title: Composition and antimicrobial activity of the skin peptidome of Russian brown frog Rana temporaria.
abstract: A nano-HPLC-ESI-OrbiTrap study involving HCD and ETD spectra has been carried out to clarify the composition of the skin peptidome of brown Russian frogs Rana temporaria. This approach allowed determinantion of 76 individual peptides, increasing 3-fold the identified portion of the peptidome in comparison to that obtained earlier with FTICR MS. A search for the new bradykinin related peptides (BRPs) was carried out by reconstructing mass chromatograms based on the ion current of characteristic b- and y-ions. Several peptides were reported in the secretion of R. temporaria for the first time. The overall antibacterial activity of the skin secretion in general and of one individual peptide (Brevinin 1Tb) was determined using PMEU Spectrion (Portable Microbe Enrichment Unit) technology. The inhibitory effects of these peptides on Staphylococcus aureus and Salmonella enterica Serovar typhimutium were equal in scale to that reported for some antibiotics.
authors.affiliation: Organic chemistry Department, Moscow State University, Moscow, Russia.
authors.forename: T Yu
authors.initials: TY
authors.lastname: Samgina
authors.forename: E A
authors.initials: EA
authors.lastname: Vorontsov
authors.forename: V A
authors.initials: VA
authors.lastname: Gorshkov
authors.forename: E
authors.initials: E
authors.lastname: Hakalehto
authors.forename: O
authors.initials: O
authors.lastname: Hanninen
authors.forename: R A
authors.initials: RA
authors.lastname: Zubarev
authors.forename: A T
authors.initials: AT
authors.lastname: Lebedev
mesh_terms: D000595:Amino Acid Sequence; D029845:Amphibian Proteins / Q000378:metabolism*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000302:isolation & purification* / Q000378:metabolism / Q000494:pharmacology; D023181:Antimicrobial Cationic Peptides / Q000378:metabolism*; D012634:Bodily Secretions / Q000378:metabolism*; D001920:Bradykinin / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D008969:Molecular Sequence Data; D036103:Nanotechnology; D010455:Peptides / Q000032:analysis* / Q000378:metabolism; D011896:Rana temporaria / Q000378:metabolism*; D012486:Salmonella typhimurium / Q000187:drug effects / Q000254:growth & development; D012867:Skin / Q000378:metabolism*; D013045:Species Specificity; D013211:Staphylococcus aureus / Q000187:drug effects / Q000254:growth & development
chemical_list: D029845:Amphibian Proteins; D000900:Anti-Bacterial Agents; D023181:Antimicrobial Cationic Peptides; D010455:Peptides; C078413:brevinin-1 protein, Rana; D001920:Bradykinin