4R3E

Structure of the spliceosomal peptidyl-prolyl cis-trans isomerase Cwc27 from Homo sapiens


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and evolution of the spliceosomal peptidyl-prolyl cis-trans isomerase Cwc27.

Ulrich, A.Wahl, M.C.

(2014) Acta Crystallogr D Biol Crystallogr 70: 3110-3123

  • DOI: 10.1107/S1399004714021695
  • Primary Citation of Related Structures:  
    4R3E, 4R3F

  • PubMed Abstract: 
  • Cwc27 is a spliceosomal cyclophilin-type peptidyl-prolyl cis-trans isomerase (PPIase). Here, the crystal structure of a relatively protease-resistant N-terminal fragment of human Cwc27 containing the PPIase domain was determined at 2.0 Å resolution. The fragment exhibits a C-terminal appendix and resides in a reduced state compared with the previous oxidized structure of a similar fragment ...

    Cwc27 is a spliceosomal cyclophilin-type peptidyl-prolyl cis-trans isomerase (PPIase). Here, the crystal structure of a relatively protease-resistant N-terminal fragment of human Cwc27 containing the PPIase domain was determined at 2.0 Å resolution. The fragment exhibits a C-terminal appendix and resides in a reduced state compared with the previous oxidized structure of a similar fragment. By combining multiple sequence alignments spanning the eukaryotic tree of life and secondary-structure prediction, Cwc27 proteins across the entire eukaryotic kingdom were identified. This analysis revealed the specific loss of a crucial active-site residue in higher eukaryotic Cwc27 proteins, suggesting that the protein evolved from a prolyl isomerase to a pure proline binder. Noting a fungus-specific insertion in the PPIase domain, the 1.3 Å resolution crystal structure of the PPIase domain of Cwc27 from Chaetomium thermophilum was also determined. Although structurally highly similar in the core domain, the C. thermophilum protein displayed a higher thermal stability than its human counterpart, presumably owing to the combined effect of several amino-acid exchanges that reduce the number of long side chains with strained conformations and create new intramolecular interactions, in particular increased hydrogen-bond networks.


    Organizational Affiliation

    Laboratory of Structural Biochemistry, Freie Universität Berlin, Takustrasse 6, 14195 Berlin, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase CWC27 homolog A180Homo sapiensMutation(s): 0 
Gene Names: CWC27SDCCAG10UNQ438/PRO871
EC: 5.2.1.8
Find proteins for Q6UX04 (Homo sapiens)
Explore Q6UX04 
Go to UniProtKB:  Q6UX04
NIH Common Fund Data Resources
PHAROS:  Q6UX04
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.86α = 90
b = 85.86β = 90
c = 55.02γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2014-08-15 
  • Released Date: 2014-11-19 
  • Deposition Author(s): Ulrich, A., Wahl, M.C.

Revision History  (Full details and data files)

  • Version 1.0: 2014-11-19
    Type: Initial release
  • Version 1.1: 2014-12-10
    Changes: Database references
  • Version 1.2: 2014-12-24
    Changes: Database references