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Related Concept Videos

Allosteric Proteins-ATCase01:19

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Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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Identification of Functional Protein Regions Through Chimeric Protein Construction
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Enzyme-DNA chimeras: Construction, allostery, applications.

Chiao-Yu Tseng1, Yong Wang2, Giovanni Zocchi3

  • 1Institute of Physics, Academia Sinica, Taipei, Taiwan.

Methods in Enzymology
|January 23, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed enzyme-DNA chimeras, coupling DNA springs to enzymes for artificial allosteric control. This versatile method allows gradual modulation of enzymatic activity for various applications.

Keywords:
Allosteric controlBioluminescence probeDNA springDNA-based toolEnzyme kineticsMechanical control of enzymesMechanophoresProtein-DNA chimerasSupramolecular constructions

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Nanotechnology

Background:

  • Enzyme activity is typically regulated by natural allosteric mechanisms.
  • Controlling enzyme function artificially offers new possibilities in molecular engineering and diagnostics.

Purpose of the Study:

  • To introduce a novel method for artificial allosteric control of enzymes using DNA.
  • To demonstrate the versatility and tunability of this enzyme-DNA chimera system.
  • To provide detailed protocols for the synthesis and application of these constructs.

Main Methods:

  • Construction of enzyme-DNA chimeras by coupling DNA springs to enzymes.
  • Fine-tuning the mechanical stress applied by the DNA spring to modulate enzyme activity.
  • Synthesis of these supramolecular constructs using detailed protocols.

Main Results:

  • Demonstrated successful integration of DNA springs with various enzymes and proteins.
  • Showcased the ability to gradually modulate enzymatic activity through semi-continuous tuning of DNA spring stress.
  • Validated the universal applicability of the enzyme-DNA chimera approach.

Conclusions:

  • Enzyme-DNA chimeras represent a universal and versatile platform for artificial enzyme control.
  • This technology has potential for fundamental studies of enzyme conformational plasticity.
  • The constructs can be utilized as advanced molecular probes for various biological investigations.