ArticleBMC microbiology2015
Identification of genes essential for pellicle formation in Acinetobacter baumannii.
Article in BMC microbiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
53 citing papers in PubMed, 75 citations in OpenAlex.
- AnResearch square · 2026Article
- Repurposing trifluridine as an anti-Staphylococcus aureus agent targeting virulence factor staphyloxanthin and attachment genes.Scientific reports · 2026Article
- Bacteriophages hijack 2',3'-cNMPs to enhance transposase-mediated phage DNA integration inScience advances · 2026Article
- Network-level divergence in cyclic di-GMP signalling drives ecological versatility in Acinetobacter baumannii.NPJ biofilms and microbiomes · 2026Article
- Planktonic Aggregation Enhances Antibiotic Tolerance in Non-MDRMicroorganisms · 2025Article
- Gene dependence during mammalianMicrobial genomics · 2025Article
- Virulence between ESBL and non-ESBL producing isolates of Acinetobacter baumanii causing diabetic foot infections.Bioinformation · 2025Article
- Signaling inComputational and structural biotechnology journal · 2025Review
- Exploring fluoroquinolone resistance mechanisms and the effects of carbonyl cyanide 3-chlorophenylhydrazone (CCCP) inFrontiers in medicine · 2025Article
- Commercial Day-Old Chicks in Nigeria Are Potential Reservoirs of Colistin- and Tigecycline-Resistant Potentially PathogenicAntibiotics (Basel, Switzerland) · 2024Article
- Cyclic AMP is a global virulence regulator governing inter and intrabacterial signalling in Acinetobacter baumannii.PLoS pathogens · 2024Article
- Comparative Transcriptomic Profiling of Pellicle and Planktonic Cells from Carbapenem-ResistantAntibiotics (Basel, Switzerland) · 2023Article
- Comparative Genomic Analysis of Biofilm-Forming PolarMicroorganisms · 2023Article
- Feature architecture aware phylogenetic profiling indicates a functional diversification of type IVa pili in the nosocomial pathogen Acinetobacter baumannii.PLoS genetics · 2023Article
- Article
- Porous Pellicle Formation of a Filamentous Bacterium,Applied and environmental microbiology · 2022Article
- Vaccination with a combination of planktonic and biofilm virulence factors confers protection against carbapenem-resistant Acinetobacter baumannii strains.Scientific reports · 2022Article
- Complementary Regulation of BfmRS Two-Component and AbaIR Quorum Sensing Systems to Express Virulence-Associated Genes inInternational journal of molecular sciences · 2022Article
- Evolutionarily stable gene clusters shed light on the common grounds of pathogenicity in the Acinetobacter calcoaceticus-baumannii complex.PLoS genetics · 2022Article
- The StkSR Two-Component System Influences Colistin Resistance inMicroorganisms · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAcinetobacter baumannii is an opportunistic pathogen, which has the ability to persist in the clinical environment, causing acute and chronic infections. A possible mechanism contributing to survival of A. baumannii is its ability to form a biofilm-like structure at the air/liquid interface, known as a pellicle. This study aimed to identify and characterise the molecular mechanisms required for pellicle formation in A. baumannii and to assess a broad range of clinical A. baumannii strains for their ability to form these multicellular structures.
resultsRandom transposon mutagenesis was undertaken on a previously identified hyper-motile variant of A. baumannii ATCC 17978 designated 17978hm. In total three genes critical for pellicle formation were identified; cpdA, a phosphodiesterase required for degradation of cyclic adenosine monophosphate (cAMP), and A1S_0112 and A1S_0115 which are involved in the production of a secondary metabolite. While motility of the A1S_0112::Tn and A1S_0115::Tn mutant strains was abolished, the cpdA::Tn mutant strain displayed a minor alteration in its motility pattern. Determination of cAMP levels in the cpdA::Tn strain revealed a ~24-fold increase in cellular cAMP, confirming the role CpdA plays in catabolising this secondary messenger molecule. Interestingly, transcriptional analysis of the cpdA::Tn strain showed significant down-regulation of the operon harboring the A1S_0112 and A1S_0115 genes, revealing a link between these three genes and pellicle formation. Examination of our collection of 54 clinical A. baumannii strains revealed that eight formed a measurable pellicle; all of these strains were motile.
conclusionsThis study shows that pellicle formation is a rare trait in A. baumannii and that a limited number of genes are essential for the expression of this phenotype. Additionally, an association between pellicle formation and motility was identified. The level of the signalling molecule cAMP was found to be controlled, in part, by the cpdA gene product, in addition to playing a critical role in pellicle formation, cellular hydrophobicity and motility. Furthermore, cAMP was identified as a novel regulator of the operon A1S_0112-0118.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.