Trap column-based intact mass spectrometry for rapid and accurate evaluation of protein molecular weight.
Gyu-Min LimByung Gee KimHee-Jin JeongPublished in: RSC advances (2022)
The determination of the molecular weight (MW) of a protein using high-resolution mass spectrometry (MS) is a crucial tool used to confirm whether the protein was correctly expressed and adequately purified. However, a non-volatile buffer is normally used for protein purification and storage. Therefore, a pre-treatment step using ultrafiltration (UF) is required to exchange the buffer with a volatile buffer prior to the introduction of the protein sample into the MS equipment. This pre-treatment step is time-consuming. In this study, a trap column-based pre-treatment method applied in a nano-LC system was developed for rapid and convenient analysis of the MW of proteins. First, the trap column system was compared with the conventional UF treatment system and non-treatment system using bovine serum albumin. Subsequently, the trap column system was applied to analyze the MW of commercially available and lab-synthesized recombinant proteins. The intensity of the base peak and signal-to-noise ratio of the trap column-based pre-treated protein were higher than those of the UF-treated protein. Moreover, the entire automated procedure of the trap column-based system was conducted within 20 min, which confirms its use in versatile and accurate protein identification.
Keyphrases
- liquid chromatography
- mass spectrometry
- high resolution mass spectrometry
- protein protein
- amino acid
- solid phase extraction
- binding protein
- multiple sclerosis
- ms ms
- machine learning
- small molecule
- minimally invasive
- tandem mass spectrometry
- high throughput
- single cell
- high performance liquid chromatography
- newly diagnosed
- quantum dots