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Network Connectivity, Centrality and Fragmentation in the Greek-Key Protein Topology.

Zeinab Haratipour1, Hind Aldabagh2, Yaohang Li2

  • 1Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA, 23529, USA.

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Network science reveals key amino acids crucial for protein folding and topology. Specific residues in similar positions maintain the Greek-key protein structure, aiding computational prediction.

Keywords:
Betweeness centralityDiameterFragmentationGreek-key topologyProtein networks

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Area of Science:

  • Computational Biology
  • Biophysics
  • Network Science

Background:

  • Protein folding is a complex challenge requiring interdisciplinary collaboration.
  • Long-range interactions are vital for protein native structure formation.
  • Predicting the formation of native long-range interaction networks for specific topologies remains unresolved.

Purpose of the Study:

  • To identify amino acids and long-range interactions critical for building and maintaining protein topology.
  • To explore the role of network science in analyzing protein structures.
  • To investigate if residues with high betweenness centrality govern protein topology.

Main Methods:

  • Network science applied to analyze protein structures with Greek-key topology.
  • Computational methods including fragmentation tests and diameter impact analysis.
  • Identification of residues with high betweenness centrality scores.

Main Results:

  • A subset of selected residues in similar geographical positions was identified across different proteins.
  • These specific residues and regions play a significant role in governing the Greek-key topology.
  • Network analysis provides insights into the structural maintenance of protein topology.

Conclusions:

  • The study highlights the importance of specific residues and their network properties in protein topology.
  • Network science offers a valuable perspective for understanding protein folding and structure.
  • Findings contribute to the computational prediction of protein folding and native structures.