1s0v: Difference between revisions
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==Structural basis for substrate selection by T7 RNA polymerase== | ==Structural basis for substrate selection by T7 RNA polymerase== | ||
<StructureSection load='1s0v' size='340' side='right' caption='[[1s0v]], [[Resolution|resolution]] 3.20Å' scene=''> | <StructureSection load='1s0v' size='340' side='right'caption='[[1s0v]], [[Resolution|resolution]] 3.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1s0v]] is a 16 chain structure with sequence from [http://en.wikipedia.org/wiki/Bpt7 Bpt7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1S0V OCA]. For a <b>guided tour on the structure components</b> use [http:// | <table><tr><td colspan='2'>[[1s0v]] is a 16 chain structure with sequence from [http://en.wikipedia.org/wiki/Bpt7 Bpt7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1S0V OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1S0V FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=APC:DIPHOSPHOMETHYLPHOSPHONIC+ACID+ADENOSYL+ESTER'>APC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=APC:DIPHOSPHOMETHYLPHOSPHONIC+ACID+ADENOSYL+ESTER'>APC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1h38|1h38]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1h38|1h38]]</div></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10760 BPT7])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10760 BPT7])</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='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:// | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1s0v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1s0v OCA], [http://pdbe.org/1s0v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1s0v RCSB], [http://www.ebi.ac.uk/pdbsum/1s0v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1s0v ProSAT], [http://www.topsan.org/Proteins/RSGI/1s0v TOPSAN]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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==See Also== | ==See Also== | ||
*[[RNA polymerase|RNA polymerase]] | *[[RNA polymerase 3D structures|RNA polymerase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 40: | Line 40: | ||
[[Category: Bpt7]] | [[Category: Bpt7]] | ||
[[Category: DNA-directed RNA polymerase]] | [[Category: DNA-directed RNA polymerase]] | ||
[[Category: Large Structures]] | |||
[[Category: Anikin, M]] | [[Category: Anikin, M]] | ||
[[Category: McAllister, W T]] | [[Category: McAllister, W T]] | ||
Revision as of 16:37, 16 December 2020
Structural basis for substrate selection by T7 RNA polymeraseStructural basis for substrate selection by T7 RNA polymerase
Structural highlights
Function[RPOL_BPT7] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Responsible for the transcription of the late genes of T7. It is rifampicin-resistant. It recognizes a specific promoter sequence, unwinds the double-stranded RNA to expose the coding strand for templating, initiates transcription preferentially with a purine. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe mechanism by which nucleotide polymerases select the correct substrate is of fundamental importance to the fidelity of DNA replication and transcription. During the nucleotide addition cycle, pol I DNA polymerases undergo the transition from a catalytically inactive "open" to an active "closed" conformation. All known determinants of substrate selection are associated with the "closed" state. To elucidate if this mechanism is conserved in homologous single subunit RNA polymerases (RNAPs), we have determined the structure of T7 RNAP elongation complex with the incoming substrate analog. Surprisingly, the substrate specifically binds to RNAP in the "open" conformation, where it is base paired with the acceptor template base, while Tyr639 provides discrimination of ribose versus deoxyribose substrates. The structure therefore suggests a novel mechanism, in which the substrate selection occurs prior to the isomerization to the catalytically active conformation. Modeling of multisubunit RNAPs suggests that this mechanism might be universal for all RNAPs. Structural basis for substrate selection by t7 RNA polymerase.,Temiakov D, Patlan V, Anikin M, McAllister WT, Yokoyama S, Vassylyev DG Cell. 2004 Feb 6;116(3):381-91. PMID:15016373[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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