Back to Search
Start Over
Unbinding events of amino acids and peptides from water–pyrite interfaces: A case study of life’s origin on mineral surfaces
- Source :
- Biophysical Chemistry. 260
- Publication Year :
- 2020
-
Abstract
- Selective binding of aqueous-phase amino acids to mineral surfaces is regarded as a plausible first step in oligopeptide formation on early Earth. To clarify the strength and underlying mechanism of amino acid binding to pyrite surfaces, we measured the unbinding (pull-off) force of ten amino acids and two oligo-peptides from water-pyrite interfaces using atomic force microscopy (AFM). The most probable unbinding force could be described by a linearly increasing function with the size of the amino acid and a characteristic offset. A good correlation was obtained between the most probable unbinding force and the residue volume, surface area and polarizability of samples suggesting at least a partial contribution of van der Waals (vdW) forces, especially the London dispersion force. These results are useful in analysis of adhesion phenomena of amino acids in the given environmental settings such as in this work.
- Subjects :
- Surface Properties
Iron
Biophysics
Sulfides
engineering.material
Biochemistry
London dispersion force
Residue (chemistry)
symbols.namesake
Polarizability
Abiogenesis
Amino Acids
Particle Size
chemistry.chemical_classification
Minerals
Molecular Structure
Chemistry
Organic Chemistry
Water
Amino acid
Chemical physics
engineering
symbols
Pyrite
Amino acid binding
van der Waals force
Peptides
Subjects
Details
- Language :
- English
- ISSN :
- 03014622
- Volume :
- 260
- Database :
- OpenAIRE
- Journal :
- Biophysical Chemistry
- Accession number :
- edsair.doi.dedup.....47f14fb8cbe69c8f2982d95c56588dd5