4R3E

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.172 

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.,Sect.D 70: 3110-3123

  • DOI: 10.1107/S1399004714021695
  • Primary Citation of Related Structures:  

  • 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. ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peptidyl-prolyl cis-trans isomerase CWC27 homolog
A
180Homo sapiensMutation(s): 0 
Gene Names: CWC27 (SDCCAG10)
Find proteins for Q6UX04 (Homo sapiens)
Go to Gene View: CWC27
Go to UniProtKB:  Q6UX04
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.172 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 85.860α = 90.00
b = 85.860β = 90.00
c = 55.020γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
REFMACrefinement
PHASERphasing
MAR345dtbdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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