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Proteomics Databases



Metabolomics Databases

• • How to Prepare Samples for Histone Ubiquitination Analysis?

  Histone ubiquitination is a critical post-translational modification that plays essential roles in gene expression regulation, DNA repair, cell cycle control, and cancer progression. High-quality sample preparation is fundamental to obtaining reliable experimental data, as it helps preserve low-abundance ubiquitination signals while improving the accuracy and reproducibility of mass spectrometry and immunoassay-based analyses. Principles of Sample Selection and Processing Histone ubiquitination studi......

• • What Is C-Terminal Protein Sequencing?

  In protein research, the C-terminus (carboxyl terminus), in addition to the N-terminus (amino terminus), contains important biological information. C-terminal protein sequencing is an analytical approach dedicated to characterizing the amino acid sequence at the protein carboxyl terminus. This technique provides critical insights into protein maturation, post-translational modifications (PTMs), degradation pathways, and functional regulation. Concept of C-Terminal Protein Sequencing Proteins are line......

• • What Is N-Terminal Protein Sequencing?

  In life science research, proteins are not only the primary functional molecules within cells but also critical targets for disease investigation and drug development. To achieve a comprehensive understanding of protein structure and function, researchers have developed a variety of analytical techniques, among which N-terminal protein sequencing represents a fundamental and highly important approach. This technique enables precise characterization of the amino acid sequence at the protein N-terminus,......

• • What Is H2A Ubiquitination?

  Histone H2A ubiquitination is a critical epigenetic modification that regulates chromatin architecture and gene expression through the covalent attachment of ubiquitin molecules to specific lysine residues on histone H2A. As a highly coordinated regulatory mechanism, H2A ubiquitination not only contributes to gene silencing but also plays essential roles in DNA damage repair, maintenance of stem cell pluripotency, and embryonic development. Dysregulation of H2A ubiquitination has been closely linked t......

• • What Is Histone Ubiquitination Profiling?

  Histone ubiquitination profiling is a mass spectrometry-based analytical approach used to systematically identify, characterize, and quantify ubiquitination sites on histones and monitor their dynamic changes. As a critical epigenetic modification, histone ubiquitination plays essential roles in transcriptional regulation, chromatin remodeling, and DNA damage repair. Owing to the low abundance and structural complexity of ubiquitinated histone species, comprehensive characterization using conventional......

• • What Is Histone Succinylation?

  Histone modifications are a fundamental component of epigenetic regulation and have long been a central focus of gene expression research. Beyond the well-characterized modifications such as acetylation, methylation, and phosphorylation, histone succinylation has recently emerged as an important epigenetic modification, providing new insights into the intricate relationship between cellular metabolism and gene regulation. This article provides a comprehensive overview of histone succinylation, coverin......

• • How to Study Histone Succinylation by LC-MS/MS?

  Histone succinylation, a novel epigenetic modification, plays a critical role in regulating gene expression, mediating metabolic signaling, and elucidating disease mechanisms. Compared with traditional histone acetylation and methylation, succinylation introduces a larger structural moiety and carries a negative charge. Investigating this modification not only provides insights into chromatin accessibility but also reflects cellular metabolic states. Owing to its high sensitivity, specificity, and com......

• • How to Prepare Samples for Histone Succinylation Analysis?

  Histone succinylation, as a novel epigenetic modification, plays a crucial role in the regulation of gene expression, metabolic signaling pathways, and disease research. Because succinylated peptides are typically of low abundance and prone to degradation, their detection requires careful sample preparation. Optimizing the sample preparation workflow is critical for achieving accurate and sensitive LC-MS/MS or immunodetection results. Importance of Sample Preparation for Histone Succinylation 1. Pres......

• • How to Detect Histone Ubiquitination?

  Histone ubiquitination is a crucial post-translational modification involved in chromatin regulation. By covalently attaching ubiquitin molecules to specific residues on histones, it modulates gene expression, DNA damage repair, and chromatin dynamics. Due to the low abundance of ubiquitinated histones and their susceptibility to deubiquitinases, accurate detection presents a significant challenge. Researchers commonly employ a combination of Western blotting, immunoprecipitation, and mass spectrometr......

• • How to Analyze Histone Ubiquitination in Cancer Samples?

  Histone ubiquitination is a critical epigenetic modification that regulates chromatin architecture and consequently influences gene expression, DNA damage repair, and tumor initiation and progression. In cancer research, aberrant histone ubiquitination has been closely associated with tumor progression, therapeutic resistance, and alterations in the tumor immune microenvironment. Therefore, accurate characterization of histone ubiquitination is of considerable importance for identifying novel therapeu......