1twa
From Proteopedia
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|PDB= 1twa |SIZE=350|CAPTION= <scene name='initialview01'>1twa</scene>, resolution 3.2Å | |PDB= 1twa |SIZE=350|CAPTION= <scene name='initialview01'>1twa</scene>, resolution 3.2Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
| - | |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] | + | |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> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1twc|1TWC]], [[1twf|1TWF]], [[1twg|1TWG]], [[1twh|1TWH]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1twa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1twa OCA], [http://www.ebi.ac.uk/pdbsum/1twa PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1twa RCSB]</span> | ||
}} | }} | ||
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[[Category: Kornberg, R D.]] | [[Category: Kornberg, R D.]] | ||
[[Category: Westover, K D.]] | [[Category: Westover, K D.]] | ||
| - | [[Category: ATP]] | ||
| - | [[Category: MN]] | ||
| - | [[Category: ZN]] | ||
[[Category: molecular machine]] | [[Category: molecular machine]] | ||
[[Category: mrna]] | [[Category: mrna]] | ||
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[[Category: zinc motif]] | [[Category: zinc motif]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:02:01 2008'' |
Revision as of 21:02, 30 March 2008
| |||||||
| , resolution 3.2Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Activity: | DNA-directed RNA polymerase, with EC number 2.7.7.6 | ||||||
| Related: | 1TWC, 1TWF, 1TWG, 1TWH
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
RNA polymerase II complexed with ATP
Overview
Binding of a ribonucleoside triphosphate to an RNA polymerase II transcribing complex, with base pairing to the template DNA, was revealed by X-ray crystallography. Binding of a mismatched nucleoside triphosphate was also detected, but in an adjacent site, inverted with respect to the correctly paired nucleotide. The results are consistent with a two-step mechanism of nucleotide selection, with initial binding to an entry (E) site beneath the active center in an inverted orientation, followed by rotation into the nucleotide addition (A) site for pairing with the template DNA. This mechanism is unrelated to that of single subunit RNA polymerases and so defines a new paradigm for the large, multisubunit enzymes. Additional findings from these studies include a third nucleotide binding site that may define the length of backtracked RNA; DNA double helix unwinding in advance of the polymerase active center; and extension of the diffraction limit of RNA polymerase II crystals to 2.3 A.
About this Structure
1TWA is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Structural basis of transcription: nucleotide selection by rotation in the RNA polymerase II active center., Westover KD, Bushnell DA, Kornberg RD, Cell. 2004 Nov 12;119(4):481-9. PMID:15537538
Page seeded by OCA on Mon Mar 31 00:02:01 2008
