Related Experiment Video
Updated: Jun 23, 2026
08:03
A Tandem Liquid Chromatography–Mass Spectrometry-based Approach for Metabolite Analysis of Staphylococcus aureus
Published on: March 28, 2017
[Analysis of protein interaction network and function of Staphylococcus aureus]
Qi Liu1, Chunlei Jiang, Zhengchao Xu
1College of Life Science, Sichuan University, Sichuan Public Experiment Platform of Bioinformatics and Metabolic Engineering, Chengdu 610064, China. liuqi_1984@yahoo.com.cn
Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
|April 25, 2009
Summary
This study constructed a protein interaction network for Staphylococcus aureus, revealing key proteins and pathways. This network analysis offers insights into the bacteria
Area of Science:
- Microbiology
- Bioinformatics
- Systems Biology
Context:
- Staphylococcus aureus is a difficult-to-treat Gram-positive pathogen causing various infections, particularly in healthcare settings.
- Previous research often focused on single genes or proteins, limiting a comprehensive understanding.
- A whole-genome approach is crucial for studying this organism's complex biology.
Purpose:
- To construct and analyze the protein interaction network (PIN) of Staphylococcus aureus.
- To identify critical proteins and functional modules within the S. aureus interactome.
- To leverage network properties for understanding pathogenicity and drug discovery.
Summary:
- Utilized five bioinformatics methods (phylogenetic profile, gene neighbor, operon, gene fusion, interolog) to predict the S. aureus PIN.
- Constructed the network and analyzed its functional properties, revealing a scale-free topology.
- Identified key proteins (e.g., SA0939, SA0868, rpID) and important local networks involved in cell wall synthesis and signal transduction.
Impact:
- The study provides a systems-level view of S. aureus protein interactions.
- Identified crucial proteins and pathways that can serve as novel therapeutic targets.
- Facilitates a deeper understanding of the pathogenic mechanisms of Staphylococcus aureus.
Related Concept Videos
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
01:29Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
01:25Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
01:25Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...