Related Experiment Video
Updated: Jul 14, 2026
05:08
Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins
Published on: July 8, 2025
Correlations between designability and various structural characteristics of protein lattice models
Jian-Yi Yang1, Zu-Guo Yu, Vo Anh
1School of Mathematics and Computing Science, Xiangtan University, Hunan 411105, China.
The Journal of Chemical Physics
|May 26, 2007
Summary
Protein structure designability is consistently high across various lattice types, alphabet sizes, and energy functions. Local interactions enhance designability, with biased sampling methods outperforming random sampling.
Area of Science:
- Computational Biology
- Biophysics
- Protein Folding
Background:
- Protein structure prediction and design are fundamental challenges in biology.
- Understanding the factors that govern protein designability is crucial for protein engineering.
Purpose of the Study:
- To investigate the designability of protein structures under diverse lattice types, alphabet sizes, and energy functions.
- To elucidate the relationship between designability, stability, foldability, and partnum.
Main Methods:
- Calculated protein structure designability using six lattice types, three alphabet sizes, and two energy functions.
- Employed random sampling and common biased sampling (CBS) of protein sequence space.
- Quantified stability (average energy gap), foldability, and partnum to assess designability.
Main Results:
- A highly designable (preferred) structure emerged consistently across all tested conditions.
- Local interactions were found to reduce degeneracy and increase designability.
- CBS and Metropolis Monte Carlo sampling methods yielded higher designability than random sampling.
- Strong positive correlations were observed between designability, stability, and foldability.
Conclusions:
- Protein structure designability is robust to variations in lattice, alphabet, and energy function, with local interactions playing a key role.
- Biased sampling methods are more effective than random sampling for enhancing designability.
- Stability and foldability are strong predictors of designability, offering insights for protein tertiary structure prediction.
Related Concept Videos
01:24Protein 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.
The primary structure of a protein is its amino acid sequence.
02:40Ligand 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...
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...
01:49Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
01:22Protein Folding
Overview
01:25Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...