Jul 29, 2003

Development of homochiral peptides in the chemical evolutionary process: Separation of homochiral and heterochiral oligopeptides

Chirality
Toratane Munegumi, Akira Shimoyama

Abstract

Living organisms have one-handed structures of L-amino acids in proteins and D-sugars in nucleic acids. Although the origins of each one-handed structure (or homochirality) have been discussed for many years, these discussions have been restricted to monomeric compounds, such as amino acids and monosaccharides, or their stereospecific condensation reactions. Oligomers of these compounds have to be considered in the accumulation processes of homochirality because of the differences in physical properties of the diastereomers. High-performance liquid chromatography (HPLC) and the calculation of the partition coefficient values showed that the peptides having heterochiral sequences like L-Ala-D-Ala or D-Ala-L-Ala were more hydrophobic than the peptides having homochiral ones (L-Ala-L-Ala and D-Ala-D-Ala). Similar results were given from the calculation of most linear dipeptides and all cyclic ones composed of Gly, Ala, Val, or Asp. In addition, longer homo-oligopeptides composed of Ala, Val, or Asp also gave similar results. This general tendency would be useful for the separation of diastereomeric oligopeptides in water. The results also suggest that the separation of the homochiral peptides from the heterochiral ones by their so...Continue Reading

  • References10
  • Citations6

References

  • References10
  • Citations6

Citations

Mentioned in this Paper

Molecular Stereochemistry
Amino Acids, I.V. solution additive
Oligopeptides
D-Ala-D-Ala
Abufne
High Pressure Liquid Chromatography Procedure
Organism
Genus Homo
Polypeptides
Nucleic Acids

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