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Related Experiment Videos

Extended disordered proteins: targeting function with less scaffold.

Kannan Gunasekaran1, Chung-Jung Tsai, Sandeep Kumar

  • 1Laboratory of Experimental and Computational Biology, NCI- Frederick, MD 21702, USA.

Trends in Biochemical Sciences
|February 11, 2003
PubMed
Summary

Natively disordered proteins offer a solution for large binding interfaces without increasing cell size. This protein characteristic allows for efficient cellular function and energy conservation.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Structural Biology

Background:

  • A significant portion of cellular proteins are natively disordered.
  • Existing theories suggest disordered proteins enhance adaptability, regulation, and ligand binding.

Purpose of the Study:

  • To propose a physically based explanation for the prevalence of natively disordered proteins.
  • To investigate the relationship between protein disorder, intermolecular interfaces, and cellular size constraints.

Main Methods:

  • Analysis of protein structure-function relationships.
  • Modeling the impact of intermolecular interface size on protein and cellular dimensions.
  • Evaluation of energy conservation implications related to cellular and molecular size.

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Main Results:

  • Disordered proteins frequently possess large intermolecular interfaces.
  • Achieving stability with large interfaces would necessitate 2-3 times larger monomeric proteins.
  • This increase in protein size would lead to a 15-30% larger cell size or increased cellular crowding.

Conclusions:

  • Natively disordered proteins provide a mechanism for large intermolecular interfaces while maintaining smaller protein and cell sizes.
  • This offers an energy-efficient solution for cellular organization and function.
  • The physical constraints of cellular space and energy conservation likely favor the prevalence of disordered proteins.