Evidence map›Paper›PMID 22974364›Full record

ArticleBiomacromolecules2012

Self-assembly of filamentous amelogenin requires calcium and phosphate: from dimers via nanoribbons to fibrils.

Olga Martinez-Avila, Shenping Wu, Seung Joong Kim, Yifan Cheng, Feroz Khan, Ram Samudrala, Andrej Sali, Jeremy A Horst, Stefan Habelitz

Abstract read
In one paragraph

Article in Biomacromolecules, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

35 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Amelogenin proteolysis orchestrates functional amyloid pathways in enamel development.Matrix biology : journal of the International Society for Matrix Biology · 2026
    Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Amyloid-like amelogenin nanoribbons template mineralization via a low-energy interface of ion binding sites.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Uniaxial Hydroxyapatite Growth on a Self-Assembled Protein Scaffold.International journal of molecular sciences · 2021
    Article
  17. Article
  18. Enamel synthesis explained.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  19. Protein nanoribbons template enamel mineralization.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  20. 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

9 authors at 3 institutions in 1 country.

Olga Martinez-AvilaDepartment of Preventative and Restorative Dental Sciences, University of California, 707 Parnassus Avenue, San Francisco, CA 94143, USA.
Shenping Wu
Seung Joong Kim
Yifan Cheng
Feroz Khan
Ram Samudrala
Andrej Sali
Jeremy A Horst
Stefan Habelitz
University of California, San Francisco · USQB3 · USUniversity of Washington · US

Funding

NOVEL PARADIGMS FOR DRUG DISCOVERY: COMPUTATIONAL MULTITARGET SCREENINGDP1LM011509 · NLM · UNIVERSITY OF WASHINGTON · PI SAMUDRALA, RAM · 2012 to 2014
$2.4M
Recombinant Amelogenin Matrices for Apatite NanofibersR01DE017529 · NIDCR · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI HABELITZ, STEFAN FRIEDRICH · 2007 to 2010
$1.7M
NOVEL PARADIGMS FOR DRUG DISCOVERY: COMPUTATIONAL MULTITARGET SCREENINGDP1OD006779 · OD · UNIVERSITY OF WASHINGTON · PI SAMUDRALA, RAM · 2010 to 2011
$1.7M
Individual Predoctoral Dental Scientist FellowshipF30DE017522 · NIDCR · UNIVERSITY OF WASHINGTON · PI HORST, JEREMY ALAN · 2006 to 2010
$173k
NIDCR NIH HHS DE017529S2NIDCR NIH HHS F30 DE017522NIDCR NIH HHS F30-DE017522NIDCR NIH HHS R01 DE017529NIDCR NIH HHS R01-DE017529NIH HHS DP1 OD006779NLM NIH HHS DP1 LM011509
6 · The paper itself

Abstract

Enamel matrix self-assembly has long been suggested as the driving force behind aligned nanofibrous hydroxyapatite formation. We tested if amelogenin, the main enamel matrix protein, can self-assemble into ribbon-like structures in physiologic solutions. Ribbons 17 nm wide were observed to grow several micrometers in length, requiring calcium, phosphate, and pH 4.0-6.0. The pH range suggests that the formation of ion bridges through protonated histidine residues is essential to self-assembly, supported by a statistical analysis of 212 phosphate-binding proteins predicting 12 phosphate-binding histidines. Thermophoretic analysis verified the importance of calcium and phosphate in self-assembly. X-ray scattering characterized amelogenin dimers with dimensions fitting the cross-section of the amelogenin ribbon, leading to the hypothesis that antiparallel dimers are the building blocks of the ribbons. Over 5-7 days, ribbons self-organized into bundles composed of aligned ribbons mimicking the structure of enamel crystallites in enamel rods. These observations confirm reports of filamentous organic components in developing enamel and provide a new model for matrix-templated enamel mineralization.

Indexed as

Protein MultimerizationAmelogeninCalciumDental Enamel ProteinsHydrogen-Ion ConcentrationMicroscopy, Atomic ForceMicroscopy, Electron, TransmissionNanotubes, CarbonPhosphatesAmelogeninCalciumDental Enamel Proteinsenamel matrix proteinsNanotubes, CarbonPhosphates

Identifiers

PMID22974364
PMCPMC3496023
OpenAlexW2085761414

What OpenQuestion 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 OpenQuestion graph.