Real-Time Study of the Modification of the Peptide Bond by Atomic Calcium

Strong chemical interaction between bacterial surface protein layers and calcium atoms deposited in situ on top was revealed by means of photoemission spectroscopy. The interaction appears to mainly happen at the oxygen site of the peptide bonds and involves a large charge transfer from Ca 4s states...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2011-03, Vol.115 (10), p.2401-2407
Main Authors: Kummer, Kurt, Vyalikh, Denis V, Blüher, Anja, Sivkov, Victor, Maslyuk, Volodymyr V, Bredow, Thomas, Mertig, Ingrid, Mertig, Michael, Molodtsov, Serguei L
Format: Article
Language:English
Subjects:
B: Biophysical Chemistry
Bacillus
Bacterial Proteins - chemistry
Bacterial Proteins - metabolism
Calcium - chemistry
Calcium - metabolism
Kinetics
Models, Molecular
Molecular Conformation
Peptides - chemistry
Photoelectron Spectroscopy
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Summary:Strong chemical interaction between bacterial surface protein layers and calcium atoms deposited in situ on top was revealed by means of photoemission spectroscopy. The interaction appears to mainly happen at the oxygen site of the peptide bonds and involves a large charge transfer from Ca 4s states into the peptide backbone. Chemical kinetics of this reaction was characterized using time-dependent valence band photoemission, and the reaction rate constant was determined.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp109555j