Advertisement

Topics

An unconventional RNA-based thermosensor within the 5' UTR of Staphylococcus aureus cidA.

08:00 EDT 1st April 2019 | BioPortfolio

Summary of "An unconventional RNA-based thermosensor within the 5' UTR of Staphylococcus aureus cidA."

Staphylococcus aureus is a Gram-positive bacterial pathogen of global concern and a leading cause of bacterial infections worldwide. Asymptomatic carriage of S. aureus on the skin and in the anterior nares is common and recognized as a predisposing factor to invasive infection. Transition of S. aureus from the carriage state to that of invasive infection is often accompanied by a temperature upshift from approximately 33°C to 37°C. Such a temperature shift is known in other pathogens to influence gene expression, often resulting in increased production of factors that promote survival or virulence within the host. One mechanism by which bacteria modulate gene expression in response to temperature is by the regulatory activity of RNA-based thermosensors, cis-acting riboregulators that control translation efficiency. This study was designed to identify and characterize RNA-based thermosensors in S. aureus. Initially predicted by in silico analyses of the S. aureus USA300 genome, reporter-based gene expression analyses and site-specific mutagenesis were performed to demonstrate the presence of a functional thermosensor within the 5' UTR of cidA, a gene implicated in biofilm formation and survival of the pathogen. The nucleic sequence composing the identified thermosensor are sufficient to confer temperature-dependent post-transcriptional regulation, and activity is predictably altered by the introduction of site-specific mutations designed to stabilize or destabilize the structure within the identified thermosensor. The identified regulator is functional in both the native bacterial host S. aureus and in the distally related species Escherichia coli, suggesting that its regulatory activity is independent of host-specific factors. Interestingly, unlike the majority of bacterial RNA-based thermosensors characterized to date, the cidA thermosensor facilitates increased target gene expression at lower temperatures. In addition to the characterization of the first RNA-based thermosensor in the significant pathogen S. aureus, it highlights the diversity of function within this important class of ribo-regulators.

Affiliation

Journal Details

This article was published in the following journal.

Name: PloS one
ISSN: 1932-6203
Pages: e0214521

Links

DeepDyve research library

PubMed Articles [13460 Associated PubMed Articles listed on BioPortfolio]

Staphylococcus aureus Bacteraemia - an Interdisciplinary Challenge.

Staphylococcus aureus is the second-most-common pathogen among bloodstream infections. Due to a high hospital mortality rate (15 - 40%), frequent complications and recurrences the clinical managem...

Antimicrobial, anti-adhesive and anti-biofilm potential of biosurfactants isolated from Pediococcus acidilactici and Lactobacillus plantarum against Staphylococcus aureus CMCC26003.

Biosurfactants (BS) are amphipathic compounds produced by diverse groups of microorganisms exhibiting various biological activities. The current study aimed to assess antimicrobial, anti-adhesive and ...

A decade of antimicrobial resistance in Staphylococcus aureus: A single center experience.

The emergence of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) resulted in the recommended use of clindamycin and trimethoprim-sulfamethoxazole (TMP-SMX) for suspected S. ...

Staphylococcus aureus from atopic dermatitis skin accumulates in the lysosomes of keratinocytes with induction of IL-1α secretion via TLR9.

Staphylococcus aureus (S. aureus) is frequently detected in the skin of patients with atopic dermatitis (AD), and involved in the flare of AD. There are some evidence specific strains of S. aureus aff...

Methicillin-resistant Staphylococcus aureus eradication in cystic fibrosis patients: A randomized multicenter study.

Few studies, based on a limited number of patients using non-uniform therapeutic protocols, have analyzed Methicillin-resistant Staphylococcus aureus (MRSA) eradication.

Clinical Trials [2892 Associated Clinical Trials listed on BioPortfolio]

A Study of a Recombinant Staphylococcus Aureus Vaccine (Escherichia Coli) in Healthy Adults

This is an open-label, dose-escalation pilot study with a total of 30 participants with 10 per dosage group. The aim of the pilot study is to explore the preliminary safety of an experimen...

Study of Staphylococcus Aureus Colonization of the Posterior Nasal Cavity in Patients Undergoing Otorhinolaryngologic Surgery

Staphylococcus aureus nasal carriage is a major risk factor of infection with this bacterium. To our best knowledge, Staphylococcus aureus colonization of the posterior nasal cavity is sti...

Staphylokinase and ABO Group Phenotype: New Players in Staphylococcus Aureus Implant-associated Infections Development

The purpose of this study is to identify bacterial and/or clinical features involved in the pathogenesis of Staphylococcus aureus implant-associated infections (IAI). Materials & methods: ...

Evaluation of a Diagnostic Device for Detection of Nasal Staphylococcus Aureus

To establish the clinical test performance characteristics of sensitivity, specificity and predictive values for direct detection of nasal Staphylococcus aureus colonization against clinic...

A Clinical Trial to Evaluate a Recombinant Staphylococcus Aureus Vaccine (Escherichia Coli) in Healthy Adults

Before this study, there will be an open-label, dose-escalation pilot study with a total of 30 participants with 10 per dosage group. The aim of the pilot study is to explore the prelimina...

Medical and Biotech [MESH] Definitions

A strain of Staphylococcus aureus that is non-susceptible to the action of METHICILLIN. The mechanism of resistance usually involves modification of normal or the presence of acquired PENICILLIN BINDING PROTEINS.

A 25-kDa peptidase produced by Staphylococcus simulans which cleaves a glycine-glcyine bond unique to an inter-peptide cross-bridge of the STAPHYLOCOCCUS AUREUS cell wall. EC 3.4.24.75.

Pneumonia caused by infections with bacteria of the genus STAPHYLOCOCCUS, usually with STAPHYLOCOCCUS AUREUS.

A species of STAPHYLOCOCCUS similar to STAPHYLOCOCCUS HAEMOLYTICUS, but containing different esterases. The subspecies Staphylococcus hominis novobiosepticus is highly virulent and novobiocin resistant.

Potentially pathogenic bacteria found in nasal membranes, skin, hair follicles, and perineum of warm-blooded animals. They may cause a wide range of infections and intoxications.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topics

Dermatology
Acne Dermatology Eczema Psoriasis Wound Care Dermatology is the medical specialty concerned with the diagnosis and treatment of skin disorders (Oxford Medical Dictionary). As well as studying how the skin works, dermatology covers...

Infectious-diseases
Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...

Gene Expression
The process of gene expression is used by eukaryotes, prokaryotes, and viruses to generate the macromolecular machinery for life. Steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-tran...


Searches Linking to this Article