2NPM

crystal structure of Cryptosporidium parvum 14-3-3 protein in complex with peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Characterization of 14-3-3 proteins from Cryptosporidium parvum.

Brokx, S.J.Wernimont, A.K.Dong, A.Wasney, G.A.Lin, Y.H.Lew, J.Vedadi, M.Lee, W.H.Hui, R.

(2011) Plos One 6: e14827-e14827

  • DOI: 10.1371/journal.pone.0014827
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The parasite Cryptosporidium parvum has three 14-3-3 proteins: Cp14ε, Cp14a and Cp14b, with only Cp14ε similar to human 14-3-3 proteins in sequence, peptide-binding properties and structure. Structurally, Cp14a features the classical 14-3-3 dimer but ...

    The parasite Cryptosporidium parvum has three 14-3-3 proteins: Cp14ε, Cp14a and Cp14b, with only Cp14ε similar to human 14-3-3 proteins in sequence, peptide-binding properties and structure. Structurally, Cp14a features the classical 14-3-3 dimer but with a uniquely wide pocket and a disoriented RRY triad potentially incapable of binding phosphopeptides. The Cp14b protein deviates from the norm significantly: (i) In one subunit, the phosphorylated C-terminal tail is bound in the binding groove like a phosphopeptide. This supports our binding study indicating this protein was stabilized by a peptide mimicking its last six residues. (ii) The other subunit has eight helices instead of nine, with αA and αB forming a single helix and occluding the peptide-binding cleft. (iii) The protein forms a degenerate dimer with the two binding grooves divided and facing opposite directions. These features conspire to block and disrupt the bicameral substrate-binding pocket, suggesting a possible tripartite auto-regulation mechanism that has not been observed previously.


    Organizational Affiliation

    Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 domain containing protein
A, B
260Cryptosporidium parvum (strain Iowa II)Mutation(s): 0 
Find proteins for Q5CUW0 (Cryptosporidium parvum (strain Iowa II))
Go to UniProtKB:  Q5CUW0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CONSENSUS PEPTIDE FOR 14-3-3 PROTEINS
X, Y
6N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
X, Y
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.125α = 90.00
b = 104.125β = 90.00
c = 148.877γ = 90.00
Software Package:
Software NamePurpose
JDirectordata collection
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
Cootmodel building
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2006-11-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2012-02-22
    Type: Database references
  • Version 1.4: 2017-10-18
    Type: Refinement description