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1nt9
From Proteopedia
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| - | [[Image:1nt9.gif|left|200px]] | + | [[Image:1nt9.gif|left|200px]] |
| - | + | ||
| - | '''Complete 12-subunit RNA polymerase II''' | + | {{Structure |
| + | |PDB= 1nt9 |SIZE=350|CAPTION= <scene name='initialview01'>1nt9</scene>, resolution 4.20Å | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= [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] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Complete 12-subunit RNA polymerase II''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1NT9 is a [ | + | 1NT9 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NT9 OCA]. |
==Reference== | ==Reference== | ||
| - | Architecture of initiation-competent 12-subunit RNA polymerase II., Armache KJ, Kettenberger H, Cramer P, Proc Natl Acad Sci U S A. 2003 Jun 10;100(12):6964-8. Epub 2003 May 13. PMID:[http:// | + | Architecture of initiation-competent 12-subunit RNA polymerase II., Armache KJ, Kettenberger H, Cramer P, Proc Natl Acad Sci U S A. 2003 Jun 10;100(12):6964-8. Epub 2003 May 13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12746495 12746495] |
[[Category: DNA-directed RNA polymerase]] | [[Category: DNA-directed RNA polymerase]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: dna-dependent rna polymerase; cellular rna polymerase; multisubunit complex; transcription; gene expression; mrna; messenger rna synthesis]] | [[Category: dna-dependent rna polymerase; cellular rna polymerase; multisubunit complex; transcription; gene expression; mrna; messenger rna synthesis]] | ||
| - | ''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 13:01:21 2008'' |
Revision as of 11:01, 20 March 2008
| |||||||
| , resolution 4.20Å | |||||||
|---|---|---|---|---|---|---|---|
| Activity: | DNA-directed RNA polymerase, with EC number 2.7.7.6 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Complete 12-subunit RNA polymerase II
Overview
RNA polymerase (Pol) II consists of a 10-polypeptide catalytic core and the two-subunit Rpb4/7 complex that is required for transcription initiation. Previous structures of the Pol II core revealed a "clamp," which binds the DNA template strand via three "switch regions," and a flexible "linker" to the C-terminal repeat domain (CTD). Here we derived a model of the complete Pol II by fitting structures of the core and Rpb4/7 to a 4.2-A crystallographic electron density map. Rpb4/7 protrudes from the polymerase "upstream face," on which initiation factors assemble for promoter DNA loading. Rpb7 forms a wedge between the clamp and the linker, restricting the clamp to a closed position. The wedge allosterically prevents entry of the promoter DNA duplex into the active center cleft and induces in two switch regions a conformation poised for template-strand binding. Interaction of Rpb4/7 with the linker explains Rpb4-mediated recruitment of the CTD phosphatase to the CTD during Pol II recycling. The core-Rpb7 interaction and some functions of Rpb4/7 are apparently conserved in all eukaryotic and archaeal RNA polymerases but not in the bacterial enzyme.
About this Structure
1NT9 is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Architecture of initiation-competent 12-subunit RNA polymerase II., Armache KJ, Kettenberger H, Cramer P, Proc Natl Acad Sci U S A. 2003 Jun 10;100(12):6964-8. Epub 2003 May 13. PMID:12746495
Page seeded by OCA on Thu Mar 20 13:01:21 2008
