Adaptive Threonine Increase in Mitochondrial Proteins of Higher Primates
Author Information
Author(s): Kitazoe Yasuhiro, Kishino Hirohisa, Hasegawa Masami, Nakajima Noriaki, Thorne Jeffrey L., Tanaka Masashi
Primary Institution: Center of Medical Information Science, Kochi Medical School, Nankoku, Kochi, Japan
Hypothesis
Did adaptive evolution lead to an increase in threonine residues in mitochondrial proteins in higher primates?
Conclusion
The increase in threonine residues in mitochondrial proteins of higher primates may enhance protein stability and is correlated with longevity.
Supporting Evidence
- The study shows a significant correlation between threonine composition and longevity in primates.
- Threonine residues are proposed to stabilize mitochondrial proteins by enhancing helix-helix interactions.
- The increase in threonine is linked to a decrease in hydrophobic amino acids in mitochondrial proteins.
Takeaway
This study found that higher primates have more threonine in their mitochondrial proteins, which might help them live longer by making their proteins more stable.
Methodology
Phylogenetic analysis and regression analysis were used to study amino acid composition changes in mitochondrial proteins.
Limitations
The study primarily focuses on mitochondrial proteins and may not account for other factors influencing longevity.
Statistical Information
P-Value
1.123×10−5
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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