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The Small RNA NcS25 Regulates Biological Amine-Transporting Outer Membrane Porin BCAL3473 in Burkholderia cenocepacia.
- Source :
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MSphere [mSphere] 2023 Apr 20; Vol. 8 (2), pp. e0008323. Date of Electronic Publication: 2023 Mar 27. - Publication Year :
- 2023
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Abstract
- Regulation of porin expression in bacteria is complex and often involves small-RNA regulators. Several small-RNA regulators have been described for Burkholderia cenocepacia, and this study aimed to characterize the biological role of the conserved small RNA NcS25 and its cognate target, outer membrane protein BCAL3473. The B. cenocepacia genome carries a large number of genes encoding porins with yet-uncharacterized functions. Expression of the porin BCAL3473 is strongly repressed by NcS25 and activated by other factors, such as a LysR-type regulator and nitrogen-depleted growth conditions. The porin is involved in transport of arginine, tyrosine, tyramine, and putrescine across the outer membrane. Porin BCAL3473, with NcS25 as a major regulator, plays an important role in the nitrogen metabolism of B. cenocepacia. IMPORTANCE Burkholderia cenocepacia is a Gram-negative bacterium which causes infections in immunocompromised individuals and in people with cystic fibrosis. A low outer membrane permeability is one of the factors giving it a high level of innate resistance to antibiotics. Porins provide selective permeability for nutrients, and antibiotics can also traverse the outer membrane by this means. Knowing the properties and specificities of porin channels is therefore important for understanding resistance mechanisms and for developing new antibiotics and could help in overcoming permeability issues in antibiotic treatment.
- Subjects :
- Biofilms growth & development
Gene Deletion
Point Mutation
Base Pairing
Biological Transport genetics
Burkholderia cepacia complex genetics
Burkholderia cepacia complex metabolism
Porins chemistry
Porins genetics
Porins metabolism
RNA, Small Untranslated chemistry
RNA, Small Untranslated genetics
RNA, Small Untranslated metabolism
RNA, Bacterial chemistry
RNA, Bacterial genetics
RNA, Bacterial metabolism
Gene Expression Regulation, Bacterial
Bacterial Outer Membrane Proteins genetics
Bacterial Outer Membrane Proteins metabolism
Biogenic Amines metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 2379-5042
- Volume :
- 8
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- MSphere
- Publication Type :
- Academic Journal
- Accession number :
- 36971554
- Full Text :
- https://doi.org/10.1128/msphere.00083-23