ISDA: 6HSM

Deposition Date 2018-10-01

Release Date 2019-01-30

Last Version Date 2024-01-24

Entry Detail

PDB ID:

6HSM

Keywords:

TRANSCRIPTION

Title:

Structure of partially reduced RsrR in space group P2(1)2(1)2(1)

Biological Source:

Source Organism:

Streptomyces venezuelae (strain ATCC 10712 / CBS 650.69 / DSM 40230 / JCM 4526 / NBRC 13096 / PD 04745) (Taxon ID: 953739)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Free:

0.23

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 21 21 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Rrf2 family transcriptional regulator
Gene (Uniprot):SVEN_6563
Chain IDs:A, B (auth: D), C (auth: B), D (auth: C), E, F (auth: G), G (auth: F), H
Chain Length:166
Number of Molecules:8
Biological Source:Streptomyces venezuelae (strain ATCC 10712 / CBS 650.69 / DSM 40230 / JCM 4526 / NBRC 13096 / PD 04745)

UniProt ID:F2RGC9 Pfam ID:PF02082

Ligand Molecules

FES

GOL

MES

MPD

Primary Citation

Crystal Structure of the Transcription Regulator RsrR Reveals a [2Fe-2S] Cluster Coordinated by Cys, Glu, and His Residues.

Volbeda, A, Martinez, M.T.P, Crack, J.C, Amara, P, Gigarel, O, Munnoch, J.T, Hutchings, M.I, Darnault, C, Le Brun, N.E, Fontecilla-Camps, J.C.Show

J. Am. Chem. Soc. 141 2367 2375 (2019)

PMID: 30657661 DOI: 10.1021/jacs.8b10823

Abstact

The recently discovered Rrf2 family transcriptional regulator RsrR coordinates a [2Fe-2S] cluster. Remarkably, binding of the protein to RsrR-regulated promoter DNA sequences is switched on and off through the facile cycling of the [2Fe-2S] cluster between +2 and +1 states. Here, we report high resolution crystal structures of the RsrR dimer, revealing that the [2Fe-2S] cluster is asymmetrically coordinated across the RsrR monomer-monomer interface by two Cys residues from one subunit and His and Glu residues from the other. To our knowledge, this is the first example of a protein bound [Fe-S] cluster with three different amino acid side chains as ligands, and of Glu acting as ligand to a [2Fe-2S] cluster. Analyses of RsrR structures revealed a conformational change, centered on Trp9, which results in a significant shift in the DNA-binding helix-turn-helix region.

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Primary Citation of related structures

Abstact

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