1l9z

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[[Image:1l9z.jpg|left|200px]]
[[Image:1l9z.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 1l9z |SIZE=350|CAPTION= <scene name='initialview01'>1l9z</scene>, resolution 6.5&Aring;
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The line below this paragraph, containing "STRUCTURE_1l9z", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=DA:2&#39;-DEOXYADENOSINE-5&#39;-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2&#39;-DEOXYCYTIDINE-5&#39;-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2&#39;-DEOXYGUANOSINE-5&#39;-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5&#39;-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_RNA_polymerase DNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.6 2.7.7.6] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE= rpoD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=271 Thermus aquaticus])
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-->
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|DOMAIN=
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{{STRUCTURE_1l9z| PDB=1l9z | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1l9z FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l9z OCA], [http://www.ebi.ac.uk/pdbsum/1l9z PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1l9z RCSB]</span>
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}}
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'''Thermus aquaticus RNA Polymerase Holoenzyme/Fork-Junction Promoter DNA Complex at 6.5 A Resolution'''
'''Thermus aquaticus RNA Polymerase Holoenzyme/Fork-Junction Promoter DNA Complex at 6.5 A Resolution'''
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[[Category: Murakami, K S.]]
[[Category: Murakami, K S.]]
[[Category: Muzzin, O.]]
[[Category: Muzzin, O.]]
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[[Category: coiled-coil]]
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[[Category: Coiled-coil]]
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[[Category: helix-turn-helix]]
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[[Category: Helix-turn-helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:42:45 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:00:11 2008''
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Revision as of 20:42, 2 May 2008

Image:1l9z.jpg

Template:STRUCTURE 1l9z

Thermus aquaticus RNA Polymerase Holoenzyme/Fork-Junction Promoter DNA Complex at 6.5 A Resolution


Overview

The crystal structure of Thermus aquaticus RNA polymerase holoenzyme (alpha2betabeta'omegasigmaA) complexed with a fork-junction promoter DNA fragment has been determined by fitting high-resolution x-ray structures of individual components into a 6.5-angstrom resolution map. The DNA lies across one face of the holoenzyme, completely outside the RNA polymerase active site channel. All sequence-specific contacts with core promoter elements are mediated by the sigma subunit. A universally conserved tryptophan is ideally positioned to stack on the exposed face of the base pair at the upstream edge of the transcription bubble. Universally conserved basic residues of the sigma subunit provide critical contacts with the DNA phosphate backbone and play a role in directing the melted DNA template strand into the RNA polymerase active site. The structure explains how holoenzyme recognizes promoters containing variably spaced -10 and -35 elements and provides the basis for models of the closed and open promoter complexes.

About this Structure

1L9Z is a Protein complex structure of sequences from Thermus aquaticus. Full crystallographic information is available from OCA.

Reference

Structural basis of transcription initiation: an RNA polymerase holoenzyme-DNA complex., Murakami KS, Masuda S, Campbell EA, Muzzin O, Darst SA, Science. 2002 May 17;296(5571):1285-90. PMID:12016307 Page seeded by OCA on Fri May 2 23:42:45 2008

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OCA

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