Evidence map›Paper›PMID 19456151›Full record

ArticleJournal of the American Chemical Society2009

Three-dimensional structure and orientation of rat islet amyloid polypeptide protein in a membrane environment by solution NMR spectroscopy.

Ravi Prakash Reddy Nanga, Jeffrey R Brender, Jiadi Xu, Kevin Hartman, Vivekanandan Subramanian, Ayyalusamy Ramamoorthy

Abstract read
In one paragraph

Article in Journal of the American Chemical Society, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed
8.4field-weighted citation impact, top 2% 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

68 citing papers in PubMed, 146 citations in OpenAlex.

  1. QBP1 Peptide as a Potential Anti-Amyloidogenic Therapy for Type 2 Diabetes: An In Vitro Study.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
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  18. Semen-derived amyloidogenic peptides-Key players of HIV infection.Protein science : a publication of the Protein Society · 2018
    Review
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  20. Review

8 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

6 authors at 2 institutions in 1 country.

Ravi Prakash Reddy NangaDepartment of Chemistry and Biophysics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Jeffrey R Brender
Jiadi Xu
Kevin Hartman
Vivekanandan Subramanian
Ayyalusamy Ramamoorthy
United States Food and Drug Administration · USUniversity of Michigan–Ann Arbor · US

Funding

Structure and function of antimicrobial peptidesR01AI054515 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI RAMAMOORTHY, AYYALUSAMY · 2004 to 2008
$1.3M
Membrane Interaction and Membrane Mediated Aggregation of AmylinR21DK078885 · NIDDK · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI RAMAMOORTHY, AYYALUSAMY · 2009 to 2010
$411k
NIAID NIH HHS R01 AI054515NIDDK NIH HHS DK078885NIDDK NIH HHS R21 DK078885
6 · The paper itself

Abstract

Islet amyloid polypeptide (IAPP or amylin) is a 37-residue peptide hormone associated with glucose metabolism that is cosecreted with insulin by beta-cells in the pancreas. Since human IAPP is a highly amyloidogenic peptide, it has been suggested that the formation of IAPP amyloid fibers is responsible for the death of beta-cells during the early stages of type II diabetes. It has been hypothesized that transient membrane-bound alpha-helical structures of human IAPP are precursors to the formation of these amyloid deposits. On the other hand, rat IAPP forms transient alpha-helical structures but does not progress further to form amyloid fibrils. To understand the nature of this intermediate state and the difference in toxicity between the rat and human versions of IAPP, we have solved the high-resolution structure of rat IAPP in the membrane-mimicking detergent micelles composed of dodecylphosphocholine. The structure is characterized by a helical region spanning the residues A5 to S23 and a disordered C-terminus. A distortion in the helix is seen at R18 and S19 that may be involved in receptor binding. Paramagnetic quenching NMR experiments indicate that rat IAPP is bound on the surface of the micelle, in agreement with other nontoxic forms of IAPP. A comparison to the detergent-bound structures of other IAPP variants indicates that the N-terminal region may play a crucial role in the self-association and toxicity of IAPP by controlling access to the putative dimerization interface on the hydrophobic face of the amphipathic helix.

Indexed as

Amino Acid SequenceAmyloidAnimalsIslet Amyloid PolypeptideMembranesMicellesMolecular Sequence DataNuclear Magnetic Resonance, BiomolecularPhosphorylcholineProtein Structure, SecondaryRatsSolutionsAmyloiddodecylphosphocholineIslet Amyloid PolypeptideMicellesPhosphorylcholineSolutions

Identifiers

PMID19456151
PMCPMC4163022
OpenAlexW2147226356

What Socratic 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 Socratic graph.