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Related Concept Videos

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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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 locations, protein...
Protein Families02:47

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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 locations, protein...
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Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

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Published on: August 14, 2018

Analyzing protein structure and function using ancestral gene reconstruction.

Michael J Harms1, Joseph W Thornton

  • 1Howard Hughes Medical Institute, Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, OR 97403, USA. harms@uoregon.edu

Current Opinion in Structural Biology
|April 24, 2010
PubMed
Summary
This summary is machine-generated.

Studying protein evolution requires understanding how mutations drive functional changes. Reconstructing ancestral proteins (vertical strategy) overcomes limitations of studying present-day proteins (horizontal strategy) for evolutionary insights.

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Last Updated: Jun 13, 2026

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Published on: July 14, 2015

Area of Science:

  • Molecular Biology
  • Evolutionary Biology
  • Biochemistry

Background:

  • Protein families exhibit functional diversity, offering insights into structure-function relationships and evolution.
  • Traditional horizontal approaches (swapping residues) face challenges due to complex, interacting mutations required for functional shifts.
  • Chimeric proteins often lack function, hindering the study of evolutionary pathways.

Purpose of the Study:

  • To introduce and advocate for the vertical strategy in studying protein functional diversification.
  • To highlight the advantages of ancestral gene reconstruction over horizontal methods.
  • To reveal the molecular basis of protein evolution and functional divergence.

Main Methods:

  • Reviewing existing literature on protein evolution studies.
  • Discussing the principles and advantages of the vertical strategy.
  • Highlighting exemplary studies employing ancestral gene reconstruction.

Main Results:

  • The vertical strategy effectively overcomes limitations of horizontal approaches in studying functional evolution.
  • Ancestral gene reconstruction provides a suitable genetic background for assessing historical mutations.
  • Key amino acid changes driving functional diversification can be identified through this method.

Conclusions:

  • Ancestral gene reconstruction (vertical strategy) is a powerful approach for understanding protein evolution.
  • This method elucidates the molecular underpinnings of protein structure, function, and diversification.
  • It offers a more robust framework for studying the historical trajectory of protein adaptation.