Evidence map›Paper›PMID 18597439›Full record

ArticleJournal of the American Chemical Society2008

Asymmetric insertion of membrane proteins in lipid bilayers by solid-state NMR paramagnetic relaxation enhancement: a cell-penetrating Peptide example.

Yongchao Su, Rajeswari Mani, Mei Hong

Abstract read
In one paragraph

Article in Journal of the American Chemical Society, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
–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

31 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Solid-state NMR spectroscopy.Nature reviews. Methods primers · 2021
    Article
  10. Gadolinium Complexes as Contrast Agent for Cellular NMR Spectroscopy.International journal of molecular sciences · 2020
    Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Membrane protein structure and dynamics from NMR spectroscopy.Annual review of physical chemistry · 2012
    Review
  18. Article
  19. Article
  20. 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

3 authors.

Yongchao SuDepartment of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
Rajeswari Mani
Mei Hong

Funding

Structures and lipid interactions of curvature-inducing membrane peptides by NMRR01GM066976 · NIGMS · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI HONG, MEI · 2003 to 2021
$4.8M
NIGMS NIH HHS GM-066976NIGMS NIH HHS R01 GM066976
6 · The paper itself

Abstract

A novel solid-state NMR technique for identifying the asymmetric insertion depths of membrane proteins in lipid bilayers is introduced. By applying Mn (2+) ions on the outer but not the inner leaflet of lipid bilayers, the sidedness of protein residues in the lipid bilayer can be determined through paramagnetic relaxation enhancement (PRE) effects. Protein-free lipid membranes with one-side Mn (2+)-bound surfaces exhibit significant residual (31)P and lipid headgroup (13)C intensities, in contrast to two-side Mn (2+)-bound membranes, where lipid headgroup signals are mostly suppressed. Applying this method to a cell-penetrating peptide, penetratin, we found that at low peptide concentrations, penetratin is distributed in both leaflets of the bilayer, in contrast to the prediction of the electroporation model, which predicts that penetratin binds to only the outer lipid leaflet at low peptide concentrations to cause an electric field that drives subsequent peptide translocation. The invalidation of the electroporation model suggests an alternative mechanism for intracellular import of penetratin, which may involve guanidinium-phosphate complexation between the peptide and the lipids.

Indexed as

Carbon IsotopesCarrier ProteinsCell-Penetrating PeptidesDrug Delivery SystemsElectroporationLipid BilayersManganeseMembrane ProteinsNuclear Magnetic Resonance, BiomolecularPhosphorus IsotopesCarbon IsotopesCarrier ProteinsCell-Penetrating PeptidesLipid BilayersManganeseMembrane ProteinspenetratinPhosphorus Isotopes

Identifiers

PMID18597439
PMCPMC4083468

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Registered trials

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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.