2FJB

Adenosine-5'-phosphosulfate reductase im complex with products


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Reaction mechanism of the iron-sulfur flavoenzyme adenosine-5'-phosphosulfate reductase based on the structural characterization of different enzymatic states

Schiffer, A.Fritz, G.Kroneck, P.M.Ermler, U.

(2006) Biochemistry 45: 2960-2967

  • DOI: 10.1021/bi0521689
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The iron-sulfur flavoenzyme adenosine-5'-phosphosulfate (APS) reductase catalyzes a key reaction of the global sulfur cycle by reversibly transforming APS to sulfite and AMP. The structures of the dissimilatory enzyme from Archaeoglobus fulgidus in t ...

    The iron-sulfur flavoenzyme adenosine-5'-phosphosulfate (APS) reductase catalyzes a key reaction of the global sulfur cycle by reversibly transforming APS to sulfite and AMP. The structures of the dissimilatory enzyme from Archaeoglobus fulgidus in the reduced state (FAD(red)) and in the sulfite adduct state (FAD-sulfite-AMP) have been recently elucidated at 1.6 and 2.5 A resolution, respectively. Here we present new structural features of the enzyme trapped in four different catalytically relevant states that provide us with a detailed picture of its reaction cycle. In the oxidized state (FAD(ox)), the isoalloxazine moiety of the FAD cofactor exhibits a similarly bent conformation as observed in the structure of the reduced enzyme. In the APS-bound state (FAD(ox)-APS), the substrate APS is embedded into a 17 A long substrate channel in such a way that the isoalloxazine ring is pushed toward the channel bottom, thereby producing a compressed enzyme-substrate complex. A clamp formed by residues ArgA317 and LeuA278 to fix the adenine ring and the curved APS conformation appear to be key factors to hold APS in a strained conformation. This energy-rich state is relaxed during the attack of APS on the reduced FAD. A relaxed FAD-sulfite adduct is observed in the structure of the FAD-sulfite state. Finally, a FAD-sulfite-AMP1 state with AMP within van der Waals distance of the sulfite adduct could be characterized. This structure documents how adjacent negative charges are stabilized by the protein matrix which is crucial for forming APS from AMP and sulfite in the reverse reaction.


    Organizational Affiliation

    Fachbereich Biologie, Mathematisch-Naturwissenschaftliche Sektion, Universit├Ąt Konstanz, D-78457 Konstanz, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
adenylylsulfate reductase, subunit A
A, C
643Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)Mutation(s): 0 
Find proteins for O28603 (Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126))
Go to UniProtKB:  O28603
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
adenylylsulfate reductase, subunit B
B, D
150Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)Mutation(s): 0 
Find proteins for O28604 (Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126))
Go to UniProtKB:  O28604
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SF4
Query on SF4

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Download CCD File 
B, D
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
NA
Query on NA

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C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SFD
Query on SFD

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Download CCD File 
A, C
(S)-10-((2S,3S,4R)-5-((S)-((S)-(((2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-3,4-DIHYDROXY-TETRAHYDROFURAN-2-YL)METHOXY)(HYDROXY)PHOSPHORYLOXY)(HYDROXY)PHOSPHORYLOXY)-2,3,4-TRIHYDROXYPENTYL)-7,8-DIMETHYL-2,4-DIOXO-2,3,4,4A-TETRAHYDROBENZO[G]PTERIDINE-5(10H)-SULFONIC ACID
N5-SULFONO FLAVIN-ADENINE DINUCLEOTIDE
C27 H35 N9 O18 P2 S
WCBOBURWKHIISA-LDVRFEIFSA-N
 Ligand Interaction
AMP
Query on AMP

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Download CCD File 
A, C
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.168 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.600α = 90.00
b = 113.500β = 90.00
c = 193.900γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-28
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description