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4s20
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==Structural basis for transcription reactivation by RapA== | ==Structural basis for transcription reactivation by RapA== | ||
| - | <StructureSection load='4s20' size='340' side='right' caption='[[4s20]], [[Resolution|resolution]] 4.70Å' scene=''> | + | <StructureSection load='4s20' size='340' side='right'caption='[[4s20]], [[Resolution|resolution]] 4.70Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[4s20]] is a 16 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4S20 OCA]. For a <b>guided tour on the structure components</b> use [ | + | <table><tr><td colspan='2'>[[4s20]] is a 16 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4S20 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4S20 FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 4.7Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4s20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4s20 OCA], [https://pdbe.org/4s20 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4s20 RCSB], [https://www.ebi.ac.uk/pdbsum/4s20 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4s20 ProSAT]</span></td></tr> |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [https://www.uniprot.org/uniprot/RPOB_ECOLI RPOB_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] |
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | RNA polymerase (RNAP) loses activity during transcription as it stalls at various inactive states due to erratic translocation. Reactivation of these stalled RNAPs is essential for efficient RNA synthesis. Here we report a 4.7-A resolution crystal structure of the Escherichia coli RNAP core enzyme in complex with ATPase RapA that is involved in reactivating stalled RNAPs. The structure reveals that RapA binds at the RNA exit channel of the RNAP and makes the channel unable to accommodate the formation of an RNA hairpin. The orientation of RapA on the RNAP core complex suggests that RapA uses its ATPase activity to propel backward translocation of RNAP along the DNA template in an elongation complex. This structure provides insights into the reactivation of stalled RNA polymerases and helps support ATP-driven backward translocation as a general mechanism for transcriptional regulation. | ||
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| + | Structural basis for transcription reactivation by RapA.,Liu B, Zuo Y, Steitz TA Proc Natl Acad Sci U S A. 2015 Feb 2. pii: 201417152. PMID:25646438<ref>PMID:25646438</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 4s20" style="background-color:#fffaf0;"></div> | ||
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| + | ==See Also== | ||
| + | *[[Helicase 3D structures|Helicase 3D structures]] | ||
| + | *[[RNA polymerase 3D structures|RNA polymerase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Escherichia coli]] |
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Liu B]] |
| - | [[Category: | + | [[Category: Steitz TA]] |
| - | [[Category: | + | [[Category: Zuo Y]] |
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Current revision
Structural basis for transcription reactivation by RapA
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