Biological Assembly 1  

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Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 46863.42 
• Atom Count: 2562 
• Residue Count: 414 
• Unique protein chains: 1

4E98

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

• DOI: 10.2210/pdb4E98/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Cryptosporidium parvum (strain Iowa II)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2012-03-20 Released: 2012-04-11 
• Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID), Buchko, G.W., Robinson, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.247 
• R-Value Work: 0.198 

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 F Struct Biol Commun 71: 522-530

• PubMed: 25945704 
• DOI: 10.1107/S2053230X14028210


• 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. 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.

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Organizational Affiliation: 

Seattle Structural Genomics Center for Infectious Disease, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CutA1 divalent ion tolerance protein	A, B, C	138	Cryptosporidium parvum (strain Iowa II)	Mutation(s): 0
Find proteins for Q5CX58 (Cryptosporidium parvum (strain Iowa II)) Go to UniProtKB:  Q5CX58

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CL	A, B, C	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.247 
• R-Value Work: 0.198 
• Space Group: C 1 2 1
• Diffraction Data DOI: 
  10.18430/M34E98 Protein Diffraction

Unit Cell:

Length (Å)	Angle (°)
a = 94.460	α = 90.00
b = 55.590	β = 108.21
c = 67.290	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
REFMAC	refinement
CBASS	data collection
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-03-20 
• Released Date: 2012-04-11 
• Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID), Buchko, G.W., Robinson, H.

Revision History 

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