2B8W

Crystal-structure of the N-terminal Large GTPase Domain of human Guanylate Binding protein 1 (hGBP1) in complex with GMP/AlF4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

How guanylate-binding proteins achieve assembly-stimulated processive cleavage of GTP to GMP.

Ghosh, A.Praefcke, G.J.Renault, L.Wittinghofer, A.Herrmann, C.

(2006) Nature 440: 101-104

  • DOI: 10.1038/nature04510
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Interferons are immunomodulatory cytokines that mediate anti-pathogenic and anti-proliferative effects in cells. Interferon-gamma-inducible human guanylate binding protein 1 (hGBP1) belongs to the family of dynamin-related large GTP-binding proteins, ...

    Interferons are immunomodulatory cytokines that mediate anti-pathogenic and anti-proliferative effects in cells. Interferon-gamma-inducible human guanylate binding protein 1 (hGBP1) belongs to the family of dynamin-related large GTP-binding proteins, which share biochemical properties not found in other families of GTP-binding proteins such as nucleotide-dependent oligomerization and fast cooperative GTPase activity. hGBP1 has an additional property by which it hydrolyses GTP to GMP in two consecutive cleavage reactions. Here we show that the isolated amino-terminal G domain of hGBP1 retains the main enzymatic properties of the full-length protein and can cleave GDP directly. Crystal structures of the N-terminal G domain trapped at successive steps along the reaction pathway and biochemical data reveal the molecular basis for nucleotide-dependent homodimerization and cleavage of GTP. Similar to effector binding in other GTP-binding proteins, homodimerization is regulated by structural changes in the switch regions. Homodimerization generates a conformation in which an arginine finger and a serine are oriented for efficient catalysis. Positioning of the substrate for the second hydrolysis step is achieved by a change in nucleotide conformation at the ribose that keeps the guanine base interactions intact and positions the beta-phosphates in the gamma-phosphate-binding site.


    Related Citations: 
    • Structure of human guanylate-binding protein 1 representing a unique class of GTP-binding proteins.
      Prakash, B.,Praefcke, G.J.,Renault, L.,Herrmann, C.,Wittinghofer, A.
      (2000) Nature 403: 567
    • Triphosphate structure of guanylate-binding protein 1 and implications for nucleotide binding and GTPase mechanism.
      Prakash, B.,Renault, L.,Praefcke, G.J.,Herrmann, C.,Wittinghofer, A.
      (2000) Embo J. 19: 4555


    Organizational Affiliation

    Abteilung Strukturelle Biologie, Max-Planck-Institut für Molekulare Physiologie, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon-induced guanylate-binding protein 1
A, B
328Homo sapiensMutation(s): 0 
Gene Names: GBP1
EC: 3.6.5.-
Find proteins for P32455 (Homo sapiens)
Go to Gene View: GBP1
Go to UniProtKB:  P32455
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ALF
Query on ALF

Download SDF File 
Download CCD File 
A, B
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
5GP
Query on 5GP

Download SDF File 
Download CCD File 
A, B
GUANOSINE-5'-MONOPHOSPHATE
C10 H14 N5 O8 P
RQFCJASXJCIDSX-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 149.617α = 90.00
b = 101.927β = 90.00
c = 54.121γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
AMoREphasing
XDSdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description