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Sci. STKE, 26 October 2004
[DOI: 10.1126/stke.2562004pe51]

Dynamic Control of Nuclear Receptor Transcription
Animation: Nuclear Receptor and Transcriptional
Complex Cycles

Amy M. Fowler and Elaine T. Alarid*

Department of Physiology, University of Wisconsin-Madison, 1300 University Avenue, Madison, WI 53706, USA.

Animation. Nuclear receptors are intracellular transcriptional regulators that reside in either the cytoplasm or nucleus in the inactive state. Based on experiments following the dynamics of the glucocorticoid receptor and estrogen receptor (1, 2), this animation shows nuclear estrogen receptor (ER) and its interaction with a short two-nucleosome fragment of chromatin in the absence and presence of estrogen. Gene activation appears to involve cyclical assembly and disassembly of protein complexes on the promoter region of the gene to be expressed. The periodic associations of different combinations of multimolecular complexes on the DNA over time highlight the dynamics underlying transcriptional regulation.

In this animation, the events that occur on the DNA are represented by the ordered recruitment of protein components to a larger macromolecular complex. The names and abbreviations of the various proteins are listed in Table 1, and their sizes in the animation are depicted in proportion to their relative molecular weights. Classes of proteins, such as HATs and HMTs, are maintained in a single color, and switching among individual proteins that belong to the same class is shown by a change in size and shape. Chromatin remodeling is indicated by an alteration in how tightly the DNA is associated with the histones. Posttranslational modification of histones and phosphorylation of RNAPII are indicated by color changes.

Table 1. Proteins involved in the nuclear receptor-chromatin cycles. Not all proteins are shown individually in the animation. Bold entries indicate the general name given for either a multiprotein complex or a class of proteins.

Abbreviation Name
ER Estrogen Receptor
hSWI/SNF

hBRG1
INI1
hBRM1
ATP-dependent chromatin remodeling complex (shown as SWI/SNF in the animation)
Brahma-related gene 1 protein
Integrase interactor 1
Brahma protein
HAT
p300
GCN5
Tip60
pCAF
CBP
Histone acetyltransferase
p300
General control positive factor
Tat-interacting protein
p300/CBP associated factor
CREB binding protein
HMT
PRMT1
CARM1
Histone methyltransferase
Protein arginine methyltransferase
Cofactor associated arginine methyltransferase
CoA
SRC1
SRC3
Coactivator
Steroid receptor coactivator 1
Steroid receptor coactivator 3
TAFII
TAFII250
TAFII130
TATA binding protein (TBP)-associated factor
TBP-associated factor of 250 kD
TBP-associated factor of 130 kD
TBP
TATA box-binding protein
TFIIA Component of the basal transcription machinery included in RNA polymerase II holoenzyme
RNAPII RNA polymerase II
E3 ligase
E6AP
MDM2
E3 ubiquitin ligase (shown as E3 in the animation)
Oncoprotein E6-associated protein
Murine double minute 2
Mediator
Med7
TRAP220
(multiprotein complex)
Mediator subunit 7
Thyroid hormone receptor-associated protein of 220 kD
CDK7 Cyclin-dependent kinase 7
(subunit of TFIIH)
Elongator
Elp1
Elp3
(multiprotein complex)
Elongator protein 1
Elongator protein 3
APIS

SUG1
AAA ATPase proteins independent of 20S
(19S regulatory component of the proteasome)
Suppressor gene 1
HDAC
HDAC1
HDAC7
Histone deacetylase
Histone deacetylase 1
Histone deacetylase 7
HSP70 Heat shock protein of 70 kD
NuRD Nucleosome remodeling and histone deactylation (multiprotein complex, 15 subunits)

Two versions of the animation are available: A smaller size file, which is 2,203 kb and opens in a smaller window, or a larger version, which is 7,686 kb and opens in a larger window. Both animations show the same nuclear receptor cycle. Press the start button at the bottom of the QuickTime movie player to start the animation. Press the pause and play button to start and stop the action at any point.

[Access Small Animation] [Access Large Animation]

Technical Details

Format: Quicktime file (mov file)

Size: 2,203 kb (small version) or 7,686 kb (large version)

Requirements: This animation will play with Quicktime (http://www.apple.com/quicktime/download/).

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Corresponding author. E-mail, //alarid{at}physiology.wisc.edu

References

  1. R. Métivier, G. Penot, M. R. Hübner, G. Reid, H. Brand, M. Koš, F. Gannon, Estrogen receptor-a directs ordered, cyclical, and combinatorial recruitment of cofactors on a natural target promoter. Cell 115, 751-763 (2003).
  2. A. K. Nagaich, D. A. Walker, R. Wolford, G. L. Hager, Rapid periodic binding and displacement of the glucocorticoid receptor during chromatin remodeling. Mol. Cell 14, 163-174 (2004).

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    Citation: A. M. Fowler, E. T. Alarid, Dynamic control of nuclear receptor transcription. Sci. STKE 2004, pe51 (2004).

    © 2004 American Association for the Advancement of Science


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