3G5U

Structure of P-glycoprotein Reveals a Molecular Basis for Poly-Specific Drug Binding


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.306 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of P-glycoprotein reveals a molecular basis for poly-specific drug binding.

Aller, S.G.Yu, J.Ward, A.Weng, Y.Chittaboina, S.Zhuo, R.Harrell, P.M.Trinh, Y.T.Zhang, Q.Urbatsch, I.L.Chang, G.

(2009) Science 323: 1718-1722

  • DOI: 10.1126/science.1168750
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • P-glycoprotein (P-gp) detoxifies cells by exporting hundreds of chemically unrelated toxins but has been implicated in multidrug resistance (MDR) in the treatment of cancers. Substrate promiscuity is a hallmark of P-gp activity, thus a structural des ...

    P-glycoprotein (P-gp) detoxifies cells by exporting hundreds of chemically unrelated toxins but has been implicated in multidrug resistance (MDR) in the treatment of cancers. Substrate promiscuity is a hallmark of P-gp activity, thus a structural description of poly-specific drug-binding is important for the rational design of anticancer drugs and MDR inhibitors. The x-ray structure of apo P-gp at 3.8 angstroms reveals an internal cavity of approximately 6000 angstroms cubed with a 30 angstrom separation of the two nucleotide-binding domains. Two additional P-gp structures with cyclic peptide inhibitors demonstrate distinct drug-binding sites in the internal cavity capable of stereoselectivity that is based on hydrophobic and aromatic interactions. Apo and drug-bound P-gp structures have portals open to the cytoplasm and the inner leaflet of the lipid bilayer for drug entry. The inward-facing conformation represents an initial stage of the transport cycle that is competent for drug binding.


    Organizational Affiliation

    Department of Molecular Biology, Scripps Research Institute, 10550 North Torrey Pines Road, CB105, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Multidrug resistance protein 1a
A, B
1284Mus musculusMutations: C952A
Gene Names: Abcb1a (Abcb4, Mdr1a, Mdr3, Pgy-3, Pgy3)
EC: 3.6.3.44
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
P-Glycoprotein multi-drug transporter (ABCB1)
Find proteins for P21447 (Mus musculus)
Go to UniProtKB:  P21447
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download SDF File 
Download CCD File 
A, B
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.306 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 97.542α = 90.00
b = 115.426β = 90.00
c = 378.858γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
CNSrefinement
HKL-2000data scaling
HKL-2000data collection
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance