Wydział Chemii

Remigiusz Bąchor

Marzena Cydzik

Magdalena Rudowska

Alicja Kluczyk

Piotr Stefanowicz

Zbigniew Szewczuk

2012

Molecular Diversity

16

613-618

10.1007/s11030-012-9377-y

Naukowa

Angielski

Artykuł

A rapid and straightforward method for high-throughput analysis of single resin beads from one-bead-one-compound combinatorial libraries with high resolution electrospray ionization tandem mass spectrometry (HR ESI-MS/MS) is presented. The application of an efficient method of peptide derivatization by quaternary ammonium salts (QAS) formation increases ionization efficiency and reduces the detection limit, allowing analysis of trace amounts of compounds by ESI-MS. Peptides, synthesized on solid support, contain a new cleavable linker composed of a Peg spacer (9-aza-3,6,12,15-tetraoxa-10-on-heptadecanoic acid), lysine with ɛ-amino group marked by the N,N,N-triethylglycine salt, and methionine, which makes possible the selective cleavage by cyanogen bromide. Even a small portion of peptides derivatized by QAS cleaved from a single resin bead is sufficient for sequencing by HR ESI-MS/MS experiments. The developed strategy was applied to a small training library of α chymotrypsin substrates. The obtained results confirm the applicability of the proposed method in combinatorial chemistry.

Derivatization of peptides, ESI-MS/MS, Fixed targe tag, Linker design, OBOC, Quanternary ammonium salts

http://dx.doi.org/10.1007/s11030-012-9377-y

http://link.springer.com