4Q9H

P-glycoprotein at 3.4 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Snapshots of ligand entry, malleable binding and induced helical movement in P-glycoprotein.

Szewczyk, P.Tao, H.McGrath, A.P.Villaluz, M.Rees, S.D.Lee, S.C.Doshi, R.Urbatsch, I.L.Zhang, Q.Chang, G.

(2015) Acta Crystallogr.,Sect.D 71: 732-741

  • DOI: 10.1107/S1399004715000978
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • P-glycoprotein (P-gp) is a transporter of great clinical and pharmacological significance. Several structural studies of P-gp and its homologs have provided insights into its transport cycle, but questions remain regarding how P-gp recognizes diverse ...

    P-glycoprotein (P-gp) is a transporter of great clinical and pharmacological significance. Several structural studies of P-gp and its homologs have provided insights into its transport cycle, but questions remain regarding how P-gp recognizes diverse substrates and how substrate binding is coupled to ATP hydrolysis. Here, four new P-gp co-crystal structures with a series of rationally designed ligands are presented. It is observed that the binding of certain ligands, including an ATP-hydrolysis stimulator, produces a large conformational change in the fourth transmembrane helix, which is positioned to potentially transmit a signal to the nucleotide-binding domains. A new ligand-binding site on the surface of P-gp facing the inner leaflet of the membrane is also described, providing vital insights regarding the entry mechanism of hydrophobic drugs and lipids into P-gp. These results represent significant advances in the understanding of how P-gp and related transporters bind and export a plethora of metabolites, antibiotics and clinically approved and pipeline drugs.


    Organizational Affiliation

    Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92023, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Multidrug resistance protein 1A
A
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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.260 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 87.950α = 90.00
b = 139.180β = 90.00
c = 186.030γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHENIXrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-04
    Type: Initial release
  • Version 1.1: 2015-03-18
    Type: Database references