1pv4: Difference between revisions
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[[Image:1pv4.gif|left|200px]] | [[Image:1pv4.gif|left|200px]] | ||
'''X-ray crystal structure of the Rho transcription termination factor in complex with single stranded DNA''' | {{Structure | ||
|PDB= 1pv4 |SIZE=350|CAPTION= <scene name='initialview01'>1pv4</scene>, resolution 3.00Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= | |||
|GENE= RHO ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |||
}} | |||
'''X-ray crystal structure of the Rho transcription termination factor in complex with single stranded DNA''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1PV4 is a [ | 1PV4 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PV4 OCA]. | ||
==Reference== | ==Reference== | ||
Structure of the Rho transcription terminator: mechanism of mRNA recognition and helicase loading., Skordalakes E, Berger JM, Cell. 2003 Jul 11;114(1):135-46. PMID:[http:// | Structure of the Rho transcription terminator: mechanism of mRNA recognition and helicase loading., Skordalakes E, Berger JM, Cell. 2003 Jul 11;114(1):135-46. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12859904 12859904] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: protein-ssdna complex]] | [[Category: protein-ssdna complex]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:29:22 2008'' | ||
Revision as of 11:29, 20 March 2008
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| 1pv4, resolution 3.00Å | |||||||||||||
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| Gene: | RHO (Escherichia coli) | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
X-ray crystal structure of the Rho transcription termination factor in complex with single stranded DNA
Overview
In bacteria, one of the major transcriptional termination mechanisms requires a RNA/DNA helicase known as the Rho factor. We have determined two structures of Rho complexed with nucleic acid recognition site mimics in both free and nucleotide bound states to 3.0 A resolution. Both structures show that Rho forms a hexameric ring in which two RNA binding sites--a primary one responsible for target mRNA recognition and a secondary one required for mRNA translocation and unwinding--point toward the center of the ring. Rather than forming a closed ring, the Rho hexamer is split open, resembling a "lock washer" in its global architecture. The distance between subunits at the opening is sufficiently wide (12 A) to accommodate single-stranded RNA. This open configuration most likely resembles a state poised to load onto mRNA and suggests how related ring-shaped enzymes may be breached to bind nucleic acids.
About this Structure
1PV4 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Structure of the Rho transcription terminator: mechanism of mRNA recognition and helicase loading., Skordalakes E, Berger JM, Cell. 2003 Jul 11;114(1):135-46. PMID:12859904
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