Evidence map›Paper›PMID 19236004›Full record

ArticleBiochemistry2009

The tooth enamel protein, porcine amelogenin, is an intrinsically disordered protein with an extended molecular configuration in the monomeric form.

Katya Delak, Craig Harcup, Rajamani Lakshminarayanan, Zhi Sun, Yuwwei Fan, Janet Moradian-Oldak, John Spencer Evans

Open access · greenAbstract read
In one paragraph

Article in Biochemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed
10.3field-weighted citation impact, top 1% 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

83 citing papers in PubMed, 150 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Review
  9. Ameloblastin and its multifunctionality in amelogenesis: A review.Matrix biology : journal of the International Society for Matrix Biology · 2024
    Review
  10. Article
  11. Article
  12. High-yield recombinant bacterial expression ofProtein science : a publication of the Protein Society · 2023
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Review
  20. Review

23 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

7 authors at 2 institutions in 1 country.

Katya DelakLaboratory for Chemical Physics, New York University, 345 East 24th Street, Room 1007, New York, New York 10010, USA.
Craig Harcup
Rajamani Lakshminarayanan
Zhi Sun
Yuwwei Fan
Janet Moradian-Oldak
John Spencer Evans
University of Southern California · USNew York University · US

Funding

YEAST THREONINE &SERINE KINASESP41RR001614 · NCRR · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ORTIZ DE MONTELLANO, PAUL R · 1985 to 2011
$24.1M
MATRIX-BASED MINERAL (MBM) ENAMEL BIOMIMETICSR01DE013414 · NIDCR · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Janet Oldak · 2001 to 2026
$8.6M
900 MHz NMR Spectrometer for Structural BiologyP41GM066354 · NIGMS · NEW YORK STRUCTURAL BIOLOGY CENTER · PI COWBURN, DAVID · 2002 to 2006
$4.7M
INTRINSICALLY DISORDERED PROTEINS IN BIOMINERALIZATIONR01DE020099 · NIDCR · UNIVERSITY OF SOUTHERN CALIFORNIA · PI OLDAK, JANET · 2009 to 2013
$2.0M
ACTION AND FUNCTION OF MMP-20 DURING ENAMEL FORMATIONR01DE015644 · NIDCR · UNIVERSITY OF SOUTHERN CALIFORNIA · PI OLDAK, JANET · 2005 to 2008
$1.2M
MATRIX BASED MINERAL ENAMEL-BIOMIMETICSR56DE013414 · NIDCR · UNIVERSITY OF SOUTHERN CALIFORNIA · PI OLDAK, JANET · 2018 to 2018
$387k
NCRR NIH HHS P41 RR001614NIDCR NIH HHS DE-013414NIDCR NIH HHS R01 DE013414NIDCR NIH HHS R01 DE015644NIDCR NIH HHS R01 DE020099NIDCR NIH HHS R56 DE013414NIGMS NIH HHS P41 GM066354NIGMS NIH HHS P41 GM66354
6 · The paper itself

Abstract

Amelogenins make up a class of proteins associated with the formation of mineralized enamel in vertebrates, possess highly conserved N- and C-terminal sequence regions, and represent an interesting model protein system for understanding biomineralization and protein assembly. Using bioinformatics, we report here the identification of molecular traits that classify 12 amelogenin proteins as members of the intrinsically disordered or unstructured protein family (IDPs), a group of proteins that normally exist as unfolded species but are capable of transformation to a folded state as part of their overall function. Using biophysical techniques (CD and NMR), we follow up on our bioinformatics studies and confirm that one of the amelogenins, recombinant porcine rP172, exists in an extended, unfolded state in the monomeric form. This protein exhibits evidence of conformational exchange between two states, and this exchange may be mediated by Pro residues in the sequence. Although the protein is globally unfolded, we detect the presence of local residual secondary structure [alpha-helix, extended beta-strand, turn/loop, and polyproline type II (PPII)] that may serve several functional roles within the enamel matrix. The extended, labile conformation of rP172 amelogenin is compatible with the known functions of amelogenin in enamel biomineralization, i.e., self-assembly, associations with other enamel matrix proteins and with calcium phosphate biominerals, and interaction with cell receptors. It is likely that the labile structure of this protein facilitates interactions of amelogenin with other macromolecules or with minerals for achievement of internal protein stabilization.

Indexed as

AmelogeninAnimalsCircular DichroismHydrogen-Ion ConcentrationHydrophobic and Hydrophilic InteractionsLightModels, MolecularNuclear Magnetic Resonance, BiomolecularPhase TransitionProtein ConformationProtein StabilityProtein Structure, SecondaryRecombinant ProteinsScattering, RadiationSequence Analysis, ProteinSolubilityAmelogeninRecombinant ProteinsWater

Identifiers

PMID19236004
PMCPMC2748245
OpenAlexW2134370487

What OpenQuestion holds

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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.