Cited by 1,429Machine Learning in BioinformaticsProtein Structure and DynamicsProtein Tyrosine Phosphatases

The importance of intrinsic disorder for protein phosphorylation

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Iakoucheva, L. M.·2004·Nucleic Acids Research

Abstract

Reversible protein phosphorylation provides a major regulatory mechanism in eukaryotic cells. Due to the high variability of amino acid residues flanking a relatively limited number of experimentally identified phosphorylation sites, reliable prediction of such sites still remains an important issue. Here we report the development of a new web-based tool for the prediction of protein phosphorylation sites, DISPHOS (DISorder-enhanced PHOSphorylation predictor, http://www.ist.temple. edu/DISPHOS). We observed that amino acid compositions, sequence complexity, hydrophobicity, charge and other sequence attributes of regions adjacent to phosphorylation sites are very similar to those of intrinsically disordered protein regions. Thus, DISPHOS uses position-specific amino acid frequencies and disorder information to improve the discrimination between phosphorylation and non-phosphorylation sites. Based on the estimates of phosphorylation rates in various protein categories, the outputs of DISPHOS are adjusted in order to reduce the total number of misclassified residues. When tested on an equal number of phosphorylated and non-phosphorylated residues, the accuracy of DISPHOS reaches 76% for serine, 81% for threonine and 83% for tyrosine. The significant enrichment in disorder-promoting residues surrounding phosphorylation sites together with the results obtained by applying DISPHOS to various protein functional classes and proteomes, provide strong support for the hypothesis that protein phosphorylation predominantly occurs within intrinsically disordered protein regions.

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  1. Belsley,D.A., Kuh,E. and Welsch,R.E. (1980) Regression Diagnostics. John Wiley and Sons, New York.
  2. Tomek,I. (1976) Two modi®cations of CNN. IEEE Trans. Syst. Man Cybern., 6, 769±772.
  3. Morgan Kaufmann, San Francisco, CA, pp. 179±186.

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Authors
Iakoucheva, L. M.
Affiliations
Washington State University (US)
Corresponding author
Iakoucheva, L. M.
Venue
Nucleic Acids Research
Published
2004-02-13
Volume
32
Issue
3
Pages
1037-1049
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2102025585
Cited by
1,429
References
69
Citations by year
2026: 34 · 2025: 44 · 2024: 53 · 2023: 42 · 2022: 60 · 2021: 71 · 2020: 68 · 2019: 83 · 2018: 77 · 2017: 69 · 2016: 91 · 2015: 90 · 2014: 93 · 2013: 83 · 2012: 88
FWCI
14.56
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Science Foundation (0196237, 9711532)
  • Temple University
  • National Institutes of Health
  • U.S. National Library of Medicine (1R01 LM07688, R01LM007688)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Machine Learning in Bioinformatics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
protein phosphorylation, intrinsically disordered proteins, phosphorylation site prediction, sequence complexity, hydrophobicity, protein regulation
MeSH terms
Amino Acids, Animals, Phosphorylation, Proteins, Reproducibility of Results, Internet, Sequence Analysis, Protein, Proteome, Databases, Protein

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