Resources

Proteomics Databases



Metabolomics Databases

• • MS Based N-Terminal Sequencing Analysis: Applications in Biopharmaceutical Research

  In proteomics, N-terminal sequencing analysis is primarily used to characterize the N-terminal amino acid sequence of proteins and peptides, providing critical data for investigating post-translational modifications, protein degradation pathways, and structural characteristics. The conventional Edman degradation method has inherent limitations, including stringent sample quantity requirements and susceptibility to protein characteristics, which restricts its application to complex samples or proteins ......

• • N-Terminal Sequencing Using Edman Degradation: Advantages, Limitations and Improvements

  N-terminal sequencing is a fundamental technique in proteomics research, with Edman Degradation long recognized as a classical method for determining the N-terminal sequence of proteins and peptides. This method relies on the selective labeling of the N-terminal amino acid by phenylisothiocyanate (PITC), followed by stepwise degradation to sequentially identify amino acids. Despite the rapid advancements in mass spectrometry-based sequencing technologies in recent years, Edman Degradation retains uniq......

• • C-Terminal Sequencing Based on MS: Methods and Applications

  C-terminal sequencing is a technique specifically designed to determine the amino acid sequence at the C-terminus of proteins and holds significant value in proteomics research. Compared with traditional N-terminal sequencing, C-terminal sequencing has emerged relatively late due to its greater technical complexity. However, the rapid advancement of mass spectrometry (MS) technologies in recent years has significantly increased the importance of C-terminal sequencing based on MS in studies of protein ......

• • The Ultimate Guide to N-Terminal Sequencing: Significantly Increase Protein Analysis Efficiency

  N-terminal sequencing is a widely adopted approach for elucidating the primary structure of proteins. It plays a crucial role in proteomics, biomedicine, and structural biology. High-efficiency and high-accuracy sequencing not only facilitates the identification of translation initiation sites, post-translational modifications, and degradation pathways, but also enables more precise quality control in biopharmaceutical production. To achieve optimal sequencing performance, it is essential to refine mu......

• • N-Terminal Sequencing Using Edman Degradation: How to Optimize Your Experiment for Accurate Results

  N-terminal sequencing using edman degradation is a classical technique, which sequentially removes and identifies amino acids from the N-terminus of proteins or peptides. Despite its high specificity, sequencing accuracy can be significantly compromised by factors such as sample quality, reaction efficiency, and background interference. Therefore, experimental optimization is critical. This review outlines strategies for optimizing sample preparation, reaction conditions, analytical detection, and err......

• • Overview of N-Terminal Sequencing: Embarking on a New Journey in Proteomics

  In protein structures, the N-terminus (amino terminus) serves as both the starting point of polypeptide synthesis and a crucial regulatory domain influencing protein folding, localization, post-translational modifications, and degradation. As proteomics advances, N-terminal sequencing has transitioned from a fundamental sequencing tool into a pivotal approach for elucidating dynamic protein regulatory networks, enabling more sophisticated insights into protein biology. Beyond its role as a marker of t......

• • 5 Golden Points to Learn N-Terminal Sequencing Quickly

  N-terminal sequencing is employed to determine the N-terminal amino acid sequence of proteins or peptides. Throughout the sequencing process, the 5 golden points are critical for achieving high sequencing accuracy and reliability.   1. Ensuring Sample Purity: Minimizing Impurity Interference N-terminal sequencing requires highly purified samples, as the presence of impurities can cause overlapping sequencing signals, thereby compromising sequence resolution. Sample purity directly influences labeling ......

• • How to Choose the Right C-Terminal Sequencing Method? Key Factors Explained

  In proteomics research, precise characterization of N-terminal and C-terminal sequences is essential for elucidating protein functions, post-translational modifications, and degradation pathways. Compared to the N-terminus, sequencing the C-terminus has traditionally posed greater challenges due to the absence of conserved recognition motifs, fewer chemical modifications, and greater structural heterogeneity. However, advancements in mass spectrometry and chemical labeling techniques have significantl......

• • Shotgun Protein Sequencing

  Shotgun protein sequencing is a prominent technique utilized in proteomics for the rapid and comprehensive analysis of complex protein mixtures. Analogous to shotgun genomic sequencing, this method focuses on the identification and quantification of all proteins within a sample through random digestion and subsequent analysis. The technique's core involves the use of mass spectrometry to analyze peptide fragments produced by enzymatic digestion of proteins. Its applications are extensive, spanning bas......

• • Phosphorylation Detection

  Phosphorylation detection is a technique for studying the phosphorylation state of proteins. As one of the most common and significant post-translational modifications (PTMs), phosphorylation regulates protein functions by adding phosphate groups to specific amino acid residues such as serine, threonine, and tyrosine. This modification is facilitated by protein kinases, while phosphatases catalyze dephosphorylation. Due to its dynamic and reversible nature, phosphorylation plays a crucial role in vari......