申请人:Raines Ronald T.
公开号:US20080020942A1
公开(公告)日:2008-01-24
Methods and reagents for site-selective functionalization of peptides and proteins. The methods most generally involve the reaction of a thioester with hydrazine. Reagents include bifunctional reagents of formula:
H
2
N—NH—CH
2
-M-L-FG
and salts thereof where M is a single bond or a chemical group carrying a non-bonding electron pair, such as —C(O)NR′—, where R′ is H, or an alkyl or aryl group; L is an optional linker group as described above; and FG is a functional group having reactivity that is orthongonal to that of the hydrazine group. FG can, among others, be an azide, alkenyl, alkynyl, nitrile (—CN) or triazole group and is preferably an azide group (—N
3
). Methods and reagents can, for example, be combined with intein-mediated protein splicing to link proteins or fragments thereof to various chemical species or to a surface. Surface immobilization of proteins via the methods herein results in immobilized proteins which substantially retain biological activity and is thus useful for the generation of peptide or protein microarrays. Kits for functionalization and/or immobilization of peptides and proteins are provided as well as microarrays of peptides, proteins or both.
用于位点选择性肽和蛋白质的官能化的方法和试剂。这些方法通常涉及用肼与硫酯反应。试剂包括具有以下公式的双官能试剂:H2N—NH—CH2-M-L-FG和其盐,其中M是单键或带有非配对电子对的化学基团,例如—C(O)NR′—,其中R′是H,或者是烷基或芳基基团;L是可选的连接基团,如上所述;FG是具有与肼基反应不同的反应性的官能基团。FG可以是偶氮基,烯基,炔基,腈(—CN)或三唑基团等,最好是偶氮基(—N3)。例如,这些方法和试剂可以与肽内介导的蛋白质剪接结合,将蛋白质或其片段链接到各种化学物种或表面上。通过本文中所述的方法进行表面固定的蛋白质具有显著保留生物活性的特点,因此可用于生成肽或蛋白质微阵列。提供了用于肽和蛋白质的官能化和/或固定化的试剂盒以及肽、蛋白质或两者的微阵列。