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Related Concept Videos

Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence its...
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

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Updated: May 31, 2026

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092
08:53

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092

Published on: October 2, 2017

Surveying protein structure and function using bis-arsenical small molecules.

Rebecca A Scheck1, Alanna Schepartz

  • 1Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, USA.

Accounts of Chemical Research
|July 20, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed bipartite tetracysteine display, a novel method using small molecules to track protein behavior in cells. This technique enables monitoring protein structure and function, advancing biological and medical research.

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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

Published on: November 5, 2018

Area of Science:

  • Biochemistry
  • Chemical Biology
  • Molecular Biology

Background:

  • Understanding biomolecular interactions is crucial in biology and medicine.
  • Monitoring protein localization, structure, and function in living cells is essential for this understanding.
  • Existing tools have limitations in tracking complex cellular processes.

Purpose of the Study:

  • To develop novel tools for monitoring protein localization, structure, and function.
  • To introduce and elaborate on the bipartite tetracysteine display strategy.
  • To showcase the versatility and applications of this new technique.

Main Methods:

  • Bipartite tetracysteine display utilizing specific binding between fluorogenic small molecules (e.g., FlAsH, ReAsH) and tetracysteine tags.
  • Engineering protein sequences to present tetracysteine tags in a conformationally relevant manner.
  • Developing novel sensors and microscopy techniques based on this display strategy.

Main Results:

  • Demonstrated successful application of bipartite tetracysteine display for monitoring protein behavior.
  • Developed a Src kinase sensor with superior fluorescent readout compared to FRET-based sensors.
  • Enabled visualization of protein-protein complexes using complex-edited electron microscopy (CE-EM).

Conclusions:

  • Bipartite tetracysteine display is a versatile tool for studying complex biological questions.
  • Further development requires understanding photophysics and identifying new orthogonal dye-tag pairs.
  • This technology holds significant promise for advancing biochemistry, biology, and understanding human disease.