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Engineering crowding sensitivity into protein linkers.

Theodoros Pittas1, Weiyan Zuo1, Arnold J Boersma1

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Summary
This summary is machine-generated.

Cellular crowding affects protein linkers, altering their conformation and potentially protein activity. Understanding these effects is key to engineering protein interactions within crowded biological environments.

Keywords:
Förster resonance energy transferIntrinsic disordered proteinMacromolecular crowdingProtein linkersProtein probes

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Area of Science:

  • Biochemistry
  • Biophysics
  • Cell Biology

Background:

  • The intracellular environment is crowded with biomacromolecules, influencing molecular interactions.
  • These crowding effects impact protein conformation and self-assembly through steric barriers and weak interactions.
  • Disordered protein linkers are particularly susceptible to conformational changes under crowded conditions.

Purpose of the Study:

  • To review experimental findings on how crowding affects linkers and macromolecules in vitro and in cells.
  • To explore the influence of linker size, flexibility, and interactions on crowding effects.
  • To propose a protocol for engineering crowding effects on linkers and determine crowding sensitivity.

Main Methods:

  • Review of in vitro and cellular experimental data on macromolecular crowding.
  • Analysis of linker properties (size, flexibility, interactions) in relation to crowding.
  • Development of a protocol for engineering and measuring linker sensitivity to crowding.

Main Results:

  • Crowding significantly alters linker conformations compared to dilute conditions.
  • Linker size, flexibility, and intra/intermolecular interactions modulate crowding effects.
  • Extrapolation of data suggests methods to direct crowding impacts on linkers.

Conclusions:

  • Cellular crowding is a critical factor influencing protein linker behavior and function.
  • Tailoring linker properties can allow for engineering specific responses to crowding.
  • Protocols are presented for assessing and manipulating linker sensitivity to crowding.