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==Crystal Structure Analysis of the E.coli holoenzyme== | ==Crystal Structure Analysis of the E.coli holoenzyme== | ||
<StructureSection load='4ljz' size='340' side='right' caption='[[4ljz]], [[Resolution|resolution]] 3.59Å' scene=''> | <StructureSection load='4ljz' size='340' side='right' caption='[[4ljz]], [[Resolution|resolution]] 3.59Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">rpoA, EcDH1_0418, ECDH1ME8569_3173 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoB, EcDH1_4008, ECDH1ME8569_3846 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoC, BWG_3647 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=595496 ECOBW]), rpoZ, EcDH1_0056, ECDH1ME8569_3534 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoD, alt, b3067, JW3039 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">rpoA, EcDH1_0418, ECDH1ME8569_3173 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoB, EcDH1_4008, ECDH1ME8569_3846 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoC, BWG_3647 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=595496 ECOBW]), rpoZ, EcDH1_0056, ECDH1ME8569_3534 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=536056 ECOD1]), rpoD, alt, b3067, JW3039 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ljz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ljz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ljz RCSB], [http://www.ebi.ac.uk/pdbsum/4ljz PDBsum]</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=4ljz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ljz OCA], [http://pdbe.org/4ljz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ljz RCSB], [http://www.ebi.ac.uk/pdbsum/4ljz PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4ljz ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 4ljz" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
Revision as of 18:10, 4 August 2016
Crystal Structure Analysis of the E.coli holoenzymeCrystal Structure Analysis of the E.coli holoenzyme
Structural highlights
Function[C9QUL2_ECOD1] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits (By similarity).[HAMAP-Rule:MF_00366][SAAS:SAAS012293_004_017283] [C9QXI7_ECOD1] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (By similarity).[HAMAP-Rule:MF_00059] [C5A0S8_ECOBW] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (By similarity).[SAAS:SAAS012754_004_011999] [C9QV90_ECOD1] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (By similarity).[HAMAP-Rule:MF_01321][RuleBase:RU000432] [RPOD_ECOLI] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This is the primary sigma factor of this bacterium. Publication Abstract from PubMedBacteriophage T7 encodes an essential inhibitor of the Escherichia coli host RNA polymerase (RNAP), the product of gene 2 (Gp2). We determined a series of X-ray crystal structures of E. coli RNAP holoenzyme with or without Gp2. The results define the structure and location of the RNAP sigma70 subunit domain 1.1 inside the RNAP active site channel, where it must be displaced by the DNA upon formation of the open promoter complex. The structures and associated data, combined with previous results, allow for a complete delineation of the mechanism for Gp2 inhibition of E. coli RNAP. In the primary inhibition mechanism, Gp2 forms a protein-protein interaction with , preventing the normal egress of from the RNAP active site channel. Gp2 thus misappropriates a domain of the RNAP holoenzyme, , to inhibit the function of the enzyme. Phage T7 Gp2 inhibition of Escherichia coli RNA polymerase involves misappropriation of sigma70 domain 1.1.,Bae B, Davis E, Brown D, Campbell EA, Wigneshweraraj S, Darst SA Proc Natl Acad Sci U S A. 2013 Nov 11. PMID:24218560[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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