ISDA: 2O9L

Deposition Date 2006-12-13

Release Date 2007-07-17

Last Version Date 2023-12-27

Entry Detail

PDB ID:

2O9L

Keywords:

RNA POLYMERASE SIGMA FACTOR RPON/DNA

Title:

AMBER refined NMR Structure of the Sigma-54 RpoN Domain Bound to the-24 Promoter Element

Biological Source:

Source Organism:

Aquifex aeolicus (Taxon ID: 63363)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Calculated:

Conformers Submitted:

Selection Criteria:

all calculated structures submitted

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:RNA polymerase sigma factor RpoN
Gene (Uniprot):rpoN
Chain IDs:C (auth: A)
Chain Length:63
Number of Molecules:1
Biological Source:Aquifex aeolicus

UniProt ID:O66858 Pfam ID:PF04552

Ligand Molecules

Primary Citation

Structural basis of DNA recognition by the alternative sigma-factor, sigma54.

Doucleff, M, Pelton, J.G, Lee, P.S, Nixon, B.T, Wemmer, D.E.Show

J.Mol.Biol. 369 1070 1078 (2007)

PMID: 17481658 DOI: 10.1016/j.jmb.2007.04.019

Abstact

The sigma subunit of bacterial RNA polymerase (RNAP) regulates gene expression by directing RNAP to specific promoters. Unlike sigma(70)-type proteins, the alternative sigma factor, sigma(54), requires interaction with an ATPase to open DNA. We present the solution structure of the C-terminal domain of sigma(54) bound to the -24 promoter element, in which the conserved RpoN box motif inserts into the major groove of the DNA. This structure elucidates the basis for sequence specific recognition of the -24 element, orients sigma(54) on the promoter, and suggests how the C-terminal domain of sigma(54) interacts with RNAP.

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Primary Citation of related structures