TY - GEN A1 - Schwaar, Timm T1 - MALDI-Supported Screening of Large Peptide Libraries for Identification of Protein Binders N2 - Screening of one-bead-one-peptide libraries is a powerful analytical tool for the identification of protein ligands. However, the traditional peptide screening procedure involves tedious steps such as manual selection, sequencing, and characterization. We present a high-throughput “all in one chip” system, allowing the screening of a high number of resin beads in short time. Here, beads of a combinatorial one-bead one compound peptide library are immobilized on an in-house produced chip, on which every bead has a well-defined position. The chip is then incubated with a fluorophore-labeled protein, identifying suitable peptides by a high-resolution fluorescence scan. The screening is followed by MALDI-MS experiments directly on the respective glass chip. To circumvent the need for peptide fragmentation normally used for peptide de novo sequencing, which can result in incomplete sequence information, an approach based on ladder sequencing has been used. This allows the peptide sequence identification by fragmentation-free MS with almost 100 % accuracy. For this purpose, a software tool was developed automatically translating MALDI-MS spectra into the corresponding peptide sequences. T2 - ANAKON CY - Münster, Germany DA - 25.03.2019 KW - OBOC KW - Peptide library KW - Combinatorial screening PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/47744 AN - OPUS4-47744 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany