title: Surface plasmon resonance imaging measurements of caspase reactions on peptide microarrays.
abstract: Enzymatic activity monitoring of caspases, which are a class of cysteine protease, was performed by using peptide arrays based on surface plasmon resonance (SPR) imaging. The strategy of the detection is straightforward, using streptavidin to amplify the SPR signals of the surface-immobilized substrate peptides labeled with biotin at the C termini. Thus, the cleavage of the substrate peptides by caspases was detected as a signal decrease. Using this method, we succeeded in monitoring the activities of purified caspases and caspases in cell lysates. The SPR imaging-based peptide array would be applicable to cell-based drug screening and biochemical studies to reveal signal transduction processes.
authors.affiliation: Graduate School of Systems Life Sciences, Kyushu University, Fukuoka 819-0395, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Inoue
authors.forename: Takeshi
authors.initials: T
authors.lastname: Mori
authors.forename: Go
authors.initials: G
authors.lastname: Yamanouchi
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Han
authors.forename: Tatsuhiko
authors.initials: T
authors.lastname: Sonoda
authors.forename: Takuro
authors.initials: T
authors.lastname: Niidome
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Katayama
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001710:Biotin / Q000378:metabolism; D016466:CHO Cells; D020169:Caspases / Q000378:metabolism*; D006224:Cricetinae; D003412:Cricetulus; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry; D040081:Protein Array Analysis / Q000379:methods*; D019311:Staurosporine / Q000494:pharmacology; D019809:Streptavidin / Q000378:metabolism; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D010455:Peptides; D001710:Biotin; D019809:Streptavidin; D020169:Caspases; D019311:Staurosporine