This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
7xyb
From Proteopedia
(Difference between revisions)
(New page: '''Unreleased structure''' The entry 7xyb is ON HOLD Authors: Description: Category: Unreleased Structures) |
|||
| (4 intermediate revisions not shown.) | |||
| Line 1: | Line 1: | ||
| - | '''Unreleased structure''' | ||
| - | The | + | ==The cryo-EM structure of an AlpA-loaded complex== |
| + | <StructureSection load='7xyb' size='340' side='right'caption='[[7xyb]], [[Resolution|resolution]] 3.70Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[7xyb]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7XYB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7XYB FirstGlance]. <br> | ||
| + | </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></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=7xyb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7xyb OCA], [https://pdbe.org/7xyb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7xyb RCSB], [https://www.ebi.ac.uk/pdbsum/7xyb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7xyb ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[https://www.uniprot.org/uniprot/RPOA_PSEAE RPOA_PSEAE]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_00059] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | AlpA positively regulates a programmed cell death pathway linked to the virulence of Pseudomonas aeruginosa by recognizing an AlpA binding element within the promoter, then binding RNA polymerase directly and allowing it to bypass an intrinsic terminator positioned downstream. Here, we report the single-particle cryo-electron microscopy structures of both an AlpA-loading complex and an AlpA-loaded complex. These structures indicate that the C-terminal helix-turn-helix motif of AlpA binds to the AlpA binding element and that the N-terminal segment of AlpA forms a narrow ring inside the RNA exit channel. AlpA was also revealed to render RNAP resistant to termination signals by prohibiting RNA hairpin formation in the RNA exit channel. Structural analysis predicted that AlpA, 21Q, lambdaQ and 82Q share the same mechanism of transcription antitermination. | ||
| - | + | Structural basis of AlpA-dependent transcription antitermination.,Wen A, Zhao M, Jin S, Lu YQ, Feng Y Nucleic Acids Res. 2022 Aug 12;50(14):8321-8330. doi: 10.1093/nar/gkac608. PMID:35871295<ref>PMID:35871295</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 7xyb" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Pseudomonas aeruginosa]] | ||
| + | [[Category: Feng Y]] | ||
| + | [[Category: Wen A]] | ||
Current revision
The cryo-EM structure of an AlpA-loaded complex
| |||||||||||
