4E3X

Crystal Structure of Mus musculus 1-pyrroline-5-carboxylate dehydrogenase cryoprotected in proline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.24 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Proline: Mother Nature's cryoprotectant applied to protein crystallography.

Pemberton, T.A.Still, B.R.Christensen, E.M.Singh, H.Srivastava, D.Tanner, J.J.

(2012) Acta Crystallogr.,Sect.D 68: 1010-1018

  • DOI: 10.1107/S0907444912019580
  • Primary Citation of Related Structures:  4E3U, 4E3V, 4E3W

  • PubMed Abstract: 
  • L-Proline is one of Mother Nature's cryoprotectants. Plants and yeast accumulate proline under freeze-induced stress and the use of proline in the cryopreservation of biological samples is well established. Here, it is shown that L-proline is also a ...

    L-Proline is one of Mother Nature's cryoprotectants. Plants and yeast accumulate proline under freeze-induced stress and the use of proline in the cryopreservation of biological samples is well established. Here, it is shown that L-proline is also a useful cryoprotectant for protein crystallography. Proline was used to prepare crystals of lysozyme, xylose isomerase, histidine acid phosphatase and 1-pyrroline-5-carboxylate dehydrogenase for low-temperature data collection. The crystallization solutions in these test cases included the commonly used precipitants ammonium sulfate, sodium chloride and polyethylene glycol and spanned the pH range 4.6-8.5. Thus, proline is compatible with typical protein-crystallization formulations. The proline concentration needed for cryoprotection of these crystals is in the range 2.0-3.0 M. Complete data sets were collected from the proline-protected crystals. Proline performed as well as traditional cryoprotectants based on the diffraction resolution and data-quality statistics. The structures were refined to assess the binding of proline to these proteins. As observed with traditional cryoprotectants such as glycerol and ethylene glycol, the electron-density maps clearly showed the presence of proline molecules bound to the protein. In two cases, histidine acid phosphatase and 1-pyrroline-5-carboxylate dehydrogenase, proline binds in the active site. It is concluded that L-proline is an effective cryoprotectant for protein crystallography.


    Organizational Affiliation

    Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Delta-1-pyrroline-5-carboxylate dehydrogenase, mitochondrial
A, B
563Mus musculusGene Names: Aldh4a1
EC: 1.2.1.88
Find proteins for Q8CHT0 (Mus musculus)
Go to UniProtKB:  Q8CHT0
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
16P
Query on 16P

Download SDF File 
Download CCD File 
A
3,6,9,12,15,18-HEXAOXAICOSANE
C14 H30 O6
IXFAFGFZFQHRLB-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download SDF File 
Download CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
PRO
Query on PRO

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Download CCD File 
A, B
PROLINE
C5 H9 N O2
ONIBWKKTOPOVIA-BYPYZUCNSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.24 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.155 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 84.980α = 90.00
b = 93.878β = 90.00
c = 132.406γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHENIXrefinement
XDSdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-25
    Type: Initial release
  • Version 1.1: 2012-08-29
    Type: Database references