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Analysis of the enhancer-blocking function of the TBS element from Petunia hybrida in transgenic Arabidopsis thaliana and Nicotiana tabacum

Transcriptional enhancers possess the ability to override the tissue-specificity and efficiency of nearby promoters, which is of concern when generating transgenic constructs bearing multiple cassettes. One means of preventing these inappropriate interactions is through the use of enhancer-blocking... Full description

Journal Title: Plant Cell Reports 2011, Vol.30(11), pp.2013-2025
Main Author: Singer, Stacy
Other Authors: Hily, Jean-Michel , Cox, Kerik
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Springer Science & Business Media B.V.
ID: ISSN: 0721-7714 ; E-ISSN: 1432-203X ; DOI: 10.1007/s00299-011-1109-8
Link: http://dx.doi.org/10.1007/s00299-011-1109-8
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recordid: springer_jour10.1007/s00299-011-1109-8
title: Analysis of the enhancer-blocking function of the TBS element from Petunia hybrida in transgenic Arabidopsis thaliana and Nicotiana tabacum
format: Article
creator:
  • Singer, Stacy
  • Hily, Jean-Michel
  • Cox, Kerik
subjects:
  • TBS element
  • Enhancer-blocking insulator
  • CaMV promoter/enhancer
  • Arabidopsis thaliana
  • Nicotiana tabacum
  • Enhancer–promoter interference
ispartof: Plant Cell Reports, 2011, Vol.30(11), pp.2013-2025
description: Transcriptional enhancers possess the ability to override the tissue-specificity and efficiency of nearby promoters, which is of concern when generating transgenic constructs bearing multiple cassettes. One means of preventing these inappropriate interactions is through the use of enhancer-blocking insulators. The 2-kb transformation booster sequence ( TBS ) from Petunia hybrida has been shown previously to exhibit this function when inserted between an enhancer and promoter in transgenic Arabidopsis thaliana . In this study, we attempted to further characterize the ability of this fragment to impede enhancer–promoter interference through an analysis of transgenic Arabidopsis and Nicotiana tabacum lines bearing various permutations of the TBS element between the cauliflower mosaic virus (CaMV) 35S enhancer and an assortment of tissue-specific promoters fused to the β - glucuronidase ( GUS ) reporter gene. The full-length TBS fragment was found to function in both orientations, although to a significantly lesser degree in the reverse orientation, and was operational in both plant species tested. While multiple deletion fragments were found to exhibit activity, it appeared that several regions of the TBS were required for maximal enhancer-blocking function. Furthermore, we found that this element exhibited promoter-like activity, which has implications in terms of possible mechanisms behind its ability to impede enhancer–promoter communication in plants.
language: eng
source: Springer Science & Business Media B.V.
identifier: ISSN: 0721-7714 ; E-ISSN: 1432-203X ; DOI: 10.1007/s00299-011-1109-8
fulltext: fulltext
issn:
  • 1432-203X
  • 1432203X
  • 0721-7714
  • 07217714
url: Link


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titleAnalysis of the enhancer-blocking function of the TBS element from Petunia hybrida in transgenic Arabidopsis thaliana and Nicotiana tabacum
creatorSinger, Stacy ; Hily, Jean-Michel ; Cox, Kerik
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subjectTBS element ; Enhancer-blocking insulator ; CaMV promoter/enhancer ; Arabidopsis thaliana ; Nicotiana tabacum ; Enhancer–promoter interference
descriptionTranscriptional enhancers possess the ability to override the tissue-specificity and efficiency of nearby promoters, which is of concern when generating transgenic constructs bearing multiple cassettes. One means of preventing these inappropriate interactions is through the use of enhancer-blocking insulators. The 2-kb transformation booster sequence ( TBS ) from Petunia hybrida has been shown previously to exhibit this function when inserted between an enhancer and promoter in transgenic Arabidopsis thaliana . In this study, we attempted to further characterize the ability of this fragment to impede enhancer–promoter interference through an analysis of transgenic Arabidopsis and Nicotiana tabacum lines bearing various permutations of the TBS element between the cauliflower mosaic virus (CaMV) 35S enhancer and an assortment of tissue-specific promoters fused to the β - glucuronidase ( GUS ) reporter gene. The full-length TBS fragment was found to function in both orientations, although to a significantly lesser degree in the reverse orientation, and was operational in both plant species tested. While multiple deletion fragments were found to exhibit activity, it appeared that several regions of the TBS were required for maximal enhancer-blocking function. Furthermore, we found that this element exhibited promoter-like activity, which has implications in terms of possible mechanisms behind its ability to impede enhancer–promoter communication in plants.
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descriptionTranscriptional enhancers possess the ability to override the tissue-specificity and efficiency of nearby promoters, which is of concern when generating transgenic constructs bearing multiple cassettes. One means of preventing these inappropriate interactions is through the use of enhancer-blocking insulators. The 2-kb transformation booster sequence ( TBS ) from Petunia hybrida has been shown previously to exhibit this function when inserted between an enhancer and promoter in transgenic Arabidopsis thaliana . In this study, we attempted to further characterize the ability of this fragment to impede enhancer–promoter interference through an analysis of transgenic Arabidopsis and Nicotiana tabacum lines bearing various permutations of the TBS element between the cauliflower mosaic virus (CaMV) 35S enhancer and an assortment of tissue-specific promoters fused to the β - glucuronidase ( GUS ) reporter gene. The full-length TBS fragment was found to function in both orientations, although to a significantly lesser degree in the reverse orientation, and was operational in both plant species tested. While multiple deletion fragments were found to exhibit activity, it appeared that several regions of the TBS were required for maximal enhancer-blocking function. Furthermore, we found that this element exhibited promoter-like activity, which has implications in terms of possible mechanisms behind its ability to impede enhancer–promoter communication in plants.
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abstractTranscriptional enhancers possess the ability to override the tissue-specificity and efficiency of nearby promoters, which is of concern when generating transgenic constructs bearing multiple cassettes. One means of preventing these inappropriate interactions is through the use of enhancer-blocking insulators. The 2-kb transformation booster sequence ( TBS ) from Petunia hybrida has been shown previously to exhibit this function when inserted between an enhancer and promoter in transgenic Arabidopsis thaliana . In this study, we attempted to further characterize the ability of this fragment to impede enhancer–promoter interference through an analysis of transgenic Arabidopsis and Nicotiana tabacum lines bearing various permutations of the TBS element between the cauliflower mosaic virus (CaMV) 35S enhancer and an assortment of tissue-specific promoters fused to the β - glucuronidase ( GUS ) reporter gene. The full-length TBS fragment was found to function in both orientations, although to a significantly lesser degree in the reverse orientation, and was operational in both plant species tested. While multiple deletion fragments were found to exhibit activity, it appeared that several regions of the TBS were required for maximal enhancer-blocking function. Furthermore, we found that this element exhibited promoter-like activity, which has implications in terms of possible mechanisms behind its ability to impede enhancer–promoter communication in plants.
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doi10.1007/s00299-011-1109-8
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