5KOY

Mouse pgp 34 linker deleted bound with ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.85 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.248 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the Multidrug Transporter P-glycoprotein Reveal Asymmetric ATP Binding and the Mechanism of Polyspecificity.

Esser, L.Zhou, F.Pluchino, K.M.Shiloach, J.Ma, J.Tang, W.K.Gutierrez, C.Zhang, A.Shukla, S.Madigan, J.P.Zhou, T.Kwong, P.D.Ambudkar, S.V.Gottesman, M.M.Xia, D.

(2017) J Biol Chem 292: 446-461

  • DOI: 10.1074/jbc.M116.755884
  • Primary Citation of Related Structures:  
    5KO2, 5KPJ, 5KPD, 5KPI, 5KOY

  • PubMed Abstract: 
  • P-glycoprotein (P-gp) is a polyspecific ATP-dependent transporter linked to multidrug resistance in cancer; it plays important roles in determining the pharmacokinetics of many drugs. Understanding the structural basis of P-gp, substrate polyspecificity has been hampered by its intrinsic flexibility, which is facilitated by a 75-residue linker that connects the two halves of P-gp ...

    P-glycoprotein (P-gp) is a polyspecific ATP-dependent transporter linked to multidrug resistance in cancer; it plays important roles in determining the pharmacokinetics of many drugs. Understanding the structural basis of P-gp, substrate polyspecificity has been hampered by its intrinsic flexibility, which is facilitated by a 75-residue linker that connects the two halves of P-gp. Here we constructed a mutant murine P-gp with a shortened linker to facilitate structural determination. Despite dramatic reduction in rhodamine 123 and calcein-AM transport, the linker-shortened mutant P-gp possesses basal ATPase activity and binds ATP only in its N-terminal nucleotide-binding domain. Nine independently determined structures of wild type, the linker mutant, and a methylated P-gp at up to 3.3 Å resolution display significant movements of individual transmembrane domain helices, which correlated with the opening and closing motion of the two halves of P-gp. The open-and-close motion alters the surface topology of P-gp within the drug-binding pocket, providing a mechanistic explanation for the polyspecificity of P-gp in substrate interactions.


    Organizational Affiliation

    From the Laboratory of Cell Biology, Center for Cancer Research, NCI, xiad@mail.nih.gov.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Multidrug resistance protein 1AA, B1248Mus musculusMutation(s): 1 
Gene Names: Abcb1aAbcb4Mdr1aMdr3Pgy-3Pgy3
EC: 3.6.3.44 (PDB Primary Data), 7.6.2.2 (UniProt), 7.6.2.1 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P21447 (Mus musculus)
Explore P21447 
Go to UniProtKB:  P21447
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP (Subject of Investigation/LOI)
Query on ATP

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.85 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.248 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.52α = 90
b = 116.439β = 90
c = 375.052γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
MOLREPphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-12-14
    Type: Initial release
  • Version 1.1: 2017-01-25
    Changes: Database references