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Related Concept Videos

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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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...

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Updated: Jul 15, 2026

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

General method for site-specific protein immobilization by Staudinger ligation.

Jeet Kalia1, Nicholas L Abbott, Ronald T Raines

  • 1Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1544, USA.

Bioconjugate Chemistry
|May 10, 2007
PubMed
Summary

This study presents a new method for orienting proteins on surfaces using Staudinger ligation, enabling precise protein microarray fabrication. This technique ensures proteins maintain their activity and binding capabilities for studying protein-ligand interactions.

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Synthesis of an Intein-mediated Artificial Protein Hydrogel
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Synthesis of an Intein-mediated Artificial Protein Hydrogel

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Last Updated: Jul 15, 2026

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

Synthesis of an Intein-mediated Artificial Protein Hydrogel
15:06

Synthesis of an Intein-mediated Artificial Protein Hydrogel

Published on: January 27, 2014

Area of Science:

  • Biochemistry
  • Surface Chemistry
  • Materials Science

Background:

  • Protein microarrays are crucial for studying protein-ligand interactions.
  • Uniform protein orientation on surfaces enhances microarray performance.
  • Site-specific immobilization is key for predictable protein display.

Purpose of the Study:

  • To develop a general strategy for fabricating gold surfaces with uniformly oriented proteins.
  • To demonstrate the utility of this strategy for creating functional protein microarrays.

Main Methods:

  • Installation of an azido group at the C-terminus of a model protein (bovine pancreatic ribonuclease) using expressed protein ligation.
  • Immobilization of the azido-modified protein onto a gold surface via Staudinger ligation with a phosphinothioester-functionalized self-assembled monolayer.
  • Characterization of the immobilized protein's activity and binding capabilities.

Main Results:

  • Rapid and selective immobilization of the azido protein via Staudinger ligation.
  • The immobilized bovine pancreatic ribonuclease retained its enzymatic activity.
  • The uniformly oriented enzyme successfully bound to its natural ligand, ribonuclease inhibitor protein.

Conclusions:

  • The developed strategy provides a general method for site-specific protein immobilization.
  • This approach enables the fabrication of protein microarrays with uniform protein orientation.
  • Uniformly oriented proteins on surfaces are essential for reliable protein-ligand interaction studies.