Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro.
Previous studies have established that the expression of Salmonella enterica pathogenicity island 1 (SPI1), which is essential for epithelial invasion, is mainly regulated by the HilD protein. The ferric uptake regulator, Fur, in turn modulates the expression of the S. enterica hilD gene, albeit thr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2011-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3089636?pdf=render |
| _version_ | 1818398745668091904 |
|---|---|
| author | Laura Teixidó Begoña Carrasco Juan C Alonso Jordi Barbé Susana Campoy |
| author_facet | Laura Teixidó Begoña Carrasco Juan C Alonso Jordi Barbé Susana Campoy |
| author_sort | Laura Teixidó |
| collection | DOAJ |
| description | Previous studies have established that the expression of Salmonella enterica pathogenicity island 1 (SPI1), which is essential for epithelial invasion, is mainly regulated by the HilD protein. The ferric uptake regulator, Fur, in turn modulates the expression of the S. enterica hilD gene, albeit through an unknown mechanism. Here we report that S. enterica Fur, in its metal-bound form, specifically binds to an AT-rich region (BoxA), located upstream of the hilD promoter (P(hilD)), at position -191 to -163 relative to the hilD transcription start site. Furthermore, in a P(hilD) variant with mutations in BoxA, P(hilD*), Fur·Mn(2+) binding is impaired. In vivo experiments using S. enterica strains carrying wild-type P(hilD) or the mutant variant P(hilD*) showed that Fur activates hilD expression, while in vitro experiments revealed that the Fur·Mn(2+) protein is sufficient to increase hilD transcription. Together, these results present the first evidence that Fur·Mn(2+), by binding to the upstream BoxA sequence, directly stimulates the expression of hilD in S. enterica. |
| first_indexed | 2024-12-14T07:09:40Z |
| format | Article |
| id | doaj.art-955d390fb2334643a365d7dd77136a72 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-14T07:09:40Z |
| publishDate | 2011-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-955d390fb2334643a365d7dd77136a722022-12-21T23:11:56ZengPublic Library of Science (PLoS)PLoS ONE1932-62032011-01-0165e1971110.1371/journal.pone.0019711Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro.Laura TeixidóBegoña CarrascoJuan C AlonsoJordi BarbéSusana CampoyPrevious studies have established that the expression of Salmonella enterica pathogenicity island 1 (SPI1), which is essential for epithelial invasion, is mainly regulated by the HilD protein. The ferric uptake regulator, Fur, in turn modulates the expression of the S. enterica hilD gene, albeit through an unknown mechanism. Here we report that S. enterica Fur, in its metal-bound form, specifically binds to an AT-rich region (BoxA), located upstream of the hilD promoter (P(hilD)), at position -191 to -163 relative to the hilD transcription start site. Furthermore, in a P(hilD) variant with mutations in BoxA, P(hilD*), Fur·Mn(2+) binding is impaired. In vivo experiments using S. enterica strains carrying wild-type P(hilD) or the mutant variant P(hilD*) showed that Fur activates hilD expression, while in vitro experiments revealed that the Fur·Mn(2+) protein is sufficient to increase hilD transcription. Together, these results present the first evidence that Fur·Mn(2+), by binding to the upstream BoxA sequence, directly stimulates the expression of hilD in S. enterica.http://europepmc.org/articles/PMC3089636?pdf=render |
| spellingShingle | Laura Teixidó Begoña Carrasco Juan C Alonso Jordi Barbé Susana Campoy Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. PLoS ONE |
| title | Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. |
| title_full | Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. |
| title_fullStr | Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. |
| title_full_unstemmed | Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. |
| title_short | Fur activates the expression of Salmonella enterica pathogenicity island 1 by directly interacting with the hilD operator in vivo and in vitro. |
| title_sort | fur activates the expression of salmonella enterica pathogenicity island 1 by directly interacting with the hild operator in vivo and in vitro |
| url | http://europepmc.org/articles/PMC3089636?pdf=render |
| work_keys_str_mv | AT laurateixido furactivatestheexpressionofsalmonellaentericapathogenicityisland1bydirectlyinteractingwiththehildoperatorinvivoandinvitro AT begonacarrasco furactivatestheexpressionofsalmonellaentericapathogenicityisland1bydirectlyinteractingwiththehildoperatorinvivoandinvitro AT juancalonso furactivatestheexpressionofsalmonellaentericapathogenicityisland1bydirectlyinteractingwiththehildoperatorinvivoandinvitro AT jordibarbe furactivatestheexpressionofsalmonellaentericapathogenicityisland1bydirectlyinteractingwiththehildoperatorinvivoandinvitro AT susanacampoy furactivatestheexpressionofsalmonellaentericapathogenicityisland1bydirectlyinteractingwiththehildoperatorinvivoandinvitro |