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 
  • R-Value Observed: 0.222 

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:  
    2NPM, 2O8P, 3EFZ

  • 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 with a uniquely wide pocket and a disoriented RRY triad potentially incapable of binding phosphopeptides ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14-3-3 domain containing proteinA,
C [auth B]
260Cryptosporidium parvumMutation(s): 0 
Gene Names: cgd3_1290
UniProt
Find proteins for Q5CUW0 (Cryptosporidium parvum (strain Iowa II))
Explore Q5CUW0 
Go to UniProtKB:  Q5CUW0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5CUW0
Protein Feature View
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CONSENSUS PEPTIDE FOR 14-3-3 PROTEINSB [auth X],
D [auth Y]
6N/AMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B [auth X],
D [auth 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 
  • R-Value Observed: 0.222 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.125α = 90
b = 104.125β = 90
c = 148.877γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
JDirectordata collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
Cootmodel building

Structure Validation

View Full Validation Report




Entry History 

Revision History  (Full details and data files)

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