4E98

Crystal structure of possible CutA1 divalent ion tolerance protein from Cryptosporidium parvum Iowa II

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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This is version 1.3 of the entry. See complete history. 


Literature

Structure of a CutA1 divalent-cation tolerance protein from Cryptosporidium parvum, the protozoal parasite responsible for cryptosporidiosis.

Buchko, G.W., Abendroth, J., Clifton, M.C., Robinson, H., Zhang, Y., Hewitt, S.N., Staker, B.L., Edwards, T.E., Van Voorhis, W.C., Myler, P.J.

(2015) Acta Crystallogr Sect F Struct Biol Cryst Commun 71: 522-530

  • DOI: 10.1107/S2053230X14028210
  • Primary Citation of Related Structures:  
    4E98

  • PubMed Abstract: 

    • Cryptosporidiosis is an infectious disease caused by protozoan parasites of the Cryptosporidium genus. Infection is associated with mild to severe diarrhea that usually resolves spontaneously in healthy human adults, but may lead to severe complications in young children and in immunocompromised patients ...

    Cryptosporidiosis is an infectious disease caused by protozoan parasites of the Cryptosporidium genus. Infection is associated with mild to severe diarrhea that usually resolves spontaneously in healthy human adults, but may lead to severe complications in young children and in immunocompromised patients. The genome of C. parvum contains a gene, CUTA_CRYPI, that may play a role in regulating the intracellular concentration of copper, which is a toxic element in excess. Here, the crystal structure of this CutA1 protein, Cp-CutA1, is reported at 2.0 Å resolution. As observed for other CutA1 structures, the 117-residue protein is a trimer with a core ferrodoxin-like fold. Circular dichroism spectroscopy shows little, in any, unfolding of Cp-CutA1 up to 353 K. This robustness is corroborated by (1)H-(15)N HSQC spectra at 333 K, which are characteristic of a folded protein, suggesting that NMR spectroscopy may be a useful tool to further probe the function of the CutA1 proteins. While robust, Cp-CutA1 is not as stable as the homologous protein from a hyperthermophile, perhaps owing to a wide β-bulge in β2 that protrudes Pro48 and Ser49 outside the β-sheet.

    Organizational Affiliation: 

    Seattle Structural Genomics Center for Infectious Disease, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CutA1 divalent ion tolerance proteinA, B, C138Cryptosporidium parvum Iowa IIMutation(s): 0 
Gene Names: cgd6_2410
UniProt
Find proteins for Q5CX58 (Cryptosporidium parvum (strain Iowa II))
Explore Q5CX58 
Go to UniProtKB:  Q5CX58
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5CX58
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL
Download Ideal Coordinates CCD File 
D [auth A],
E [auth B],
F [auth C]		CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.46α = 90
b = 55.59β = 108.21
c = 67.29γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-11
    Type: Initial release
  • Version 1.1: 2012-04-18
    Changes: Other
  • Version 1.2: 2015-05-06
    Changes: Database references
  • Version 1.3: 2015-06-03
    Changes: Database references