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| | ==Crystal Structure Analysis of the E.coli holoenzyme== | | ==Crystal Structure Analysis of the E.coli holoenzyme== |
| - | <StructureSection load='4lk1' size='340' side='right' caption='[[4lk1]], [[Resolution|resolution]] 3.84Å' scene=''> | + | <StructureSection load='4lk1' size='340' side='right'caption='[[4lk1]], [[Resolution|resolution]] 3.84Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4lk1]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecobw Ecobw], [http://en.wikipedia.org/wiki/Ecod1 Ecod1] and [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4LK1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4LK1 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4lk1]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_BW2952 Escherichia coli BW2952], [https://en.wikipedia.org/wiki/Escherichia_coli_DH1 Escherichia coli DH1] and [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4LK1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4LK1 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </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='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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4lk1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lk1 OCA], [https://pdbe.org/4lk1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4lk1 RCSB], [https://www.ebi.ac.uk/pdbsum/4lk1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4lk1 ProSAT]</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>
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| - | <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=4lk1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lk1 OCA], [http://pdbe.org/4lk1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4lk1 RCSB], [http://www.ebi.ac.uk/pdbsum/4lk1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4lk1 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/C9QUL2_ECOD1 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] [[http://www.uniprot.org/uniprot/C9QXI7_ECOD1 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] [[http://www.uniprot.org/uniprot/C5A0S8_ECOBW 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] [[http://www.uniprot.org/uniprot/C9QV90_ECOD1 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] [[http://www.uniprot.org/uniprot/RPOD_ECOLI 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. | + | [https://www.uniprot.org/uniprot/RPOD_ECOLI 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. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[RNA polymerase|RNA polymerase]] | + | *[[RNA polymerase 3D structures|RNA polymerase 3D structures]] |
| - | *[[Sigma factor|Sigma factor]] | + | *[[Sigma factor 3D structures|Sigma factor 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: DNA-directed RNA polymerase]] | + | [[Category: Escherichia coli BW2952]] |
| - | [[Category: Ecobw]] | + | [[Category: Escherichia coli DH1]] |
| - | [[Category: Ecod1]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Ecoli]] | + | [[Category: Large Structures]] |
| - | [[Category: Bae, B]] | + | [[Category: Bae B]] |
| - | [[Category: Darst, S A]] | + | [[Category: Darst SA]] |
| - | [[Category: Transferase]]
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| Structural highlights
Function
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 PubMed
Bacteriophage 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 Also
References
- ↑ Bae B, Davis E, Brown D, Campbell EA, Wigneshweraraj S, Darst SA. Phage T7 Gp2 inhibition of Escherichia coli RNA polymerase involves misappropriation of sigma70 domain 1.1. Proc Natl Acad Sci U S A. 2013 Nov 11. PMID:24218560 doi:http://dx.doi.org/10.1073/pnas.1314576110
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