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Related Experiment Videos

Simple sequence repeats in proteins and their significance for network evolution.

John M Hancock1, Michelle Simon

  • 1Bioinformatics Group, MRC Mammalian Genetics Unit, Harwell, Oxfordshire OX11 0RD, UK. J.Hancock@har.mrc.ac.uk

Gene
|February 18, 2005
PubMed
Summary

Simple sequence repeats (SSRs) are abundant in genomes and proteins. Their evolution and length changes may impact protein interaction networks and evolution.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Mammalian genomes consist mainly of non-coding elements like transposable elements and simple sequence repeats (SSRs).
  • SSRs are also found in protein sequences, sometimes encoded by DNA SSRs, and are prevalent in functional classes like transcription factors and protein kinases.

Purpose of the Study:

  • To conceptualize the evolutionary origins and fixation of protein SSRs.
  • To explore the potential impact of protein SSR emergence and length variation on protein interaction network topology.

Main Methods:

  • Analysis of existing literature on SSRs in DNA and protein sequences.
  • Conceptual modeling of SSR evolution and its functional implications.

Main Results:

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  • Protein SSRs, particularly those encoded by pure codon repeats, exhibit rapid evolution.
  • SSRs encoded by mixed codons evolve more slowly.
  • The presence and length of protein SSRs are linked to specific protein functional classes.

Conclusions:

  • Protein SSRs play a significant role in protein evolution and function.
  • Changes in protein SSRs can influence the structure and dynamics of protein interaction networks.