1J6Y

Solution structure of Pin1At from Arabidopsis thaliana


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with acceptable covalent geometry,structures with the least restraint violations,structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution Structure of the Single-domain Prolyl Cis/Trans Isomerase PIN1At from Arabidopsis thaliana

Landrieu, I.Wieruszeski, J.M.Wintjens, R.Inze, D.Lippens, G.

(2002) J.Mol.Biol. 320: 321-332

  • DOI: 10.1016/S0022-2836(02)00429-1

  • PubMed Abstract: 
  • The 119-amino acid residue prolyl cis/trans isomerase from Arabidopsis thaliana (PIN1At) is similar to the catalytic domain of the human hPIN1. However, PIN1At lacks the N-terminal WW domain that appears to be essential for the hPIN1 function. Here, ...

    The 119-amino acid residue prolyl cis/trans isomerase from Arabidopsis thaliana (PIN1At) is similar to the catalytic domain of the human hPIN1. However, PIN1At lacks the N-terminal WW domain that appears to be essential for the hPIN1 function. Here, the solution structure of PIN1At was determined by three-dimensional nuclear magnetic resonance spectroscopy. The PIN1At fold could be superimposed on that of the catalytic domain of hPIN1 and had a 19 residue flexible loop located between strand beta1 and helix alpha1. The dynamical features of this beta1/alpha1-loop, which are characteristic for a region involved in protein-protein interactions, led to exchange broadening in the NMR spectra. When sodium sulfate salt was added to the protein sample, the beta1/alpha1 loop was stabilized and, hence, a complete backbone resonance assignment was obtained. Previously, with a phospho-Cdc25 peptide as substrate, PIN1At had been shown to catalyze the phosphoserine/phosphothreonine prolyl cis/trans isomerization specifically. To map the catalytic site of PIN1At, the phospho-Cdc25 peptide or sodium sulfate salt was added in excess to the protein and chemical shift changes in the backbone amide protons were monitored in the (1)H(N)-(15)N heteronuclear single quantum coherence spectrum. The peptide caused perturbations in the loops between helix alpha4 and strand beta3, between strands beta3 and beta4, in the alpha3 helix, and in the beta1/alpha1 loop. The amide groups of the residues Arg21 and Arg22 showed large chemical shift perturbations upon phospho-Cdc25 peptide or sulfate addition. We conclude that this basic cluster formed by Arg21 and Arg22, both located in the beta1/alpha1 loop, is homologous to that found in the hPIN1 crystal structure (Arg68 and Arg69), which also is involved in sulfate ion binding. We showed that the sulfate group competed for the interaction between PIN1At and the phospho-Cdc25 peptide. In the absence of the WW domain, three hydrophobic residues (Ile33, Ile34, and Leu35) located in the long flexible loop and specific for the plant PIN-type peptidyl prolyl cis/trans isomerases (PPIases) could be an additional interaction site in PIN1At. However, phospho-peptide addition did not affect the resonances of these residues significantly. Electrostatic potential calculations revealed a negatively charged area not found in hPIN1 on the PIN1At molecular surface, which corresponds to the surface shielded by the WW domain in hPIN1. Based on our experimental results and the molecular specificities of the PIN1At enzyme, functional implications of the lack of WW domains in this plant PIN-type PPIase will be discussed.


    Related Citations: 
    • Letter to the editor : sequence-specific 1H, 13C and 15N chemical shift backbone NMR assigment and secondary structure of the Arabidopsis thaliana PIN1At protein
      Landrieu, I.,Wieruszeski, J.M.,Odaert, B.,Inze, D.,Grzesiek, S.,Lippens, G.
      (2000) J.Biomol.NMR 17: 271
    • The Arabidopsis thaliana PIN1At gene encodes a single-domain phosphorylation-dependent peptidyl prolyl cis/trans isomerase
      Landrieu, I.,De Veylder, L.,Fruchart, J.-S.,Odaert, B.,Casteels, P.,Portetelle, D.,Van Montagu, M.,Inze, D.,Lippens, G.
      (2000) J.Biol.Chem. 275: 10577


    Organizational Affiliation

    UMR 8525 CNRS-Lille2, Institut de Biologie de Lille/Pasteur Institute of Lille, 59019 Lille Cedex, France. isabelle.landrieu@pasteur-lille.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
peptidyl-prolyl cis-trans isomerase
A
139Arabidopsis thalianaGene Names: PIN1
EC: 5.2.1.8
Find proteins for Q9SL42 (Arabidopsis thaliana)
Go to Gene View: PIN1
Go to UniProtKB:  Q9SL42
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with acceptable covalent geometry,structures with the least restraint violations,structures with the lowest energy 
  • Olderado: 1J6Y Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-08-07
    Type: Initial release
  • Version 1.1: 2008-04-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance