Resources

Proteomics Databases



Metabolomics Databases

• • Use MaxQuant for Proteomics Data Identification and Quantification

  Steps for Identification and Quantification of Proteomics Data Using MaxQuant:1. Data Preparation（1）Collect raw mass spectrometry data files (.raw format).（2）Prepare a protein database (e.g., Uniprot). 2. Parameter Setting（1）Open the MaxQuant software and create a new project.（2）Import raw data files and the protein database.（3）Set search parameters (e.g., enzymatic digestion rules, modification types, mass error tolerance, etc.).

• • Microbial Proteomics

  Microbial proteomics is a scientific discipline focused on understanding the composition, structure, function, and interactions of proteins within microorganisms. Advances in genomics and proteomics technologies allow researchers to gain a more comprehensive understanding of microbial protein characteristics and functions. Key research areas in microbial proteomics include the following:

• • Spatial Proteomics in Plant Research

  Application of spatial proteomics in plant research mainly includes the following aspects:1. Cellular Localization: Examining protein distributions across various organelles or tissues to elucidate mechanisms of cellular function differentiation and signal transduction. 2. Growth and Development: Analyzing the dynamic changes in protein expression throughout plant growth and development processes to comprehend underlying regulatory mechanisms.

• • Introduction to Single-Cell Proteomics

  Single-cell proteomics refers to the comprehensive and precise analysis of the proteome within individual cells through mass spectrometry, aiming to reveal protein expression patterns under various physiological and pathological conditions. In living organisms, cellular functions are dynamic and are regulated by multiple factors. Even within the same tissue, protein expression patterns can differ significantly among cells. This cellular heterogeneity is a fundamental driver of many biological phenomen......

• • Proteomics Solutions

  Proteomics solutions encompass a range of comprehensive methods and technologies designed to study the proteome in order to gain a detailed understanding of the protein composition, structure, function, and interactions within biological organisms. The solutions provided by proteomics research include the following steps:

• • Definition of Label-Free Proteomics

  Label-free proteomics is a method for studying the proteome without the need for pre-labeling proteins with agents like fluorescent dyes or isotopic labels. Instead, proteins in the sample are analyzed and quantified directly using mass spectrometry techniques, leading to its alternative name, label-free mass spectrometry proteomics. In this approach, proteins from biological samples are initially extracted and can then be separated using various techniques such as gel electrophoresis or liquid......

• • Ultramicro Proteomics

  Ultrasensitive proteomics is an advanced protein analysis technique designed to detect and quantify very low concentrations of proteins in biological systems. The primary aim of this technology is to address the limitations of conventional proteomics methods, allowing for a more in-depth understanding of protein composition and function within organisms.

• • Protein Quantification Method

  Common methods for protein quantification include: Bradford Protein Assay: This method quantifies protein concentration by measuring the absorbance change when Coomassie Brilliant Blue G-250 dye binds to proteins. It is ideal for rapid protein detection. BCA Protein Assay: This assay relies on the reduction of copper ions by proteins, which subsequently react with the BCA reagent to form a purple complex. Protein quantification is achieved through absorbance measurement.

• • De Novo Sequencing Mass Spectrometry

  De novo sequencing mass spectrometry is a powerful technique for determining the amino acid sequence of proteins without relying on existing protein or genome databases. Instead, it directly derives sequence information from experimental mass spectrometry data. This method is especially valuable for analyzing newly discovered proteins, unknown variants, or proteins with complex modifications. By uncovering the relationship between protein structure and function, de novo sequencing mass spectrometry pl......

• • Host Cell Protein Detection

  Host cell protein detection is a critical analytical technique in the development and production of biopharmaceuticals. HCPs are non-target proteins secreted or released by host cells during the manufacturing process. These proteins, as impurities, may trigger immune responses, reduce drug efficacy, and compromise patient safety. During drug development, host cell protein detection plays a pivotal role in optimizing purification processes to ensure compliance with stringent regulatory standards. Since......