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Mass spectrometric study of peptides secreted by the skin glands of the brown frog Rana arvalis from the Moscow region
Author(s) -
Samgina T. Yu.,
Artemenko K. A.,
Gorshkov V. A.,
Ogourtsov S. V.,
Zubarev R. A.,
Lebedev A. T.
Publication year - 2009
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.3994
Subject(s) - chemistry , peptide , electrospray ionization , mass spectrometry , chromatography , cystine , high performance liquid chromatography , rana ridibunda , dissociation (chemistry) , amino acid , biochemistry , zoology , cysteine , organic chemistry , biology , enzyme
A high‐performance liquid chromatography nano‐electrospray ionization Fourier transform mass spectrometry (HPLC/nanoESI‐FTMS) approach involving recording of collision‐activated dissociation (CAD) and electron‐capture dissociation (ECD) spectra of an intact sample and two its modifications after performic oxidation and reduction followed by carboxamidomethylation helps to establish peptide profiles in the crude secretion of frog species at mid‐throughput level, including de novo sequencing. The proposed derivatization procedures allow increasing of the general sequence coverage in the backbone, providing complementary information and, what is more important, reveal the amino acid sequence in the cystine ring (‘rana box’). Thus purely mass spectrometric efficient sequencing becomes possible for longer than usual proteolytic peptides. Seventeen peptides belonging to four known families were identified in the secretion of the European brown frog Rana arvalis inhabiting the Moscow region in Russia. Ranatuerins, considered previously a unique feature of the North American species, as well as a new melittin‐related peptide, are worth special mention. The developed approach was previously successfully used for the identification of peptides in the skin secretion of the Caucasian green frog Rana ridibunda . Copyright © 2009 John Wiley & Sons, Ltd.