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Apolipoprotein E phylogeny and evolution.

Murat Kasap1, Ali Sazci, Gurler Akpinar

  • 1Department of Medical Biology and Genetics, Faculty of Medicine, Kocaeli University, Umuttepe, Kocaeli, Turkey. mkasap@vt.edu

Cell Biochemistry and Function
|February 1, 2007
PubMed
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Apolipoprotein E (Apo E) evolution was studied using molecular data. Frog Apo E is the likely ancestor, suggesting diet influences apolipoprotein evolution.

Area of Science:

  • Biochemistry
  • Evolutionary Biology
  • Molecular Biology

Background:

  • Apolipoprotein E (Apo E) is crucial for lipid transport and neural repair.
  • The evolutionary history of Apo E, particularly its ancient origins, remains largely uncharacterized.
  • Understanding Apo E evolution can provide insights into apolipoprotein function and adaptation.

Purpose of the Study:

  • To investigate the evolutionary relationships among Apo E proteins across diverse species.
  • To determine the ancestral origin of Apo E.
  • To explore potential factors influencing Apo E evolution.

Main Methods:

  • Phylogenetic analysis of Apo E protein sequences from 18 different organisms.
  • Utilized both character-based and distance-based phylogenetic methodologies.

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  • Constructed multiple phylogenetic trees to assess evolutionary relationships.

    • Main Results:

    • Phylogenetic analysis revealed that Apo E sequences from fish and frogs are distantly related to those of other species studied.
    • The Apo E protein of the frog was identified as the most probable ancestor among the 18 investigated organisms.
    • Species grouped by Apo E protein similarity often exhibited comparable feeding habits and dietary preferences.

    Conclusions:

    • The evolutionary trajectory of Apo E appears to be significantly shaped by the feeding environments and diets of organisms.
    • This finding suggests that dietary pressures may play a critical role in the evolution of apolipoproteins.
    • Further research into apolipoprotein evolution could illuminate adaptive mechanisms in response to ecological factors.