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Updated: May 16, 2026

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

Gaining insight into membrane protein structure using isotope-edited FTIR.

Joshua Manor¹, Isaiah T Arkin

¹Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmund J. Safra Campus, Jerusalem, 91904, Israel.

Biochimica Et Biophysica Acta

|December 1, 2012

Summary

Fourier-transform infrared (FTIR) spectroscopy, enhanced by stable isotope editing, provides precise structural data for amino acids and membrane protein orientation. This method yields accurate restraints for modeling simple membrane protein structures.

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Area of Science:

Biophysics
Spectroscopy
Structural Biology

Background:

Fourier-transform infrared (FTIR) spectroscopy traditionally provides average structural insights into proteins.
Stable isotope editing advances FTIR, enabling accurate analysis of isolated amino acids.
Anisotropic samples, like membrane layers, allow for orientation measurements of peptidic carbonyl groups.

Purpose of the Study:

To review the theory enabling accurate restraints from FTIR spectroscopy.
To discuss sample suitability and general applicability for FTIR studies.
To propose methods for generating structural models of membrane proteins using FTIR orientational restraints.

Main Methods:

Utilizing Fourier-transform infrared (FTIR) spectroscopy with stable isotope editing.

Keywords:

FTIR Isotope editing Membrane protein Molecular modeling

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Last Updated: May 16, 2026

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

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Published on: June 27, 2014

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Published on: November 25, 2009

Analyzing anisotropic samples, such as membrane layers.

Applying theoretical frameworks for deriving orientational restraints.

Main Results:

FTIR spectroscopy can yield accurate structural information on isolated amino acids.
Orientation of peptidic carbonyl groups can be measured in anisotropic samples.
Development of approaches for structural modeling of membrane proteins.

Conclusions:

FTIR spectroscopy, particularly with stable isotope editing, is a powerful tool for detailed protein structural analysis.
The method provides valuable orientational restraints for structural modeling, especially for membrane proteins.
This review highlights the potential and applicability of FTIR in membrane protein studies.