4gzz
From Proteopedia
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| - | [[ | + | ==Crystal structures of bacterial RNA Polymerase paused elongation complexes== |
| + | <StructureSection load='4gzz' size='340' side='right' caption='[[4gzz]], [[Resolution|resolution]] 4.29Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4gzz]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus_hb8 Thermus thermophilus hb8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GZZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4GZZ FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">rpoA, TTHA1664 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 Thermus thermophilus HB8]), rpoB, TTHA1813 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 Thermus thermophilus HB8]), rpoC, TTHA1812 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 Thermus thermophilus HB8]), rpoZ, TTHA1561 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 Thermus thermophilus HB8])</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4gzz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4gzz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4gzz RCSB], [http://www.ebi.ac.uk/pdbsum/4gzz PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Transcriptional pausing by multisubunit RNA polymerases (RNAPs) is a key mechanism for regulating gene expression in both prokaryotes and eukaryotes and is a prerequisite for transcription termination. Pausing and termination states are thought to arise through a common, elemental pause state that is inhibitory for nucleotide addition. We report three crystal structures of Thermus RNAP elemental paused elongation complexes (ePECs). The structures reveal the same relaxed, open-clamp RNAP conformation in the ePEC that may arise by failure to re-establish DNA contacts during translocation. A kinked bridge-helix sterically blocks the RNAP active site, explaining how this conformation inhibits RNAP catalytic activity. Our results provide a framework for understanding how RNA hairpin formation stabilizes the paused state and how the ePEC intermediate facilitates termination. | ||
| - | + | Structural basis of transcriptional pausing in bacteria.,Weixlbaumer A, Leon K, Landick R, Darst SA Cell. 2013 Jan 31;152(3):431-41. doi: 10.1016/j.cell.2012.12.020. PMID:23374340<ref>PMID:23374340</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| + | </div> | ||
| - | + | ==See Also== | |
| - | + | *[[RNA polymerase|RNA polymerase]] | |
| - | == | + | == References == |
| - | [[ | + | <references/> |
| + | __TOC__ | ||
| + | </StructureSection> | ||
[[Category: DNA-directed RNA polymerase]] | [[Category: DNA-directed RNA polymerase]] | ||
[[Category: Thermus thermophilus hb8]] | [[Category: Thermus thermophilus hb8]] | ||
| - | [[Category: Darst, S A | + | [[Category: Darst, S A]] |
| - | [[Category: Landick, R | + | [[Category: Landick, R]] |
| - | [[Category: Leon, K | + | [[Category: Leon, K]] |
| - | [[Category: Weixlbaumer, A | + | [[Category: Weixlbaumer, A]] |
[[Category: Dna directed rna transcriptions']] | [[Category: Dna directed rna transcriptions']] | ||
[[Category: Paused transcription elongation complex]] | [[Category: Paused transcription elongation complex]] | ||
Revision as of 09:28, 10 December 2014
Crystal structures of bacterial RNA Polymerase paused elongation complexes
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