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6ri9

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Revision as of 06:27, 7 August 2019

Cryo-EM structure of E. coli RNA polymerase backtracked elongation complex in non-swiveled state

Structural highlights

6ri9 is a 8 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	6rh3, 6ri7
Gene:	rpoA, pez, phs, sez, b3295, JW3257 (ECOLI), rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 (ECOLI), rpoC, tabB, b3988, JW3951 (ECOLI), rpoZ, b3649, JW3624 (ECOLI)
Activity:	DNA-directed RNA polymerase, with EC number 2.7.7.6
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RPOZ_ECOLI] 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.[HAMAP-Rule:MF_00366] [RPOB_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] [RPOA_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit plays an important role in subunit assembly since its dimerization is the first step in the sequential assembly of subunits to form the holoenzyme.[HAMAP-Rule:MF_00059] [RPOC_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322]

Publication Abstract from PubMed

Regulatory sequences or erroneous incorporations during DNA transcription cause RNA polymerase backtracking and inactivation in all kingdoms of life. Reactivation requires RNA transcript cleavage. Essential transcription factors (GreA and GreB, or TFIIS) accelerate this reaction. We report four cryo-EM reconstructions of Escherichia coli RNA polymerase representing the entire reaction pathway: (1) a backtracked complex; a backtracked complex with GreB (2) before and (3) after RNA cleavage; and (4) a reactivated, substrate-bound complex with GreB before RNA extension. Compared with eukaryotes, the backtracked RNA adopts a different conformation. RNA polymerase conformational changes cause distinct GreB states: a fully engaged GreB before cleavage; a disengaged GreB after cleavage; and a dislodged, loosely bound GreB removed from the active site to allow RNA extension. These reconstructions provide insight into the catalytic mechanism and dynamics of RNA cleavage and extension and suggest how GreB targets backtracked complexes without interfering with canonical transcription.

Structural Basis of Transcription: RNA Polymerase Backtracking and Its Reactivation.,Abdelkareem M, Saint-Andre C, Takacs M, Papai G, Crucifix C, Guo X, Ortiz J, Weixlbaumer A Mol Cell. 2019 May 8. pii: S1097-2765(19)30321-1. doi:, 10.1016/j.molcel.2019.04.029. PMID:31103420^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Abdelkareem M, Saint-Andre C, Takacs M, Papai G, Crucifix C, Guo X, Ortiz J, Weixlbaumer A. Structural Basis of Transcription: RNA Polymerase Backtracking and Its Reactivation. Mol Cell. 2019 May 8. pii: S1097-2765(19)30321-1. doi:, 10.1016/j.molcel.2019.04.029. PMID:31103420 doi:http://dx.doi.org/10.1016/j.molcel.2019.04.029

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6ri9"

@@ Line 3: / Line 3: @@
 <StructureSection load='6ri9' size='340' side='right'caption='[[6ri9]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6ri9]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RI9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6RI9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6ri9]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RI9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6RI9 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>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6rh3|6rh3]], [[6ri7|6ri7]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">rpoA, pez, phs, sez, b3295, JW3257 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), rpoC, tabB, b3988, JW3951 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), rpoZ, b3649, JW3624 ([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='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=6ri9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ri9 OCA], [http://pdbe.org/6ri9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ri9 RCSB], [http://www.ebi.ac.uk/pdbsum/6ri9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ri9 ProSAT]</span></td></tr>
@@ Line 25: / Line 26: @@
 </StructureSection>
 [[Category: DNA-directed RNA polymerase]]
+[[Category: Ecoli]]
 [[Category: Large Structures]]
 [[Category: Abdelkareem, M]]

6ri9

From Proteopedia

Revision as of 06:27, 7 August 2019

Cryo-EM structure of E. coli RNA polymerase backtracked elongation complex in non-swiveled state

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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