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ESI-MS Studies of Silver Ion Competitive Interaction with Cysteine-Containing Peptides and Sulfur-Containing Amino Acids

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The paper deals with investigation of silver ion interaction with sulfur-bearing amino acids and cysteinebearing peptides using an electrospray ionisation orthogonal ion introduction time-of-flight (ESI-o-TOF) mass spectrometer. It has been shown that Cys and Hcy demonstrate the largest affinity for silver, both in relation to methionine and cysteine residues in peptides. The studies have for the first time revealed the effect of predominant forming of ions containing two silver atoms per a sulfhydryl group of cysteine-bearing peptides if the nearest microenvironment does not hinder this.

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Keywords: (Cys); (ESI-MS); (Hcy); (Met); AgNO3; D,L-homocysteine; ESI-O-TOF; HCy; IAI RAS; Ion Types; Mass Spectrometry; P2; Sulfur-bearing amino acids; TFA; affinity; amino; argyria; bactericidal; cysteine-bearing; cysteine-bearing peptides; isotopi; silver

Document Type: Research Article

Publication date: 2010-11-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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