4YUJ

Multiconformer synchrotron model of CypA at 240 K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.126 

wwPDB Validation 3D Report Full Report


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Literature

Mapping the conformational landscape of a dynamic enzyme by multitemperature and XFEL crystallography.

Keedy, D.A.Kenner, L.R.Warkentin, M.Woldeyes, R.A.Hopkins, J.B.Thompson, M.C.Brewster, A.S.Van Benschoten, A.H.Baxter, E.L.Uervirojnangkoorn, M.McPhillips, S.E.Song, J.Alonso-Mori, R.Holton, J.M.Weis, W.I.Brunger, A.T.Soltis, S.M.Lemke, H.Gonzalez, A.Sauter, N.K.Cohen, A.E.van den Bedem, H.Thorne, R.E.Fraser, J.S.

(2015) Elife 4: --

  • DOI: 10.7554/eLife.07574
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Determining the interconverting conformations of dynamic proteins in atomic detail is a major challenge for structural biology. Conformational heterogeneity in the active site of the dynamic enzyme cyclophilin A (CypA) has been previously linked to i ...

    Determining the interconverting conformations of dynamic proteins in atomic detail is a major challenge for structural biology. Conformational heterogeneity in the active site of the dynamic enzyme cyclophilin A (CypA) has been previously linked to its catalytic function, but the extent to which the different conformations of these residues are correlated is unclear. Here we compare the conformational ensembles of CypA by multitemperature synchrotron crystallography and fixed-target X-ray free-electron laser (XFEL) crystallography. The diffraction-before-destruction nature of XFEL experiments provides a radiation-damage-free view of the functionally important alternative conformations of CypA, confirming earlier synchrotron-based results. We monitored the temperature dependences of these alternative conformations with eight synchrotron datasets spanning 100-310 K. Multiconformer models show that many alternative conformations in CypA are populated only at 240 K and above, yet others remain populated or become populated at 180 K and below. These results point to a complex evolution of conformational heterogeneity between 180--240 K that involves both thermal deactivation and solvent-driven arrest of protein motions in the crystal. The lack of a single shared conformational response to temperature within the dynamic active-site network provides evidence for a conformation shuffling model, in which exchange between rotamer states of a large aromatic ring in the middle of the network shifts the conformational ensemble for the other residues in the network. Together, our multitemperature analyses and XFEL data motivate a new generation of temperature- and time-resolved experiments to structurally characterize the dynamic underpinnings of protein function.


    Organizational Affiliation

    Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peptidyl-prolyl cis-trans isomerase A
A
165Homo sapiensMutation(s): 0 
Gene Names: PPIA (CYPA)
EC: 5.2.1.8
Find proteins for P62937 (Homo sapiens)
Go to Gene View: PPIA
Go to UniProtKB:  P62937
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.126 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.040α = 90.00
b = 53.220β = 90.00
c = 88.630γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History