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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.

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Related Experiment Video

Updated: Jun 21, 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

SDSL-ESR-based protein structure characterization.

Janez Strancar1, Aleh Kavalenka, Iztok Urbancic

  • 1Laboratory of Biophysics, Solid State Physics Department, Jozef Stefan Institute, 1000 Ljubljana, Slovenia. Janez.Strancar@ijs.si

European Biophysics Journal : EBJ
|August 12, 2009
PubMed
Summary
This summary is machine-generated.

Determining protein structures, especially flexible ones, is challenging. This study introduces a new method combining site-directed spin labelling electron spin resonance spectroscopy (SDSL-ESR) and protein structure modeling to overcome these limitations.

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Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae
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Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae

Published on: January 10, 2018

Related Experiment Videos

Last Updated: Jun 21, 2026

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

Published on: October 2, 2017

Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae
09:15

Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae

Published on: January 10, 2018

Area of Science:

  • Biophysics
  • Structural Biology
  • Computational Biology

Background:

  • Proteins are crucial for cellular functions, with structure determination vital for scientific, biotechnological, and medical advancements.
  • Existing high-resolution structure-determination methods struggle with less-ordered, hydrophobic, and flexible protein systems, as evidenced by the Protein Data Bank.
  • There is a pressing need for novel biophysical techniques to efficiently determine challenging protein structures.

Purpose of the Study:

  • To address the limitations of current protein structure determination methods.
  • To develop and generalize a novel biophysical approach for determining protein structures, particularly for challenging systems.
  • To establish a general procedure for protein structure determination using a combined technique.

Main Methods:

  • A novel combination of site-directed spin labelling electron spin resonance spectroscopy (SDSL-ESR) and protein structure modelling was employed.
  • The method incorporates restriction of conformational spaces for amino acid side chains.
  • The approach was applied and compared across four distinct protein systems.

Main Results:

  • The study successfully applied the novel SDSL-ESR and protein structure modelling approach to four different protein systems.
  • The results demonstrate the method's capability in determining structures of less-ordered, hydrophobic, and flexible proteins.
  • The findings pave the way for a generalized procedure in protein structure determination.

Conclusions:

  • The developed method offers a powerful new tool for tackling challenging protein structure determination.
  • This technique enhances our ability to study protein structures, advancing fields like biotechnology and medicine.
  • The generalized procedure facilitates broader application in structural biology research.