2CJ8

Crystal Structure of a Cell Wall Invertase Inhibitor from Tobacco (pH 9.5)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.202 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Multiple Crystal Forms of the Cell-Wall Invertase Inhibitor from Tobacco Support High Conformational Rigidity Over a Broad Ph-Range

Hothorn, M.Scheffzek, K.

(2006) Acta Crystallogr D Biol Crystallogr 62: 665

  • DOI: 10.1107/S0907444906011693
  • Primary Citation of Related Structures:  
    2CJ8, 2CJ7, 2CJ6, 2CJ5, 2CJ4

  • PubMed Abstract: 
  • Plant acid invertases catalyse the breakdown of sucrose. Their activity is tightly regulated through interaction with specific protein inhibitors. The complex between the cell-wall invertase inhibitor Nt-CIF and its target enzyme is stable only at acidic pH, as found in the plant cell wall ...

    Plant acid invertases catalyse the breakdown of sucrose. Their activity is tightly regulated through interaction with specific protein inhibitors. The complex between the cell-wall invertase inhibitor Nt-CIF and its target enzyme is stable only at acidic pH, as found in the plant cell wall. Since the pH in this compartment can be modulated between pH 4 and 6 in planta, the rapid dissociation of the inhibitor-enzyme complex at neutral pH may represent a regulatory event. Here, it is analyzed whether the inhibitory component undergoes structural rearrangements upon changes in the pH environment. Six crystal forms grown at pH 4.6-9.5 and diffracting up to 1.63 Angstrom indicate only small structural changes in CIF. This suggests that complex dissociation at neutral pH is mediated either by rearrangements in the enzyme or by a complex pattern of surface charges in the inhibitor-enzyme binding interface.


    Organizational Affiliation

    European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INVERTASE INHIBITORA, B150Nicotiana tabacumMutation(s): 0 
Gene Names: LOC107808322
UniProt
Find proteins for O49908 (Nicotiana tabacum)
Explore O49908 
Go to UniProtKB:  O49908
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download Ideal Coordinates CCD File 
C [auth A] , D [auth A] , E [auth A] , F [auth A] , G [auth A] , H [auth A] , I [auth A] , J [auth A] , 
C [auth A],  D [auth A],  E [auth A],  F [auth A],  G [auth A],  H [auth A],  I [auth A],  J [auth A],  K [auth A],  L [auth B],  M [auth B],  N [auth B],  O [auth B],  P [auth B],  Q [auth B],  R [auth B],  S [auth B],  T [auth B]
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.05α = 90
b = 50.22β = 90
c = 131.38γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection