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Conservation of Protein Domains Over Different Proteins

Conservation 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...

Protein Folding

Protein Folding

Protein Folding

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 Folding

Protein Folding

Protein Organization

Protein 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.

Protein Organization

Protein Organization

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Related Experiment Video

Updated: May 8, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Protein conformational populations and functionally relevant substates.

Arvind Ramanathan¹, Andrej Savol, Virginia Burger

¹Computational Science and Engineering Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.

Accounts of Chemical Research

|August 31, 2013

Summary

This summary is machine-generated.

Proteins function through a dynamic range of conformations, not a single structure. Understanding these protein conformational substates is key to enzyme function, engineering, and drug design.

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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

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Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Optimization of Synthetic Proteins: Identification of Interpositional Dependencies Indicating Structurally and/or Functionally Linked Residues

Published on: July 14, 2015

Area of Science:

Biochemistry and Molecular Biology
Structural Biology
Computational Biology

Background:

Proteins exist as dynamic ensembles of conformations, not static structures.
Protein motions, on fast and slow timescales, allow sampling of diverse conformational substates.
These substates possess unique dynamic and structural features crucial for protein function.

Purpose of the Study:

To review recent advancements and challenges in characterizing functionally relevant protein conformational substates.
To highlight the role of conformational substates in enzyme catalysis and reaction mechanisms.
To discuss the implications of understanding protein dynamics for enzyme engineering and drug design.

Main Methods:

Nuclear Magnetic Resonance (NMR) spectroscopy to study conformational ensembles.
X-ray crystallography to identify populated protein states.
Computational simulations to provide atom-level insights into conformational substates.

Main Results:

Characterizing conformational substates and their populations enhances understanding of protein structure-dynamics-function relationships.
Enzymes like dihydrofolate reductase utilize conformational substates for substrate binding, release, and catalysis.
Long-timescale fluctuations enable enzymes like cyclophilin A to access transition states, promoting reaction mechanisms.

Conclusions:

The concept of functionally relevant conformational substates offers a new paradigm for understanding protein behavior.
This understanding is crucial for advancing enzyme engineering and developing novel therapeutic strategies.
Modulating protein conformations, through methods like photoactivation or allosteric modulation, holds promise for drug discovery and enzyme optimization.