Biological Assembly 1

Protein Symmetry: Cyclic - C2 (View in 3D)

Protein Stoichiometry: Hetero 6-mer - A2B2C2

Macromolecule Content

• Unique protein chains: 3

1FIQ

CRYSTAL STRUCTURE OF XANTHINE OXIDASE FROM BOVINE MILK

• DOI: 10.2210/pdb1fiq/pdb

• Classification: OXIDOREDUCTASE
• Deposited: 2000-08-04 Released: 2000-10-04
• Deposition author(s): Enroth, C., Eger, B.T., Okamoto, K., Nishino, T., Nishino, T., Pai, E.F.
• Organism: Bos taurus

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.275
• R-Value Work: 0.212

wwPDB Validation 3D Report Full Report

Literature

Macromolecules

Classification: OXIDOREDUCTASE

Total Structure Weight: 148953.16

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions	3D Interactions
FAD	B	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N	Poseview Image of FAD in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)
MTE	C	PHOSPHONIC ACIDMONO-(2-AMINO-5,6-DIMERCAPTO- 4-OXO-3,7,8A,9,10,10A-HEXAHYDRO-4H-8-OXA- 1,3,9,10-TETRAAZA-ANTHRACEN-7-YLMETHYL)ESTER C10 H14 N5 O6 P S2 HPEUEJRPDGMIMY-IFQPEPLCSA-N	Poseview Image of MTE in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)
FES	A	FE2/S2 (INORGANIC) CLUSTER Fe2 S2 NIXDOXVAJZFRNF-UHFFFAOYSA-N	Poseview Image of FES in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)
MOS	C	DIOXOTHIOMOLYBDENUM(VI) ION H Mo O2 S BDSRWPHSAKXXRG-UHFFFAOYSA-M	Poseview Image of MOS in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)
SAL	C	2-HYDROXYBENZOIC ACID SALICYLIC ACID (Synonym) C7 H6 O3 YGSDEFSMJLZEOE-UHFFFAOYSA-N	Poseview Image of SAL in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)
GOL	C	GLYCEROL 2, (Synonym) C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N	Poseview Image of GOL in 1FIQ Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL   Binding Pocket (JSmol)   Electron Density (JSmol)

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
SAL	Ki: 100000000 nM (99) BindingDB N/A in BindingMoad N/A in PDBbind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.275
• R-Value Work: 0.212
• Space Group: C 2 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 117.83	α = 90.00
b = 165.40	β = 90.00
c = 154.45	γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots

Entry History

Deposition Data

• Deposited Date: 2000-08-04
• Released Date: 2000-10-04
• Deposition author(s): Enroth, C., Eger, B.T., Okamoto, K., Nishino, T., Nishino, T., Pai, E.F.

Revision History

• 2008-04-27
  Type: Version format compliance
• 2011-07-13
  Type: Derived calculations, Version format compliance
• 2017-02-01
  Type: Structure summary