title: Identification of C10 biotinylated camptothecin (CPT-10-B) binding peptides using T7 phage display screen on a QCM device.
abstract: A peptide sequence that can bind to camptothecin (CPT), a natural cytotoxic compound, was screened for using a T7 phage display system combined with a cuvette type quartz crystal microbalance (QCM) device. In this screen, after only 10min of monitoring of the interaction between injected T7 phage pool with immobilized C10 biotinylated CPT (CPT-10-B) on a gold electrode surface, six different kinds of phage (A-F) were identified as judged by the size of PCR product on agarose gel electrophoresis. Injection of each single phage (A-E) pool individually caused a frequency decrease, suggesting interaction with the immobilized CPT-10-B. In addition, the peptide sequence displayed on phages A-C is consistent with chemical and biological studies of the interaction of CPTs with topoisomerase I (TopI), human E prostanoid receptor third cytoplasmic polypeptide, and a series of esterases. The efficacy of T7 phage display screening for small molecules on QCM devices, target discovery from primary peptide sequence, and application of this strategy to various drug-like small molecules are discussed.
authors: Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
authors: Yoichi
authors: Y
authors: Takakusagi
authors: Kaori
authors: K
authors: Takakusagi
authors: Kouji
authors: K
authors: Kuramochi
authors: Susumu
authors: S
authors: Kobayashi
authors: Fumio
authors: F
authors: Sugawara
authors: Kengo
authors: K
authors: Sakaguchi
mesh_terms: D000595:Amino Acid Sequence; D000970:Antineoplastic Agents; D017123:Bacteriophage T7; D015374:Biosensing Techniques; D001710:Biotin / Q000737:chemistry*; D019921:Biotinylation; D002166:Camptothecin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D006801:Humans; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D019151:Peptide Library; D010455:Peptides / Q000737:chemistry* / Q000378:metabolism; D011485:Protein Binding
chemical_list: D000970:Antineoplastic Agents; C526467:CPT-10-B; D019151:Peptide Library; D010455:Peptides; D001710:Biotin; D002166:Camptothecin