A comprehensive review on human disease-causing bacterial proteases and their impeding agents
Shobana Sundar1, Shanmughavel Piramanayagam2, Jeyakumar Natarajan3
1Department of Biotechnology, PSG College of Technology, Coimbatore, India.
Archives of Microbiology
|July 6, 2023
Summary
Bacterial proteases contribute to human diseases by degrading host defenses and aiding pathogen virulence. This review explores cysteine, metallo, and serine bacterial proteases as potential drug targets and their inhibitors.
Area of Science:
- Biochemistry
- Microbiology
- Pharmacology
Background:
- Proteases are enzymes catalyzing peptide bond hydrolysis, crucial in biological processes.
- Bacterial proteases significantly impact human diseases, including cancers and infections.
- Extracellular proteases degrade host defenses, while intracellular proteases enhance pathogen virulence.
Purpose of the Study:
- To comprehensively review human disease-causing bacterial proteases.
- To identify and discuss potential inhibitors for these bacterial proteases.
- To highlight bacterial proteases as viable drug targets.
Main Methods:
- Literature review of scientific studies on bacterial proteases.
- Categorization of proteases into families (cysteine, metallo, serine).
- Analysis of protease roles in pathogenesis and virulence.
Main Results:
- Bacterial proteases are implicated in a wide range of human ailments.
- Extracellular and intracellular bacterial proteases play distinct roles in disease.
- Numerous potential inhibitors have been identified for various bacterial proteases.
Conclusions:
- Bacterial proteases are critical virulence factors and drug targets.
- Targeting bacterial proteases offers a promising therapeutic strategy.
- Further research into bacterial protease inhibitors is warranted.
Related Concept Videos
The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
Gene Regulation in Microbial Communities: Quorum Sensing
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
Bacterial Toxins
Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
Determinants of Bacterial Pathogenicity and Virulence
Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
Clinical 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...


