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学科主题: 物理化学
题名: CD bonded stationary phase in phosphopeptide fractionation and enrichment
作者: Zhao YY(赵艳艳) ;  Li XL(李秀玲) ;  Yan JY(闫竟宇) ;  Liang XM(梁鑫淼) ;  Zhang YK(张玉奎)
会议名称: 24th International Symposium on Microscale Bioseparations
会议日期: 2009-10-18
出版日期: 2009-10-18
会议地点: 中国
其他题名: 环糊精键合固定相在磷酸化肽分段和富集的应用
通讯作者: 李秀玲 ;  梁鑫淼
部门归属: 十八室
主办者: 中国科学院大连化物所
摘要: eversible protein phosphorylation regulates many significant cellular processes. Identification of the phosphorylation sites is vital to elucidate their biofunctions. To aid in phosphoproteome characterization, selective enrichent method, such as IMAC and TiO2, have been developed. However,high pH elution step is always used, which may degrade phosphopeptides. Furthermore, multiphosphopeptides bind strongly on TiO2 and are difficult to elute. More selective enrichment methods should be developed for phosphopeptide separation. Click CD stationary phase was synthesized and used to fractionate and enrich phosphopeptides in HILIC mode. Both fractionation and solid phase extraction (SPE) were carried out for separating phopshopeptides from tryptic α-casein. In fractionation, phosphopeptides are separated according to polarity, which is different from that with SCX or SAX. Phosphopeptides with same charge could be well resolved with the method. In SPE, CD stationary phase has similar selectivity to that with commercial TiO2. Furthermore, multiphosphopeptides could be well enriched and easily eluted from CD stationary phase, which are often unable to detect with TiO2. It is worthy of note that the whole enrichment process was carried out under low PH, which could avoid degradation of phosphopeptides. We demonstrate that the CD stationary phase be complementary to conventional method in phosphopeptide fractionation and enrichment.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/113886
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Zhao YY,Li XL,Yan JY,et al. CD bonded stationary phase in phosphopeptide fractionation and enrichment[C]. 见:24th International Symposium on Microscale Bioseparations. 中国. 2009-10-18.
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