Bacterial protein networks: properties and functions.
Athanasios Typas1, Victor Sourjik2
1European Molecular Biology Laboratory (EMBL), Genome Biology Unit, Meyerhofstr 1, 69117 Heidelberg, Germany.
Nature Reviews. Microbiology
|August 11, 2015
Summary
Bacterial protein networks organize cellular functions. This review explores their structure, properties, and mapping tools, using chemotaxis and cell cycle networks as examples.
Area of Science:
- Microbiology
- Systems Biology
- Molecular Biology
Background:
- Cellular functions rely on protein complexes and networks.
- Understanding these complex biological networks is a major scientific challenge.
- Microorganisms are key models for studying protein networks.
Purpose of the Study:
- To review current knowledge of bacterial protein networks.
- To describe general properties and mapping tools for these networks.
- To illustrate network architecture's role in function using specific examples.
Main Methods:
- Systematic mapping and characterization of protein networks.
- Analysis of network architecture and properties.
- Case studies of the chemotaxis and cell cycle networks in Escherichia coli.
Main Results:
- Bacterial protein networks exhibit specific organizational principles.
- Various tools exist for mapping and characterizing these networks.
- Network architecture directly influences cellular functions like chemotaxis and cell division.
Conclusions:
- Bacterial protein networks are crucial for cellular function.
- Understanding network structure provides insights into biological processes.
- Escherichia coli networks serve as valuable models for network biology.
Related Concept Videos
Protein Networks
4.7K
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,...
4.7K
Protein Networks
2.9K
2.9K
Cytoskeletal Proteins in Bacteria
4.5K
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
4.5K
Bacterial Translocation and Protein Secretion
1.0K
Bacterial protein secretion involves translocation systems to ensure proteins reach their designated locations, including the plasma membrane, periplasm, outer membrane, or the external environment. These translocation systems are vital for bacterial physiology, supporting processes like membrane assembly, enzymatic activity in the periplasm, and interactions with the external environment. The division of labor between Sec and Tat pathways ensures efficiency in handling proteins with diverse...
1.0K
Coordination of Gene Expression Processes in Bacteria
999
The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...
999
Bacterial Protein Maturation
710
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
710


