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Related Concept Videos

Amino acids03:42

Amino acids

Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible for...
Ligand Binding Sites02:40

Ligand 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-protein Interfaces02:04

Protein-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...
Protein-Protein Interfaces02:04

Protein-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...
Protein Folding01:25

Protein 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 Folding01:22

Protein Folding

Overview

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Related Experiment Video

Updated: Jun 17, 2026

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

Amino acid interaction preferences in proteins.

Anupam Nath Jha1, Saraswathi Vishveshwara, Jayanth R Banavar

  • 1Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India.

Protein Science : a Publication of the Protein Society
|January 15, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a knowledge-based method to predict amino acid interactions during protein folding. The findings reveal optimal parameters for understanding protein structure and sequence compatibility.

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Area of Science:

  • Computational biology
  • Biophysics
  • Structural biology

Background:

  • Predicting protein folding and interactions is crucial for understanding biological function.
  • Current models face challenges in accurately capturing the complex interplay of factors influencing amino acid preferences.

Purpose of the Study:

  • To develop a knowledge-based approach for determining effective amino acid interactions.
  • To identify key factors influencing these interactions, including amino acid type, secondary structure, and local environment.

Main Methods:

  • Utilized a knowledge-based approach analyzing native state structures.
  • Developed a 60x60 matrix representing amino acid interactions across helix, beta strand, and loop structures.
  • Applied clustering to identify similarities and a nonredundant set of interactions.

Main Results:

  • Identified optimal information encoded in a matrix detailing amino acid interactions within specific secondary structures.
  • Clustering revealed similarities and a reduced set of essential interactions.
  • Demonstrated the utility of inferred energy parameters for sequence-structure assessment.

Conclusions:

  • The developed method effectively captures amino acid interaction preferences in protein folding.
  • The inferred energy parameters provide a valuable tool for predicting sequence compatibility with native structures.
  • This approach enhances our understanding of the fundamental principles governing protein structure determination.