3PUZ

Crystal Structure of a pre-translocation state MBP-Maltose transporter complex bound to AMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of the maltose transporter in a pretranslocation intermediate state.

Oldham, M.L.Chen, J.

(2011) Science 332: 1202-1205

  • DOI: 10.1126/science.1200767
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Adenosine triphosphate (ATP)-binding cassette (ABC) transporters convert chemical energy from ATP hydrolysis to mechanical work for substrate translocation. They function by alternating between two states, exposing the substrate-binding site to eithe ...

    Adenosine triphosphate (ATP)-binding cassette (ABC) transporters convert chemical energy from ATP hydrolysis to mechanical work for substrate translocation. They function by alternating between two states, exposing the substrate-binding site to either side of the membrane. A key question that remains to be addressed is how substrates initiate the transport cycle. Using x-ray crystallography, we have captured the maltose transporter in an intermediate step between the inward- and outward-facing states. We show that interactions with substrate-loaded maltose-binding protein in the periplasm induce a partial closure of the MalK dimer in the cytoplasm. ATP binding to this conformation then promotes progression to the outward-facing state. These results, interpreted in light of biochemical and functional studies, provide a structural basis to understand allosteric communication in ABC transporters.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, Howard Hughes Medical Institute, West Lafayette, IN 47907, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose transporter subunit; periplasmic-binding component of ABC superfamily
E
370Escherichia coli (strain K12)Mutation(s): 2 
Gene Names: malE
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
MalFGK2-MBP Maltose uptake transporter complex
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Maltose transporter subunit; membrane component of ABC superfamily
F
514Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: malF
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
MalFGK2-MBP Maltose uptake transporter complex
Find proteins for P02916 (Escherichia coli (strain K12))
Go to UniProtKB:  P02916
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Maltose transporter subunit; membrane component of ABC superfamily
G
296Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: malG
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
MalFGK2-MBP Maltose uptake transporter complex
Find proteins for P68183 (Escherichia coli (strain K12))
Go to UniProtKB:  P68183
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Fused maltose transport subunit, ATP-binding component of ABC superfamily; regulatory protein
A, B
381Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: malK
EC: 7.5.2.1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
MalFGK2-MBP Maltose uptake transporter complex
Find proteins for P68187 (Escherichia coli (strain K12))
Go to UniProtKB:  P68187
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
E, F
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, B
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PGV
Query on PGV

Download SDF File 
Download CCD File 
F
(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
PHOSPHATIDYLGLYCEROL, 2-VACCENOYL-1-PALMITOYL-SN-GLYCEROL-3-PHOSPHOGLYCEROL
C40 H77 O10 P
ADYWCMPUNIVOEA-GPJPVTGXSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.237 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 80.021α = 90.05
b = 93.360β = 102.57
c = 119.761γ = 105.01
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-12-06 
  • Released Date: 2011-05-18 
  • Deposition Author(s): Oldham, M.L., Chen, J.

Revision History 

  • Version 1.0: 2011-05-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance