Process for preparing peptide nucleic acid probe using polymeric photoacid generator
申请人:——
公开号:US20020122874A1
公开(公告)日:2002-09-05
Disclosed is a process for preparing arrays of oligopeptide nucleic acid probes immobilized on a solid matrix by employing polymeric photoacid generator. Arrays of peptide nucleic acid probes of the invention are prepared by the steps of: (i) derivatizing the surface of a solid matrix with aminoalkyloxysilane in alcohol and attaching a linker with acid-labile protecting group on the solid matrix; (ii) coating the solid matrix with polymeric photoacid generator(PAG); (iii) exposing the solid matrix thus coated to light to generate acid for eliminating acid-labile protecting group; (iv) washing the solid matrix with alkaline solution or organic solvent and removing residual polymeric photoacid generator; and, (v) attaching a monomeric peptide nucleic acid with acid-labile protecting group to the solid matrix, and repeating the previous Steps of (ii) to (v). In accordance with the present invention, neutral peptide nucleic acid probes, as the promising substitute for conventional negatively-charged oligonucleotide probes, can be prepared by employing polymeric photoacid generator in a simple and efficient manner, while overcoming the problems confronted in the prior art DNA chip fabrication using PR system and PPA system.
本发明公开了一种使用聚合物光酸发生剂制备固定在固体基质上的寡肽核酸探针阵列的方法。发明的寡肽核酸探针阵列的制备步骤包括:(i)用醇类衍生氨基烷氧基硅烷使固体基质表面发生衍生化反应,并在固体基质上连接具有酸敏感保护基的连接剂;(ii)涂覆固体基质与聚合物光酸发生剂(PAG);(iii)将涂有聚合物光酸发生剂的固体基质暴露于光线下,产生酸性物质以消除酸敏感保护基;(iv)用碱性溶液或有机溶剂洗涤固体基质并去除残留的聚合物光酸发生剂;(v)将具有酸敏感保护基的单体寡肽核酸连接到固体基质上,并重复步骤(ii)至(v)。根据本发明,可以使用聚合物光酸发生剂以简单高效的方式制备中性寡肽核酸探针,作为传统负电荷寡核苷酸探针的有前途的替代品,同时克服了使用PR系统和PPA系统制造DNA芯片所面临的问题。