1G29

MALK


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of MalK, the ATPase subunit of the trehalose/maltose ABC transporter of the archaeon Thermococcus litoralis.

Diederichs, K.Diez, J.Greller, G.Muller, C.Breed, J.Schnell, C.Vonrhein, C.Boos, W.Welte, W.

(2000) EMBO J. 19: 5951-5961

  • DOI: 10.1093/emboj/19.22.5951

  • PubMed Abstract: 
  • The members of the ABC transporter family transport a wide variety of molecules into or out of cells and cellular compartments. Apart from a translocation pore, each member possesses two similar nucleoside triphosphate-binding subunits or domains in ...

    The members of the ABC transporter family transport a wide variety of molecules into or out of cells and cellular compartments. Apart from a translocation pore, each member possesses two similar nucleoside triphosphate-binding subunits or domains in order to couple the energy-providing reaction with transport. In the maltose transporter of several Gram-negative bacteria and the archaeon Thermo coccus litoralis, the nucleoside triphosphate-binding subunit contains a C-terminal regulatory domain. A dimer of the subunit is attached cytoplasmically to the translocation pore. Here we report the crystal structure of this dimer showing two bound pyrophosphate molecules at 1.9 A resolution. The dimer forms by association of the ATPase domains, with the two regulatory domains attached at opposite poles. Significant deviation from 2-fold symmetry is seen at the interface of the dimer and in the regions corresponding to those residues known to be in contact with the translocation pore. The structure and its relationship to function are discussed in the light of known mutations from the homologous Escherichia coli and Salmonella typhimurium proteins.


    Organizational Affiliation

    Fachbereich Biologie, Universit├Ąt Konstanz, M656, D-78457 Konstanz, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MALTOSE TRANSPORT PROTEIN MALK
1, 2
372Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C)Mutation(s): 0 
Gene Names: malK
EC: 7.5.2.1
Find proteins for Q9YGA6 (Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C))
Go to UniProtKB:  Q9YGA6
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
POP
Query on POP

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1, 2
PYROPHOSPHATE 2-
H2 O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-L
 Ligand Interaction
NA
Query on NA

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Download CCD File 
1, 2
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
1, 2
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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1, 2
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NH4
Query on NH4

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1, 2
AMMONIUM ION
H4 N
QGZKDVFQNNGYKY-UHFFFAOYSA-O
 Ligand Interaction
DIO
Query on DIO

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Download CCD File 
1
1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 190.718α = 90.00
b = 65.705β = 90.00
c = 77.912γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MAR345data collection
XDSdata scaling
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-12-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description