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5vt0

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Revision as of 19:53, 6 March 2020

Escherichia coli 6S RNA derivative in complex with Escherichia coli RNA polymerase sigma70-holoenzyme

5vt0, resolution 3.78Å

Structural highlights

5vt0 is a 7 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
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), rpoD, alt, b3067, JW3039 (ECOLI)
Activity:	DNA-directed RNA polymerase, with EC number 2.7.7.6
Experimental data:	Check to display Experimental Data
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] [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] [RPOB_ECOLI] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] [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

Noncoding RNAs (ncRNAs) regulate gene expression in all organisms. Bacterial 6S RNAs globally regulate transcription by binding RNA polymerase (RNAP) holoenzyme and competing with promoter DNA. Escherichia coli (Eco) 6S RNA interacts specifically with the housekeeping sigma70-holoenzyme (Esigma70) and plays a key role in the transcriptional reprogramming upon shifts between exponential and stationary phase. Inhibition is relieved upon 6S RNA-templated RNA synthesis. We report here the 3.8 A resolution structure of a complex between 6S RNA and Esigma70 determined by single-particle cryo-electron microscopy and validation of the structure using footprinting and crosslinking approaches. Duplex RNA segments have A-form C3' endo sugar puckers but widened major groove widths, giving the RNA an overall architecture that mimics B-form promoter DNA. Our results help explain the specificity of Eco 6S RNA for Esigma70 and show how an ncRNA can mimic B-form DNA to directly regulate transcription by the DNA-dependent RNAP.

6S RNA Mimics B-Form DNA to Regulate Escherichia coli RNA Polymerase.,Chen J, Wassarman KM, Feng S, Leon K, Feklistov A, Winkelman JT, Li Z, Walz T, Campbell EA, Darst SA Mol Cell. 2017 Oct 19;68(2):388-397.e6. doi: 10.1016/j.molcel.2017.09.006. Epub, 2017 Oct 5. PMID:28988932^[1]

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

References

↑ Chen J, Wassarman KM, Feng S, Leon K, Feklistov A, Winkelman JT, Li Z, Walz T, Campbell EA, Darst SA. 6S RNA Mimics B-Form DNA to Regulate Escherichia coli RNA Polymerase. Mol Cell. 2017 Oct 19;68(2):388-397.e6. doi: 10.1016/j.molcel.2017.09.006. Epub, 2017 Oct 5. PMID:28988932 doi:http://dx.doi.org/10.1016/j.molcel.2017.09.006

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5vt0"

@@ Line 1: / Line 1: @@
 ==Escherichia coli 6S RNA derivative in complex with Escherichia coli RNA polymerase sigma70-holoenzyme==
-<StructureSection load='5vt0' size='340' side='right'caption='[[5vt0]], [[Resolution|resolution]] 3.78&Aring;' scene=''>
+<SX load='5vt0' size='340' side='right' viewer='molstar' caption='[[5vt0]], [[Resolution|resolution]] 3.78&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[5vt0]] is a 7 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=5VT0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5VT0 FirstGlance]. <br>
@@ Line 22: / Line 22: @@
 ==See Also==
-*[[RNA polymerase|RNA polymerase]]
+*[[RNA polymerase 3D structures|RNA polymerase 3D structures]]
+*[[Sigma factor 3D structures|Sigma factor 3D structures]]
 == References ==
 <references/>
 __TOC__
-</StructureSection>
+</SX>
 [[Category: DNA-directed RNA polymerase]]
 [[Category: Ecoli]]

5vt0

From Proteopedia

Revision as of 19:53, 6 March 2020

Escherichia coli 6S RNA derivative in complex with Escherichia coli RNA polymerase sigma70-holoenzyme

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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