Crystal structure of GlcV, the ABC-ATPase of the glucose ABC transporter from Sulfolobus solfataricus

Experimental Data Snapshot

  • Resolution: 1.45 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

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Formation of the productive ATP-Mg2+-bound dimer of GlcV, an ABC-ATPase from Sulfolobus solfataricus

Verdon, G.Albers, S.-V.van Oosterwijk, N.Dijkstra, B.W.Driessen, A.J.M.Thunnissen, A.M.W.H.

(2003) J Mol Biol 334: 255-267

  • DOI: https://doi.org/10.1016/j.jmb.2003.08.065
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The ABC-ATPase GlcV from Sulfolobus solfataricus energizes an ABC transporter mediating glucose uptake. In ABC transporters, two ABC-ATPases are believed to form a head-to-tail dimer, with both monomers contributing conserved residues to each of the two productive active sites. In contrast, isolated GlcV, although active, behaves apparently as a monomer in the presence of ATP-Mg(2+), AMPPNP-Mg(2+) or ATP alone. To resolve the oligomeric state of the active form of GlcV, we analysed the effects of changing the putative catalytic base, residue E166, into glutamine or alanine. Both mutants are, to different extents, defective in ATP hydrolysis, and gel-filtration experiments revealed their dimerization in the presence of ATP-Mg(2+). Mutant E166Q forms dimers also in the presence of ATP alone, without Mg(2+), whereas dimerization of mutant E166A requires both ATP and Mg(2+). These results confirm earlier reports for other ABC-ATPases, but for the first time suggest the occurrence of a fast equilibrium between ATP-bound monomers and ATP-bound dimers. We further mutated two highly conserved residues of the ABC signature motif, S142 and G144, into alanine. The G144A mutant is completely inactive and fails to dimerize, indicating an essential role of this residue in stabilizing the productive dimeric state. Mutant S142A retained considerable activity, and was able to dimerize, thus implying that the interaction of the serine with ATP is not essential for dimerization and catalysis. Furthermore, although the E166A and G144A mutants each alone are inactive, they produce an active heterodimer, showing that disruption of one active site can be tolerated. Our data suggest that ABC-ATPases with partially degenerated catalytic machineries, as they occur in vivo, can still form productive dimers to drive transport.

  • Organizational Affiliation

    Laboratory of Biophysical Chemistry, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ABC transporter, ATP binding proteinA [auth K]353Saccharolobus solfataricusMutation(s): 1 
Gene Names: glcV
Find proteins for Q97UY8 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q97UY8 
Go to UniProtKB:  Q97UY8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ97UY8
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on IOD

Download Ideal Coordinates CCD File 
AA [auth K]
B [auth K]
BA [auth K]
C [auth K]
CA [auth K]
AA [auth K],
B [auth K],
BA [auth K],
C [auth K],
CA [auth K],
D [auth K],
DA [auth K],
E [auth K],
EA [auth K],
F [auth K],
FA [auth K],
G [auth K],
GA [auth K],
H [auth K],
I [auth K],
J [auth K],
L [auth K],
M [auth K],
N [auth K],
O [auth K],
P [auth K],
Q [auth K],
R [auth K],
S [auth K],
T [auth K],
U [auth K],
V [auth K],
W [auth K],
X [auth K],
Y [auth K],
Z [auth K]
Experimental Data & Validation

Experimental Data

  • Resolution: 1.45 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.282α = 90
b = 48.427β = 90
c = 183.533γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-02-14
    Changes: Data collection