1RBO

SPINACH RUBISCO IN COMPLEX WITH THE INHIBITOR 2-CARBOXYARABINITOL-1,5-DIPHOSPHATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.154 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A common structural basis for the inhibition of ribulose 1,5-bisphosphate carboxylase by 4-carboxyarabinitol 1,5-bisphosphate and xylulose 1,5-bisphosphate.

Taylor, T.C.Fothergill, M.D.Andersson, I.

(1996) J.Biol.Chem. 271: 32894-32899

  • Primary Citation of Related Structures:  1RCO

  • PubMed Abstract: 
  • Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalyzes the carboxylation of ribulose 1,5-bisphosphate. The reaction catalyzed by Rubisco involves several steps, some of which can occur as partial reactions, forming intermediates that can ...

    Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalyzes the carboxylation of ribulose 1,5-bisphosphate. The reaction catalyzed by Rubisco involves several steps, some of which can occur as partial reactions, forming intermediates that can be isolated. Analogues of these intermediates are potent inhibitors of the enzyme. We have studied the interactions with the enzyme of two inhibitors, xylulose 1,5-bisphosphate and 4-carboxyarabinitol 1,5-bisphosphate, by x-ray crystallography. Crystals of the complexes were formed by cocrystallization under activating conditions. In addition, 4-carboxyarabinitol 1,5-bisphosphate was soaked into preformed activated crystals of the enzyme. The result of these experiments was the release of the activating CO2 molecule as well as the metal ion from the active site when the inhibitors bound to the enzyme. Comparison with the structure of an activated complex of the enzyme indicates that the structural basis for the release of the activator groups is a distortion of the metal binding site due to the different geometry of the C-3 hydroxyl of the inhibitors. Both inhibitors induce closure of active site loops despite the inactivated state of the enzyme. Xylulose 1,5-bisphosphate binds in a hydrated form at the active site.


    Related Citations: 
    • Large Structures at High Resolution: The 1.6 A Crystal Structure of Spinach Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Complexed with 2-Carboxyarabinitol Bisphosphate
      Andersson, I.
      (1996) J.Mol.Biol. 259: 160


    Organizational Affiliation

    Department of Molecular Biology, Swedish University of Agricultural Sciences, P. O. Box 590, S-751 24 Uppsala, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBULOSE BISPHOSPHATE CARBOXYLASE/OXYGENASE
L, B, E, H
475Spinacia oleraceaGene Names: rbcL
EC: 4.1.1.39
Find proteins for P00875 (Spinacia oleracea)
Go to UniProtKB:  P00875
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RIBULOSE BISPHOSPHATE CARBOXYLASE/OXYGENASE
S, C, F, I
123Spinacia oleraceaGene Names: RBCS
EC: 4.1.1.39
Find proteins for P00870 (Spinacia oleracea)
Go to UniProtKB:  P00870
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CAP
Query on CAP

Download SDF File 
Download CCD File 
B, E, H, L
2-CARBOXYARABINITOL-1,5-DIPHOSPHATE
C6 H14 O13 P2
ITHCSGCUQDMYAI-ZMIZWQJLSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CAPKd: 0.00019 nM BINDINGMOAD
CAPKd: 0.00019 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.154 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 157.200α = 90.00
b = 157.200β = 90.00
c = 201.300γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data reduction
X-PLORmodel building
CCP4data scaling
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance