Cited by 4,224Bioinformatics and Genomic NetworksMicrobial Metabolic Engineering and BioproductionGene Regulatory Network Analysis

Hierarchical Organization of Modularity in Metabolic Networks

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Ravasz, E., Somera, A. L., Mongru, D. A., Oltvai, Z. N., Barabási, A.-L.·2002·Science

Abstract

Spatially or chemically isolated functional modules composed of several cellular components and carrying discrete functions are considered fundamental building blocks of cellular organization, but their presence in highly integrated biochemical networks lacks quantitative support. Here, we show that the metabolic networks of 43 distinct organisms are organized into many small, highly connected topologic modules that combine in a hierarchical manner into larger, less cohesive units, with their number and degree of clustering following a power law. Within Escherichia coli , the uncovered hierarchical modularity closely overlaps with known metabolic functions. The identified network architecture may be generic to system-level cellular organization.

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  • Such networks were first constructed based on metabolic pathways, with metabolites as nodes and enzymatic conversions as edges.

    “Such networks were first constructed based on metabolic pathways, with the metabolites corresponding to the nodes and the enzymatic conversions to the edges [65, 66].”

    From Multi-omics approaches to disease (2017) · cites this paper as [66]

  • Previous work using complex networks theory has quantitatively tackled the problem of hierarchy.

    “Although previous work using complex networks theory has quantitatively tackled the problem [3, 4, 22-25, 27-31], some questions remain:”

    From On the origins of hierarchy in complex networks (2013) · cites this paper as [24]

  • Developing a multiscale representation requires analyzing communities in biological networks at more than one scale, defining and identifying communities at each scale, and tracing containment to infer a hierarchical map.

    “Developing a multiscale representation requires analyzing communities in biological networks at more than one scale. Communities (clusters of highly interconnected nodes) are first defined and identified at each of multiple scales; subsequently, communities that are contained within other communities, in whole or in part, can be traced to infer a hierarchical map (Figure 2) (Dotan-Cohen et al., 20”

    From Mapping the multiscale structure of biological systems (2021) · cites this paper as Ravasz et al., 2002

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Research works printed but not linked: 4

  1. [6]6. N. S. Holter, A. Maritan, M. Cieplak, N. V. Fedoroff, J. R. Banavar, Proc Natl Acad Sci Sci U S A 98, 1693 (2001).
  2. [23]23. D. E. Featherstone, K. Broadie, Bioessays 24 (3), 267 (2002).
  3. [26]26. M. Girvan, M. E. J. Newman, Proc. Natl. Acad. Sci. USA 99 , 7821 (2002).
  4. [29]29. R. P. Solé, D. E. Smith, R. Pastor-Satorras, T. Kepler, Santa Fe Preprint (available at http://www.santafe.edu/sfi/publications/wpabstract/200108041).

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Authors
Ravasz, E., Somera, A. L., Mongru, D. A., Oltvai, Z. N., & Barabási, A.-L.
Affiliations
  • University of Notre Dame (US)
  • Northwestern University (US)
  • Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA.
Corresponding author
Oltvai, Z. N.
Venue
Science
Published
2002-08-30
Volume
297
Issue
5586
Pages
1551-1555
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2018045523
Cited by
4,224
References
28
Citations by year
2026: 54 · 2025: 91 · 2024: 109 · 2023: 106 · 2022: 177 · 2021: 194 · 2020: 191 · 2019: 209 · 2018: 214 · 2017: 192 · 2016: 181 · 2015: 200 · 2014: 191 · 2013: 238 · 2012: 209
FWCI
41.03
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene Regulatory Network Analysis
Keywords
metabolic networks, network modularity, hierarchy, topological modules, power-law degree distribution, clustering coefficient, Escherichia coli, cell organization
MeSH terms
Escherichia coli, Metabolism, Models, Biological, Systems Theory

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