Nuclear localization and DNA binding of ecdysone receptor and ultraspiracle

The Ecdysone receptor (EcR) is distributed between cytoplasm and nucleus in CHO cells. Nuclear localization is increased by the ligand Muristerone A. The most important heterodimerization partner Ultraspiracle (Usp) is localized predominantly in the nucleus. We used the diethylentriamine nitric oxid...

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Veröffentlicht in:Archives of insect biochemistry and physiology 2007-07, Vol.65 (3), p.125-133
Hauptverfasser: Cronauer, M.V, Braun, S, Tremmel, C, Kroncke, K.D, Spindler-Barth, M
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container_end_page 133
container_issue 3
container_start_page 125
container_title Archives of insect biochemistry and physiology
container_volume 65
creator Cronauer, M.V
Braun, S
Tremmel, C
Kroncke, K.D
Spindler-Barth, M
description The Ecdysone receptor (EcR) is distributed between cytoplasm and nucleus in CHO cells. Nuclear localization is increased by the ligand Muristerone A. The most important heterodimerization partner Ultraspiracle (Usp) is localized predominantly in the nucleus. We used the diethylentriamine nitric oxide adduct DETA/NO, which releases NO and destroys the zinc-finger structure of nuclear receptors, to investigate whether nuclear EcR and Usp interact with DNA. If expressed separately, Usp and EcR in the absence of hormone do not interact with DNA. The hormone-induced increase in nuclear EcR is due to enhanced DNA binding. In the presence of Usp, EcR is shifted nearly quantitatively into the nucleus. Only a fraction (approximately 30%) of the heterodimer is sensitive to DETA/NO. Interaction of the heterodimer with DNA is mediated mainly by the C-domain of EcR. Deletion of the DNA-binding domain of Usp only slightly reduces nuclear localization of EcR/Usp, although the nuclear localization signal of Usp is not present anymore. The results indicate that EcR and Usp can enter the nucleus independently, but cotransport of both receptors mediated by dimerization via the ligand binding domains is possible even in the absence of hormone.
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Insect Biochem. Physiol</addtitle><description>The Ecdysone receptor (EcR) is distributed between cytoplasm and nucleus in CHO cells. Nuclear localization is increased by the ligand Muristerone A. The most important heterodimerization partner Ultraspiracle (Usp) is localized predominantly in the nucleus. We used the diethylentriamine nitric oxide adduct DETA/NO, which releases NO and destroys the zinc-finger structure of nuclear receptors, to investigate whether nuclear EcR and Usp interact with DNA. If expressed separately, Usp and EcR in the absence of hormone do not interact with DNA. The hormone-induced increase in nuclear EcR is due to enhanced DNA binding. In the presence of Usp, EcR is shifted nearly quantitatively into the nucleus. Only a fraction (approximately 30%) of the heterodimer is sensitive to DETA/NO. Interaction of the heterodimer with DNA is mediated mainly by the C-domain of EcR. 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Braun, S ; Tremmel, C ; Kroncke, K.D ; Spindler-Barth, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4204-3e09769953a3ce233312f48c81312c4c3e81def2abd48ff590aee6d8053c41923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>active transport</topic><topic>Active Transport, Cell Nucleus</topic><topic>Animals</topic><topic>binding properties</topic><topic>cell nucleus</topic><topic>Cell Nucleus - metabolism</topic><topic>CHO Cells</topic><topic>Cricetinae</topic><topic>Cricetulus</topic><topic>dimerization</topic><topic>DNA - metabolism</topic><topic>DNA-binding domains</topic><topic>DNA-binding proteins</topic><topic>DNA-Binding Proteins - metabolism</topic><topic>Drosophila melanogaster</topic><topic>Drosophila Proteins</topic><topic>ecdysone</topic><topic>ecdysteroids</topic><topic>heterodimers</topic><topic>hormonal regulation</topic><topic>insect</topic><topic>intracellular localization</topic><topic>molting hormone</topic><topic>muristerone A</topic><topic>nitric oxide</topic><topic>nuclear receptors</topic><topic>Protein Binding</topic><topic>protein conformation</topic><topic>Protein Structure, Tertiary</topic><topic>receptors</topic><topic>Receptors, Steroid - metabolism</topic><topic>Transcription Factors - metabolism</topic><topic>zinc finger motif</topic><topic>Zn-finger</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cronauer, M.V</creatorcontrib><creatorcontrib>Braun, S</creatorcontrib><creatorcontrib>Tremmel, C</creatorcontrib><creatorcontrib>Kroncke, K.D</creatorcontrib><creatorcontrib>Spindler-Barth, M</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Entomology Abstracts (Full archive)</collection><collection>MEDLINE - Academic</collection><jtitle>Archives of insect biochemistry and physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cronauer, M.V</au><au>Braun, S</au><au>Tremmel, C</au><au>Kroncke, K.D</au><au>Spindler-Barth, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nuclear localization and DNA binding of ecdysone receptor and ultraspiracle</atitle><jtitle>Archives of insect biochemistry and physiology</jtitle><addtitle>Arch. 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subjects active transport
Active Transport, Cell Nucleus
Animals
binding properties
cell nucleus
Cell Nucleus - metabolism
CHO Cells
Cricetinae
Cricetulus
dimerization
DNA - metabolism
DNA-binding domains
DNA-binding proteins
DNA-Binding Proteins - metabolism
Drosophila melanogaster
Drosophila Proteins
ecdysone
ecdysteroids
heterodimers
hormonal regulation
insect
intracellular localization
molting hormone
muristerone A
nitric oxide
nuclear receptors
Protein Binding
protein conformation
Protein Structure, Tertiary
receptors
Receptors, Steroid - metabolism
Transcription Factors - metabolism
zinc finger motif
Zn-finger
title Nuclear localization and DNA binding of ecdysone receptor and ultraspiracle
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