1UTR

UTEROGLOBIN-PCB COMPLEX (REDUCED FORM)

• PDB DOI: https://doi.org/10.2210/pdb1UTR/pdb

• Classification: MAMMALIAN PCB-BINDING PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-09-01 Released: 1995-12-07 
• Deposition Author(s): Hard, T., Barnes, H.J., Larsson, C., Gustafsson, J.-A., Lund, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

Solution structure of a mammalian PCB-binding protein in complex with a PCB.

Hard, T., Barnes, H.J., Larsson, C., Gustafsson, J.A., Lund, J.

(1995) Nat Struct Biol 2: 983-989

• PubMed: 7583672 
• DOI: https://doi.org/10.1038/nsb1195-983
• Primary Citation of Related Structures:  
  1UTR


• PubMed Abstract: 
  

  Metabolites of polychlorinated biphenyls (PCBs) bind with high affinity to uteroglobin, a small homodimeric protein that also binds progesterone. We present the solution structure of the reduced form of rat uteroglobin in complex with a PCB methylsulphone, (MeSO2)2-TCB. The structure reveals the molecular basis for the accumulation of (MeSO2)2-TCB by uteroglobin. The structure also shows how ligand binding and release might be controlled by reduction/oxidation of two intermolecular disulphide bonds. Breakage of these bonds induces a local unfolding of the N- and C-termini and a separation of helices creating a channel into the binding site. These effects make the ligand binding cavity readily accessible to entry of the ligand.

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Organizational Affiliation: 

Center for Structural Biochemistry, Karolinska Institutet, NOVUM, Huddinge, Sweden.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21.36 kDa 
• Atom Count: 1,066 
• Modelled Residue Count: 136 
• Deposited Residue Count: 192 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UTEROGLOBIN	A, B	96	Rattus norvegicus	Mutation(s): 0  Gene Names: POTENTIAL
UniProt
Find proteins for P17559 (Rattus norvegicus) Explore P17559  Go to UniProtKB:  P17559

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PCB	C [auth A]	4,4'-BIS([H]METHYLSULFONYL)-2,2',5,5'-TETRACHLOROBIPHENYL C14 H10 Cl4 O4 S2 RDBKPLOYRMCFIY-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
PCB	PDBBind:  1UTR	Kd: 10 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-12-07 
Deposition Author(s): Hard, T., Barnes, H.J., Larsson, C., Gustafsson, J.-A., Lund, J.

Revision History  

• Version 1.0: 1995-12-07
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations, Other