The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes
The ISCR1 (Insertion sequence Common Region) element is the most widespread member of the ISCR family, and is frequently present within γ-proteobacteria that occur in clinical settings. ISCR1 is always associated with the 3′Conserved Segment (3′CS) of class 1 integrons. ISCR1 contains outward-orient...
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doaj-e2e797a0a48949f9a1dd3d65e9baae762020-11-24T22:23:20ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2018-10-01910.3389/fmicb.2018.02579413224The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance GenesClaire LallementCécile PasternakMarie-Cécile PloyThomas JovéThe ISCR1 (Insertion sequence Common Region) element is the most widespread member of the ISCR family, and is frequently present within γ-proteobacteria that occur in clinical settings. ISCR1 is always associated with the 3′Conserved Segment (3′CS) of class 1 integrons. ISCR1 contains outward-oriented promoters POUT, that may contribute to the expression of downstream genes. In ISCR1, there are two POUT promoters named PCR1-1 and PCR1-2. We performed an in silico analysis of all publically available ISCR1 sequences and identified numerous downstream genes that mainly encode antibiotic resistance genes and that are oriented in the same direction as the POUT promoters. Here, we showed that both PCR1-1 and PCR1-2 significantly increase the expression of the downstream genes blaCTX-M-9 and dfrA19. Our data highlight the role of ISCR1 in the expression of antibiotic resistance genes, which may explain why ISCR1 is so frequent in clinical settings.https://www.frontiersin.org/article/10.3389/fmicb.2018.02579/fullantibiotic resistancepromotersISCR1expressioninsertion sequence element |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Claire Lallement Cécile Pasternak Marie-Cécile Ploy Thomas Jové |
spellingShingle |
Claire Lallement Cécile Pasternak Marie-Cécile Ploy Thomas Jové The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes Frontiers in Microbiology antibiotic resistance promoters ISCR1 expression insertion sequence element |
author_facet |
Claire Lallement Cécile Pasternak Marie-Cécile Ploy Thomas Jové |
author_sort |
Claire Lallement |
title |
The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes |
title_short |
The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes |
title_full |
The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes |
title_fullStr |
The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes |
title_full_unstemmed |
The Role of ISCR1-Borne POUT Promoters in the Expression of Antibiotic Resistance Genes |
title_sort |
role of iscr1-borne pout promoters in the expression of antibiotic resistance genes |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2018-10-01 |
description |
The ISCR1 (Insertion sequence Common Region) element is the most widespread member of the ISCR family, and is frequently present within γ-proteobacteria that occur in clinical settings. ISCR1 is always associated with the 3′Conserved Segment (3′CS) of class 1 integrons. ISCR1 contains outward-oriented promoters POUT, that may contribute to the expression of downstream genes. In ISCR1, there are two POUT promoters named PCR1-1 and PCR1-2. We performed an in silico analysis of all publically available ISCR1 sequences and identified numerous downstream genes that mainly encode antibiotic resistance genes and that are oriented in the same direction as the POUT promoters. Here, we showed that both PCR1-1 and PCR1-2 significantly increase the expression of the downstream genes blaCTX-M-9 and dfrA19. Our data highlight the role of ISCR1 in the expression of antibiotic resistance genes, which may explain why ISCR1 is so frequent in clinical settings. |
topic |
antibiotic resistance promoters ISCR1 expression insertion sequence element |
url |
https://www.frontiersin.org/article/10.3389/fmicb.2018.02579/full |
work_keys_str_mv |
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