3KBC

Crystal structure of GltPh K55C-A364C mutant crosslinked with divalent mercury


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.51 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.267 

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This is version 1.1 of the entry. See complete history


Literature

Transport mechanism of a bacterial homologue of glutamate transporters.

Reyes, N.Ginter, C.Boudker, O.

(2009) Nature 462: 880-885

  • DOI: 10.1038/nature08616
  • Primary Citation of Related Structures:  
    3KBC

  • PubMed Abstract: 
  • Glutamate transporters are integral membrane proteins that catalyse a thermodynamically uphill uptake of the neurotransmitter glutamate from the synaptic cleft into the cytoplasm of glia and neuronal cells by harnessing the energy of pre-existing electrochemical gradients of ions ...

    Glutamate transporters are integral membrane proteins that catalyse a thermodynamically uphill uptake of the neurotransmitter glutamate from the synaptic cleft into the cytoplasm of glia and neuronal cells by harnessing the energy of pre-existing electrochemical gradients of ions. Crucial to the reaction is the conformational transition of the transporters between outward and inward facing states, in which the substrate binding sites are accessible from the extracellular space and the cytoplasm, respectively. Here we describe the crystal structure of a double cysteine mutant of a glutamate transporter homologue from Pyrococcus horikoshii, Glt(Ph), which is trapped in the inward facing state by cysteine crosslinking. Together with the previously determined crystal structures of Glt(Ph) in the outward facing state, the structure of the crosslinked mutant allows us to propose a molecular mechanism by which Glt(Ph) and, by analogy, mammalian glutamate transporters mediate sodium-coupled substrate uptake.


    Organizational Affiliation

    Department of Physiology and Biophysics, Weill Cornell Medical College, 1300 York Avenue, Box 75, New York, New York 10065, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
425aa long hypothetical proton glutamate symport proteinA, B, C425Pyrococcus horikoshiiMutation(s): 10 
Gene Names: PH1295
Membrane Entity: Yes 
UniProt
Find proteins for O59010 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O59010 
Go to UniProtKB:  O59010
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.51 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.267 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.142α = 90
b = 206.78β = 90
c = 205.971γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
CBASSdata collection
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance