3G60

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.4 Å
  • R-Value Free: 0.365 
  • R-Value Work: 0.314 

wwPDB Validation 3D Report Full Report


This is version 1.2 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 musculusMutation(s): 0 
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
0JZ
Query on 0JZ
Download SDF File 
Download CCD File 
A, B
(4R,11R,18R)-4,11,18-tri(propan-2-yl)-6,13,20-triselena-3,10,17,22,23,24-hexaazatetracyclo[17.2.1.1~5,8~.1~12,15~]tetracosa-1(21),5(24),7,12(23),14,19(22)-hexaene-2,9,16-trione
cyclic-tris-(R)-valineselenazole, QZ59-RRR
C24 H30 N6 O3 Se3
FWRNUSMIPQTUHH-KZNAEPCWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.4 Å
  • R-Value Free: 0.365 
  • R-Value Work: 0.314 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 96.629α = 90.00
b = 115.090β = 90.00
c = 374.204γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

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
  • Version 1.2: 2013-11-13
    Type: Atomic model