1JM1

Crystal structure of the soluble domain of the Rieske protein II (soxF) from Sulfolobus acidocaldarius

PDB DOI: 10.2210/pdb1JM1/pdb

Classification: electron transport, oxidoreductase
Organism(s): Sulfolobus acidocaldarius
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2001-07-17 Released: 2002-07-17
Deposition Author(s): Boenisch, H., Schmidt, C.L., Schaefer, G., Ladenstein, R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.11 Å
R-Value Free: 0.125
R-Value Work: 0.106
R-Value Observed: 0.106

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

The structure of the soluble domain of an archaeal Rieske iron-sulfur protein at 1.1 A resolution.

Bonisch, H., Schmidt, C.L., Schafer, G., Ladenstein, R.

(2002) J Mol Biol 319: 791-805

PubMed: 12054871 Search on PubMed
DOI: 10.1016/S0022-2836(02)00323-6
Primary Citation of Related Structures:
1JM1

PubMed Abstract:

The first crystal structure of an archaeal Rieske iron-sulfur protein, the soluble domain of Rieske iron-sulfur protein II (soxF) from the hyperthermo-acidophile Sulfolobus acidocaldarius, has been solved by multiple wavelength anomalous dispersion (MAD) and has been refined to 1.1 A resolution. SoxF is a subunit of the terminal oxidase supercomplex SoxM in the plasma membrane of S. acidocaldarius that combines features of a cytochrome bc(1) complex and a cytochrome c oxidase. The [2Fe-2S] cluster of soxF is most likely the primary electron acceptor during the oxidation of caldariella quinone by the cytochrome a(587)/Rieske subcomplex. The geometry of the [2Fe-2S] cluster and the structure of the cluster-binding site are almost identical in soxF and the Rieske proteins from eucaryal cytochrome bc(1) and b(6)f complexes, suggesting a strict conservation of the catalytic mechanism. The main domain of soxF and part of the cluster-binding domain, though structurally related, show a significantly divergent structure with respect to topology, non-covalent interactions and surface charges. The divergent structure of soxF reflects a different topology of the soxM complex compared to eucaryal bc complexes and the adaptation of the protein to the extreme ambient conditions on the outer membrane surface of a hyperthermo-acidophilic organism.

Related Citations:

Crystallization and preliminary crystallographic analysis of Rieske iron-sulfur protein II (soxF) from Sulfolobus acidocaldarius
Boenisch, H., Schmidt, C.L., Schaefer, G., Ladenstein, R.
(2000) Acta Crystallogr D Biol Crystallogr 56: 643

Expression of the Sulfolobus acidocaldarius Rieske iron sulfur protein II (soxF) with the correctly inserted [2Fe-2S] cluster in Escherichia coli
Schmidt, C.L., Hatzfeld, O.M., Petersen, A., Link, T.A., Schaefer, G.
(1997) Biochem Biophys Res Commun 234: 283

Organizational Affiliation:

Department of Biosciences at NOVUM, Center for Structural Biochemistry, Karolinska Institutet, Hälsovägen 7-9, S-14157 Huddinge, Sweden.

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Rieske iron-sulfur protein soxF	A	204	Sulfolobus acidocaldarius	Mutation(s): 0 Gene Names: soxF, ATY89_06800, ATZ20_09820
UniProt
Find proteins for Q53766 (Sulfolobus acidocaldarius) Explore Q53766 Go to UniProtKB: Q53766
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q53766
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
FES Query on FES Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A]	C [auth A]	FE2/S2 (INORGANIC) CLUSTER Fe₂ S₂ NIXDOXVAJZFRNF-UHFFFAOYSA-N		Ligand Interaction
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A]	B [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Ligand Interaction