"Strohalm, Martin" . . "P(GA203/02/0922), Z(MSM 223300006)" . . . . . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry" . "5"^^ . . . "5"^^ . . . "6"^^ . . "MALDI-TOF mass spectrometry;Nitration;Iodination;Solvent accessibility;Surface mapping"@en . "Amino acid residue-specific reactivity in proteins is of great current interest in structural biology as it provides information about solvent accessibility and reactivity of the residue and, consequently, about protein structure and possible interactions. In the work presented tyrosine residues of three model proteins with known spatial structure are modified with two tyrosine-specific reagents: tetranitromethane and iodine. Modified proteins were specifically digested by proteases and the mass of resulting peptide fragments was determined using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Our results show that there are only small differences in the extent of tyrosine residues modification by tetranitromethane and iodine. However, data dealing with accessibility of reactive residues obtained by chemical modifications are not completely identical with those obtained by nuclear magnetic resonance and X-ray crystallography. These interesting discrepancies can be caused"@cs . . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry"@cs . "Kadl\u010D\u00EDk, Vojt\u011Bch" . "BE - Belgick\u00E9 kr\u00E1lovstv\u00ED" . "Amino acid residue-specific reactivity in proteins is of great current interest in structural biology as it provides information about solvent accessibility and reactivity of the residue and, consequently, about protein structure and possible interactions. In the work presented tyrosine residues of three model proteins with known spatial structure are modified with two tyrosine-specific reagents: tetranitromethane and iodine. Modified proteins were specifically digested by proteases and the mass of resulting peptide fragments was determined using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Our results show that there are only small differences in the extent of tyrosine residues modification by tetranitromethane and iodine. However, data dealing with accessibility of reactive residues obtained by chemical modifications are not completely identical with those obtained by nuclear magnetic resonance and X-ray crystallography. These interesting discrepancies can be caused"@en . "RIV/60461373:22330/04:00012917" . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry"@en . . "9" . . . . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry"@cs . "1151-1156" . . "0006-291X" . "[1D0CDD034B66]" . "22330" . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry"@en . . . "Tyrosine residues modification studied by MALDI-TOF mass spectrometry" . "Biochemical and Biophysical Research Communication" . . . "591122" . "Kod\u00ED\u010Dek, Milan" . "RIV/60461373:22330/04:00012917!RIV/2005/GA0/223305/N" . "323" . . . "Hynek, Radovan" . . "Amino acid residue-specific reactivity in proteins is of great current interest in structural biology as it provides information about solvent accessibility and reactivity of the residue and, consequently, about protein structure and possible interactions. In the work presented tyrosine residues of three model proteins with known spatial structure are modified with two tyrosine-specific reagents: tetranitromethane and iodine. Modified proteins were specifically digested by proteases and the mass of resulting peptide fragments was determined using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Our results show that there are only small differences in the extent of tyrosine residues modification by tetranitromethane and iodine. However, data dealing with accessibility of reactive residues obtained by chemical modifications are not completely identical with those obtained by nuclear magnetic resonance and X-ray crystallography. These interesting discrepancies can be caused" . "\u0160antr\u016F\u010Dek, Ji\u0159\u00ED" .