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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.
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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.
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Conservation of Protein Domains

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Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key...

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

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Whence Blobs? Phylogenetics of functional protein condensates.

Iva Pritišanac^1,2, Taraneh Zarin³, Julie D Forman-Kay^1,2

¹Program in Molecular Medicine, Hospital for Sick Children, Toronto, Canada.

Biochemical Society Transactions

|September 28, 2020

Summary

Protein condensation, crucial for cell function, evolves through natural selection acting on amino acid changes. This process shapes the weak interactions that drive the formation of biomolecular condensates.

Keywords:

adaptive evolution condensate formation evolutionary cell biology evolutionary genetics molecular evolution phase separation

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A Protocol for Computer-Based Protein Structure and Function Prediction

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Published on: November 3, 2011

Area of Science:

Biophysics
Molecular Biology
Evolutionary Biology

Background:

Proteins can form membrane-less biomolecular condensates through weak, transient interactions.
These condensates are essential for various cellular processes.
The molecular basis and evolution of this capacity are not fully understood.

Purpose of the Study:

To explore the molecular evolution of functional protein condensation.
To understand how natural selection shapes the properties of proteins that form condensates.

Main Methods:

Phylogenetic analysis of protein sequences.
Biophysical studies of protein-protein interactions.
Computational modeling of condensate formation.

Main Results:

Identified specific amino acid changes that influence protein condensation capacity.
Demonstrated that natural selection preserves or alters these changes based on cellular benefit.
Highlighted the link between protein sequence, weak interactions, and condensate formation.

Conclusions:

Protein condensation is an evolvable trait shaped by natural selection.
Understanding this evolution provides insights into cellular organization and function.
Further research at the interface of phylogenetics, biophysics, and cell biology is warranted.