6edt
From Proteopedia
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==Mycobacterium tuberculosis RNAP open promoter complex with RbpA/CarD and AP3 promoter== | ==Mycobacterium tuberculosis RNAP open promoter complex with RbpA/CarD and AP3 promoter== | ||
| - | <SX load='6edt' size='340' side='right' viewer='molstar' caption='[[6edt]]' scene=''> | + | <SX load='6edt' size='340' side='right' viewer='molstar' caption='[[6edt]], [[Resolution|resolution]] 3.60Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6edt]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EDT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EDT FirstGlance]. <br> | <table><tr><td colspan='2'>[[6edt]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EDT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EDT FirstGlance]. <br> | ||
| - | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.6Å</td></tr> |
<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='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'>[https://proteopedia.org/fgij/fg.htm?mol=6edt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6edt OCA], [https://pdbe.org/6edt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6edt RCSB], [https://www.ebi.ac.uk/pdbsum/6edt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6edt ProSAT]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6edt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6edt OCA], [https://pdbe.org/6edt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6edt RCSB], [https://www.ebi.ac.uk/pdbsum/6edt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6edt ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| - | [https://www.uniprot.org/uniprot/ | + | [https://www.uniprot.org/uniprot/RPOA_MYCTU RPOA_MYCTU] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_00059]<ref>PMID:22570422</ref> |
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | A key regulated step of transcription is promoter melting by RNA polymerase (RNAP) to form the open promoter complex(1-3). To generate the open complex, the conserved catalytic core of the RNAP combines with initiation factors to locate promoter DNA, unwind 12-14 base pairs of the DNA duplex and load the template-strand DNA into the RNAP active site. Formation of the open complex is a multi-step process during which transient intermediates of unknown structure are formed(4-6). Here we present cryo-electron microscopy structures of bacterial RNAP-promoter DNA complexes, including structures of partially melted intermediates. The structures show that late steps of promoter melting occur within the RNAP cleft, delineate key roles for fork-loop 2 and switch 2-universal structural features of RNAP-in restricting access of DNA to the RNAP active site, and explain why clamp opening is required to allow entry of single-stranded template DNA into the active site. The key roles of fork-loop 2 and switch 2 suggest a common mechanism for late steps in promoter DNA opening to enable gene expression across all domains of life. | ||
| + | |||
| + | Structures of an RNA polymerase promoter melting intermediate elucidate DNA unwinding.,Boyaci H, Chen J, Jansen R, Darst SA, Campbell EA Nature. 2019 Jan;565(7739):382-385. doi: 10.1038/s41586-018-0840-5. Epub 2019 Jan, 9. PMID:30626968<ref>PMID:30626968</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6edt" style="background-color:#fffaf0;"></div> | ||
==See Also== | ==See Also== | ||
Revision as of 06:40, 19 March 2025
Mycobacterium tuberculosis RNAP open promoter complex with RbpA/CarD and AP3 promoter
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