Related Experiment Video
Updated: Aug 6, 2026
10:58
Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
Published on: July 25, 2013
Computational characterization of the sequence landscape in simple protein alphabets
M Scott Shell1, Pablo G Debenedetti, Athanassios Z Panagiotopoulos
1Department of Chemical Engineering, Princeton University, Princeton, NJ 08544, USA. shell@princeton.edu
Proteins
|November 15, 2005
Summary
We explored protein sequence landscapes and their mutation properties using Monte Carlo simulations. Different energy functions significantly impact landscape smoothness and protein design strategies.
Area of Science:
- Computational biology
- Biophysics
- Protein structure and dynamics
Background:
- Understanding protein sequence-energy relationships is crucial for predicting protein structure and function.
- Sequence landscapes describe the distribution of energies for all possible amino acid sequences of a given length.
- Characterizing these landscapes helps in deciphering the principles of protein folding and stability.
Purpose of the Study:
- To characterize sequence landscapes in heteropolymer protein models by examining mutation properties.
- To compare the 'smoothness' of these landscapes using different energy functions.
- To assess the impact of model-specific features on protein design algorithms.
Main Methods:
- Employed an efficient flat-histogram Monte Carlo search method.
- Determined the energy distribution of all sequences of a given length threaded through a common backbone.
- Utilized two variants of the Miyazawa-Jernigan contact potential and the 2-monomer HP model.
Main Results:
- Significant differences were observed in landscape 'smoothness' across various energy functions.
- One Miyazawa-Jernigan potential exhibited cooperative interactions, leading to phase transitions in sequence space.
- The study highlights how model-specific features profoundly influence protein design outcomes.
Conclusions:
- Sequence landscape characterization provides insights into protein folding and stability.
- The choice of energy function critically affects the predicted sequence landscape and its properties.
- The findings offer valuable methods for quantifying sequence landscapes and improving protein design algorithms.
More Related Videos
Related Concept Videos
01:13Protein Organization
Overview
02:26Conservation of Protein Domains Over Different Proteins
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
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...
01:41Signal Sequences and Sorting Receptors
Signal sequences are short amino acid sequences that guide newly synthesized proteins to their proper location within the cell. Classical signal sequences are fifteen to sixty amino acids long and present at the N-terminus of a polypeptide chain. Each signal sequence has a conserved segment of basic residues towards their N terminus, a hydrophobic core, and a C-terminus rich in polar residues. The C-terminus also contains a signal cleavage site and features a -3 -1 sequence motif. The -3-1...
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.
02:26Conservation of Protein Domains
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...