Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 273871.28 
• Atom Count: 19124 
• Residue Count: 2508 
• Unique protein chains: 3

1RM6

Structure of 4-hydroxybenzoyl-CoA reductase from Thauera aromatica

• DOI: 10.2210/pdb1RM6/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Thauera aromatica


• Deposited: 2003-11-27 Released: 2004-12-21 
• Deposition Author(s): Unciuleac, M., Warkentin, E., Page, C.C., Dutton, P.L., Boll, M., Ermler, U.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.6 Å
• R-Value Free: 0.173 
• R-Value Work: 0.152 

Literature

Structure of a Xanthine Oxidase-Related 4-Hydroxybenzoyl-CoA Reductase with an Additional [4Fe-4S] Cluster and an Inverted Electron Flow

Unciuleac, M., Warkentin, E., Page, C.C., Boll, M., Ermler, U.

(2004) Structure 12: 2249-2256

• PubMed: 15576037 
• DOI: 10.1016/j.str.2004.10.008
• Primary Citation of Related Structures:  
  1SB3


• PubMed Abstract: 
  

The Mo-flavo-Fe/S-dependent heterohexameric protein complex 4-hydroxybenzoyl-CoA reductase (4-HBCR, dehydroxylating) is a central enzyme of the anaerobic degradation of phenolic compounds and belongs to the xanthine oxidase (XO) family of molybdenum enzymes. Its X-ray structure was established at 1.6 A resolution. The most pronounced difference between 4-HBCR and other structurally characterized members of the XO family is the insertion of 40 amino acids within the beta subunit, which carries an additional [4Fe-4S] cluster at a distance of 16.5 A to the isoalloxazine ring of FAD. The architecture of 4-HBCR and concomitantly performed electron transfer rate calculations suggest an inverted electron transfer chain from the donor ferredoxin via the [4Fe-4S] cluster to the Mo over a distance of 55 A. The binding site of 4-hydroxybenzoyl-CoA is located in an 18 A long channel lined up by several aromatic side chains around the aromatic moiety, which are proposed to shield and stabilize the postulated radical intermediates during catalysis.

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Organizational Affiliation: 

Institut für Biologie II, Mikrobiologie Schänzlestrasse 1, D-79104 Freiburg, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
4-hydroxybenzoyl-CoA reductase alpha subunit	A, D	769	Thauera aromatica	Gene Names: hcrA EC: 1.3.7.9
Find proteins for O33819 (Thauera aromatica) Go to UniProtKB:  O33819

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
4-hydroxybenzoyl-CoA reductase beta subunit	B, E	324	Thauera aromatica	Gene Names: hcrB EC: 1.3.7.9
Find proteins for O33820 (Thauera aromatica) Go to UniProtKB:  O33820

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
4-hydroxybenzoyl-CoA reductase gamma subunit	C, F	161	Thauera aromatica	Gene Names: hcrC EC: 1.3.7.9
Find proteins for O33818 (Thauera aromatica) Go to UniProtKB:  O33818

Small Molecules

Ligands 9 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
K	D	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N
EPE	A, D	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID HEPES C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N
SF4	B, E	IRON/SULFUR CLUSTER Fe4 S4 LJBDFODJNLIPKO-VKOJMFJBAC
NA	A, D	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N
SO4	D	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	A, D	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
FAD	B, E	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
FES	C, F	FE2/S2 (INORGANIC) CLUSTER Fe2 S2 NIXDOXVAJZFRNF-UHFFFAOYSA-N
PCD	A, D	(MOLYBDOPTERIN-CYTOSINE DINUCLEOTIDE-S,S)-DIOXO-AQUA-MOLYBDENUM(V) MOLYBDENUM COFACTOR; MOCO C19 H26 Mo N8 O16 P2 S2 YEBYDVFRFUQMER-NBXMTLLYDD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.6 Å
• R-Value Free: 0.173 
• R-Value Work: 0.152 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 113.015	α = 90.00
b = 151.845	β = 90.00
c = 174.866	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
CNS	refinement
SCALEPACK	data scaling
EPMR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-11-27 
• Released Date: 2004-12-21 
• Deposition Author(s): Unciuleac, M., Warkentin, E., Page, C.C., Dutton, P.L., Boll, M., Ermler, U.

Revision History 

• Version 1.0: 2004-12-21
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance