Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/194208
Differential Expression of Two Copies of the irmA Gene in the Enteroaggregative E. coli Strain 042
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Gene duplications significantly impact the gene repertoires of both eukaryotic and prokaryotic microorganisms. The genomes of pathogenic Escherichia coli strains share a group of duplicated genes whose function is mostly unknown. The irmA gene is one of the duplicates encoded in several pathogenic E. coli strains. The function of its gene product was investigated in the uropathogenic E. coli strain CFT073, which contains a single functional copy. The IrmA protein structure mimics that of human interleukin receptors and likely plays a role during infection. The enteroaggregative E. coli strain 042 contains two functional copies of the irmA gene. In the present work, we investigated their biological roles. The irmA_4509 allele is expressed under several growth conditions. Its expression is modulated by the global regulators OxyR and Hha, with optimal expression at 37°C and under nutritional stress conditions. Expression of the irmA_2244 allele can only be detected when the irmA_4509 allele is knocked out. Differences in the promoter regions of both alleles account for their differential expression. Our results show that under several environmental conditions, the expression of the IrmA protein in strain 042 is dictated by the irmA_4509 allele. The irmA_2244 allele appears to play a backup role to ensure IrmA expression when the irmA_4509 allele loses its function.
Matèries
Matèries (anglès)
Citació
Citació
BERNABEU LORENZO, Manuel, AZNAR VICENTE, Sonia, PRIETO DURÁN, Alejandro, HÜTTENER QUEIROZ, Mário, JUÁREZ GIMÉNEZ, Antonio. Differential Expression of Two Copies of the irmA Gene in the Enteroaggregative E. coli Strain 042. _Microbiology Spectrum_. 2022. Vol. 10, núm. 4, pàgs. e0045422. [consulta: 21 de gener de 2026]. ISSN: 2165-0497. [Disponible a: https://hdl.handle.net/2445/194208]