MtoZ Biolabs - Model n-terminal-sequence-analysis-using-ms -MS-Based Protein N-Terminal Sequence Analysis Service
Mass spectrometry N-terminal sequence analysis is a method that utilizes mass spectrometry technology to efficiently and accurately determine the amino acid sequence of the N-terminus of proteins/peptides. Due to its high sensitivity, high resolution, and high throughput, it can be used to analyze complex protein/peptide mixtures, as well as identify modifications, mutations, and other sequence variations. Compared to traditional Edman degradation, mass spectrometry offers higher throughput and sensitivity, enabling the analysis of more complex samples and larger proteins.
Based on high-resolution mass spectrometry for N-terminal sequencing, the sample is processed with SDS-PAGE to separate the target protein followed by enzyme digestion. The digested products are analyzed using a Q-Exactive series mass spectrometer (Thermo Fisher Scientific), with peptide fragments in the mass spectrum breaking down into b and y ions' secondary mass spectra. By comparing these spectra with the theoretical amino acid sequence of the protein, the N-terminal position of the protein is determined. MtoZ Biolabs combines high-performance liquid chromatography and high-resolution mass spectrometry, based on the principle of N-terminal sequencing, to establish a mass spectrometry-based N-terminal sequence analysis platform, providing you with high-quality mass spectrometry N-terminal sequence analysis services. We use two different proteolytic cleavage methods to produce two different lengths of N-terminal peptide segments, which are mutually verified to finally determine the protein N-terminal sequence. Welcome your consult for more detailed information!
1. High-performance Liquid Chromatography Tandem Mass Spectrometer: High-performance Liquid Chromatograph-Easy-nLC 1200
2. Electrospray-hybrid Ion Trap Orbitrap Mass Spectrometer - Q Exactive™ Hybrid Quadrupole-Orbitrap™ Mass Spectrometer
1. High-resolution Mass Spectrometry-Based N-terminal Sequencing for Analysis of N-terminal Capping and Post-translational Modifications (PTMs), Determining the Protein N-terminal Starting Point
2. Support for N-terminal Dimethylation Labeling in Complex Proteins by our Company, Involving Analysis of Labeling Positions to Determine the N-terminal Starting Points in Complex Protein Samples
N-terminal Amino Acid Sequence Analysis of a Protein Drug Sample:
After trypsin digestion, the sample is analyzed by LC-MS/MS, and the mass spectrometry data is matched with a theoretical database, obtaining an MS2 spectrum consistent with the theoretical N-terminal sequence (HYAHVDCPGHADYVK), as shown below:
From the analysis above, it can be concluded that the N-terminal starting amino acid of this protein drug is histidine, with the N-terminal sequence as HYAHVDCPGHADYVK.
1. Experimental Procedures
2. Mass Spectrometric Parameters
3. Detailed Information on Mass Spectrometry N-terminal Sequence Analysis
4. Mass Spectrometric Images
5. Raw Data
MtoZ Biolabs is an integrate contract research organization (CRO) providing advanced proteomics, metabolomics, bioinformatics, and biopharmaceutical analysis services to researchers in biochemistry, biotechnology, and biopharmaceutical fields. The name of MtoZ represents “mass to charge ratio” in mass spectrometry analysis, as most of our services are provided based on our well-established mass spectrometry platforms. Our services allow for the rapid and efficient development of research projects, including protein analysis, proteomics, and metabolomics programs.
MtoZ Biolabs is specialized in quantitative multiplexed proteomics and metabolomics applications through the establishment of state-of-the-art mass spectrometry platforms, coupled with high-performance liquid chromatography technology. We are committed to developing efficient, and effective tools for addressing core bioinformatics problems. With a continuing focus on quality, MtoZ Biolabs is well equipped to help you with your needs in proteomics, metabolomics, bioinformatics, and biopharmaceutical research. Our ultimate aim is to provide more rapid, high-throughput, and cost-effective analysis, with exceptional data quality and minimal sample.
Email: marketing@mtoz-biolabs.com