace M Pfefferkorn, Frank Heinrich, Alexander J Sodt, Alexander S Maltsev, Richard W Pastor, Jennifer C Lee

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

58 citing papers in PubMed, 95 citations in OpenAlex.

  1. Article
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  5. Review
  6. Article
  7. α-Synuclein Interaction with Lipid Bilayer Discs.Langmuir : the ACS journal of surfaces and colloids · 2022
    Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Article
  15. Unroofing site-specific α-synuclein-lipid interactions at the plasma membrane.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  16. Article
  17. Computer simulations of protein-membrane systems.Progress in molecular biology and translational science · 2020
    Article
  18. Article
  19. Article
  20. Membrane interactions of intrinsically disordered proteins: The example of alpha-synuclein.Biochimica et biophysica acta. Proteins and proteomics · 2019
    Review
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

6 authors at 2 institutions in 1 country.

Candace M PfefferkornLaboratory of Molecular Biophysics, National Institutes of Health, Bethesda, Maryland, USA.
Frank Heinrich
Alexander J Sodt
Alexander S Maltsev
Richard W Pastor
Jennifer C Lee
National Institutes of Health · USNational Institute of Standards and Technology · US

Funding

Computer Simulations of Membranes and BiopolymersZIAHL000340 · NHLBI · NATIONAL HEART, LUNG, AND BLOOD INSTITUTE · PI PASTOR, RICHARD WALTER · 2009 to 2025
$29.1M
Protein Misfolding and AggregationZIAHL001055 · NHLBI · NATIONAL HEART, LUNG, AND BLOOD INSTITUTE · PI LEE, JENNIFER · 2009 to 2025
$16.9M
Intramural NIH HHS
6 · The paper itself

Abstract

α-Synuclein (α-syn) membrane interactions are implicated in the pathogenesis of Parkinson's disease. Fluorescence and neutron reflectometry (NR) measurements reveal that α-syn penetrates ∼9-14 Å into the outer leaflet of the bilayer, with a substantial portion of the membrane-bound polypeptide extending into the aqueous solvent. For the first time, to our knowledge, we used NR to obtain direct quantitative evidence of α-syn-induced membrane thinning. To examine the effect of specific residues on membrane penetration depths, we used a series of W4-containing N-terminal peptides. We identified that the first 15 residues (P15) nearly recapitulate the features of the full-length protein (i.e., partition constants, molecular mobility, and insertion of the W4 side chain into the bilayer), and found that as few as the first four N-terminal residues are sufficient for vesicle binding. Although at least one imperfect amphipathic repeat sequence (KAKEGV) is required for α-helical formation, secondary structural formation has little effect on membrane affinity. To develop an N-terminal α-syn model for bilayer interactions, we performed molecular-dynamics simulations of the P15 peptide submerged in a bilayer. The simulation results are highly consistent with experimental data indicating a broad low-energy region (8.5-14.5 Å) for W4 insertion.

Indexed as

Models, MolecularNeutron Diffractionalpha-SynucleinAmino Acid SequenceCell MembraneHydrophobic and Hydrophilic InteractionsLipid BilayersMolecular Sequence DataPeptide FragmentsPhospholipidsProtein Structure, SecondarySpectrometry, FluorescenceThermodynamicsalpha-SynucleinLipid BilayersPeptide FragmentsPhospholipids

Identifiers

PMID22325285
PMCPMC3274814
OpenAlexW1976445112

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.