Fast prediction of protein domain boundaries using conserved local patterns
Rajani R Joshi1, Vivekanand V Samant
1Department of Mathematics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India. rrj@math.iitb.ac.in
Journal of Molecular Modeling
|May 2, 2006
Summary
This study introduces a novel method for predicting protein domain boundaries by identifying conserved motifs and structural patterns. The new approach significantly enhances prediction accuracy compared to existing algorithms, improving protein structure analysis.
Area of Science:
- Computational Biology
- Structural Bioinformatics
- Protein Domain Analysis
Background:
- Protein domain boundary prediction is crucial for understanding protein function and evolution.
- Existing methods like Domain Guess by Size (DGS) have limitations in accuracy, especially for discontinuous domains.
Purpose of the Study:
- To develop a data-driven method for identifying conserved motifs and secondary structural patterns near protein domain boundaries.
- To improve the accuracy of protein domain boundary prediction by reranking DGS algorithm solutions using these identified patterns.
Main Methods:
- A data-driven approach was used to discover conserved motifs and secondary structural patterns without prior constraints or sequence homology requirements.
- These discovered patterns were applied to rerank solutions from the Domain Guess by Size (DGS) algorithm, creating a new method: Domain Boundary Prediction using Conserved Patterns (DPCP).
Main Results:
- DPCP significantly improved the average accuracy of top-five predictions for both continuous (71.74% to 82.88%) and discontinuous (21.38% to 80.56%) domain proteins.
- For single top predictions, DPCP achieved up to 72.74% accuracy for continuous domains and 76.3% for discontinuous domains.
- DPCP outperformed Domain Identification from Secondary Structure Element Alignment (DomSSEA), the previous best method.
Conclusions:
- The DPCP method effectively leverages conserved motifs and structural patterns to enhance protein domain boundary prediction accuracy.
- This approach offers a significant advancement over existing methods, particularly for discontinuous protein domains.
- The findings provide a more reliable tool for structural bioinformatics and protein function analysis.
Related Concept Videos
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...
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...
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...
01:49Conserved 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...
00:59Mechanisms of Membrane Domain Formation
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
01:18Membrane Domains
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...