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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
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The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
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Related Experiment Video

Updated: Jun 24, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
09:51

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Protein dynamism and evolvability.

Nobuhiko Tokuriki1, Dan S Tawfik

  • 1Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.

Science (New York, N.Y.)
|April 11, 2009
PubMed
Summary
This summary is machine-generated.

Proteins are dynamic and adaptable, not fixed. This flexibility and functional promiscuity are key to protein evolution, enabling new functions and structures.

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Last Updated: Jun 24, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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Published on: July 16, 2017

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Traditional view: proteins have fixed structures and specific functions.
  • Observation: proteins demonstrate remarkable adaptability and evolution of new functions/structures.
  • Conflict: fixed structure/function model versus observed protein plasticity.

Purpose of the Study:

  • Propose an alternative "avant-garde view" of protein structure and function.
  • Explore the role of protein dynamism and functional promiscuity in protein evolvability.
  • Investigate the impact of protein packing on evolvability.

Main Methods:

  • Conceptual framework development based on existing literature.
  • Analysis of protein conformational dynamics and functional promiscuity.
  • Extrapolation of dynamic principles to early protein evolution and future research.

Main Results:

  • Proteins are conformationally dynamic and functionally promiscuous.
  • These properties are foundational to protein evolvability.
  • Poorly packed and disordered proteins exhibit higher evolvability.
  • Dynamic view facilitates understanding of new function/fold evolution.

Conclusions:

  • Protein dynamism and functional promiscuity are central to protein evolution.
  • Understanding protein dynamics is crucial for predicting evolutionary trajectories.
  • Future research should focus on protein dynamism and its evolutionary implications.