Related Experiment Video
Updated: Jul 13, 2026
14:55
Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Inference of macromolecular assemblies from crystalline state
Evgeny Krissinel1, Kim Henrick
1European Bioinformatics Institute, Genome Campus, Hinxton, Cambridge CB10 1SD, UK.
Journal of Molecular Biology
|August 8, 2007
Summary
This study introduces a new thermodynamic method to identify macromolecular complexes in X-ray crystallography data. The approach successfully detects biological units, highlighting X-ray crystallography
Area of Science:
- Biophysics
- Structural Biology
- Computational Biology
Background:
- Macromolecular complexes are crucial biological units.
- Understanding their formation and properties is key to biological function.
- Accurate identification of these complexes is essential for structural biology.
Purpose of the Study:
- To explore physical-chemical principles of stable macromolecular complex formation.
- To investigate theoretical approaches for calculating macromolecular affinity and entropy.
- To develop an automated method for detecting macromolecular assemblies in PDB data.
Main Methods:
- Application of chemical thermodynamics principles.
- Development of an algorithm for automatic detection of macromolecular assemblies.
- Utilizing data from X-ray diffraction experiments in the Protein Data Bank (PDB).
Main Results:
- Macromolecular entropy significantly influences complex size and symmetry.
- The new method achieves an 80-90% success rate in recovering biological units.
- X-ray crystallography is confirmed as a vital source for studying macromolecular complexes.
Conclusions:
- The developed method reliably identifies macromolecular assemblies from X-ray data.
- This work enhances the study of protein-protein interactions and complex biological functions.
- The method is available as a public web service for broader accessibility.
Related Concept Videos
01:18Assembly of Cytoskeletal Filaments
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
02:41Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
01:29Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...