摘要
结合基质辅助激光解吸飞行时间质谱(MALDI-TOFMS)检测技术,考察了Ti-SBA-15介孔材料对β-酪蛋白酶解产物中磷酸化肽的选择性富集性能。实验结果显示,含Ti和Si物质的量比为0.08的Ti-SBA-15介孔材料可选择性地对β-酪蛋白酶解产物中的磷酸化肽进行选择性富集;对于β-酪蛋白和牛血清白蛋白物质的量比为1:100的蛋白质酶解混合液,Ti-SBA-15仍能实现对其磷酸化肽的有效富集。上述结果表明,作为一种多孔、高比表面积的磷酸化多肽的选择性吸附材料,Ti-SBA-15有望在磷酸化蛋白质组的分析中得到广泛的应用。
A titanium-incorporated SBA-15mesoporous material（Ti-SBA-15） was synthesized via the co-condensation of tetraethyl orthosilicate（TEOS） and tetrabutyl titanate using surfactant P123 as the template.Due to the existence of Ti in the framework of SBA-15,the synthesized Ti-SBA-15 was applied as the selective adsorbent of phosphopeptides from the complex tryptic digest of β-casein.The matrix assisted laser desorption/ionization time of flight mass spectrometry（MALDI-TOF MS） analysis showed that the phosphopeptides of β-casein digest could be selectively enriched by the Ti-SBA-15 with Ti/Si molar ratio of 0.08,even under the interference of bovine serum albumin（BSA） with the molar ratio of β-casein to BSA up to 1∶100.It can be concluded that the Ti-SBA-15 showed the specific adsorption toward the phosphorylated peptides,which provides great potential in the specific capture of phosphopeptides.
出处
《色谱》
CAS
CSCD
北大核心
2010年第2期123-127,共5页
Chinese Journal of Chromatography
基金
国家自然科学基金项目(No.20735004)
关键词
Ti-SBA-15介孔材料
磷酸化肽
选择性富集
基质辅助激光解吸飞行时间质谱
titanium-incorporated SBA-15 mesoporous material（Ti-SBA-15）
phosphopeptides
selective enrichment
matrix assisted laser desorption/ionization time of flight mass spectrometry（MALDI-TOF MS）
