Yong Fu , Yangguang Xu , Maodan Zhang, Fengjuan Lv
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引用次数: 0
摘要
信号肽（SP）是重组蛋白分泌所必需的，通常由信号肽酶在其 C 区裂解生成成熟蛋白。偶尔也有报道称信号肽会被误解，导致末端序列被截短或拉长。在本研究中，我们通过一个案例研究证明了阳离子交换色谱法（CEX）是去除SP变体的有效方法。在选定的树脂/条件下，在低端和高端负载密度和洗脱范围内进行的色谱运行性能相当。这项工作中描述的程序可作为选择树脂和优化色谱条件的通用方法，以去除与所选树脂结合力比产品更强的副产物。
Removal of signal peptide variants by cation exchange chromatography: A case study
Signal peptide (SP) is required for secretion of recombinant proteins and typically cleaved by signal peptidase at its C-region to generate the mature proteins. Miscleavage of the SP is reported occasionally, resulting in a truncated- or elongated-terminal sequence. In the present work, we demonstrated that cation exchange (CEX) chromatography is an effective means for removing SP variants with a case study. With the selected resin/conditions, the chromatographic performance is comparable between runs performed at the low end and high end of load density and elution range. The procedure described in this work can be used as a general approach for resin selection and optimization of chromatographic conditions to remove byproducts that bind more strongly than the product to the selected resin.
期刊介绍：
Protein Expression and Purification is an international journal providing a forum for the dissemination of new information on protein expression, extraction, purification, characterization, and/or applications using conventional biochemical and/or modern molecular biological approaches and methods, which are of broad interest to the field. The journal does not typically publish repetitive examples of protein expression and purification involving standard, well-established, methods. However, exceptions might include studies on important and/or difficult to express and/or purify proteins and/or studies that include extensive protein characterization, which provide new, previously unpublished information.
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