Institut des Biomolécules Max Mousseron, UMR 5247 CNRS, Universités Montpellier 1 et 2, Montpellier, France.
Proteomics. 2009 Dec;9(23):5384-8. doi: 10.1002/pmic.200900562.
We designed a new cross-linker bearing a CHCA moiety. The use of the CHCA-tagged cross-linker JMV 3378 in conjunction with a neutral MALDI matrix alpha-cyano-4-hydroxycinnamic methyl ester enabled specific signal enhancement in MALDI-TOF MS of cross-link containing peptides. Discrimination between modified and non-modified peptides can be achieved by comparison of two spectra, one using CHCA and the other using the alpha-cyano-4-hydroxycinnamic methyl ester matrix. The methodology was validated using cytochrome c and apo-myoglobine as model proteins.
我们设计了一种带有 CHCA 部分的新型交联剂。在 MALDI-TOF MS 中,使用带有 CHCA 标记的交联剂 JMV 3378 与中性 MALDI 基质 alpha-氰基-4-羟基肉桂酸甲酯结合,可以特异性增强交联肽的信号。通过比较使用 CHCA 和使用 alpha-氰基-4-羟基肉桂酸甲酯基质的两个光谱,可以实现对修饰和非修饰肽的区分。该方法使用细胞色素 c 和脱辅基肌红蛋白作为模型蛋白进行了验证。