1U96

Solution Structure of Yeast Cox17 with Copper Bound


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 20 
  • Selection Criteria: lowest retraint energies, restraint violations, and RMS deviations from ideal covalent geometries 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Yeast cox17 solution structure and Copper(I) binding.

Abajian, C.Yatsunyk, L.A.Ramirez, B.E.Rosenzweig, A.C.

(2004) J Biol Chem 279: 53584-53592

  • DOI: 10.1074/jbc.M408099200
  • Primary Citation of Related Structures:  
    1U96, 1U97

  • PubMed Abstract: 
  • Cox17 is a 69-residue cysteine-rich, copper-binding protein that has been implicated in the delivery of copper to the Cu(A) and Cu(B) centers of cytochrome c oxidase via the copper-binding proteins Sco1 and Cox11, respectively. According to isothermal titration calorimetry experiments, fully reduced Cox17 binds one Cu(I) ion with a K(a) of (6 ...

    Cox17 is a 69-residue cysteine-rich, copper-binding protein that has been implicated in the delivery of copper to the Cu(A) and Cu(B) centers of cytochrome c oxidase via the copper-binding proteins Sco1 and Cox11, respectively. According to isothermal titration calorimetry experiments, fully reduced Cox17 binds one Cu(I) ion with a K(a) of (6.15 +/- 5.83) x 10(6) M(-1). The solution structures of both apo and Cu(I)-loaded Cox17 reveal two alpha helices preceded by an extensive, unstructured N-terminal region. This region is reminiscent of intrinsically unfolded proteins. The two structures are very similar overall with residues in the copper-binding region becoming more ordered in Cu(I)-loaded Cox17. Based on the NMR data, the Cu(I) ion has been modeled as two-coordinate with ligation by conserved residues Cys(23) and Cys(26). This site is similar to those observed for the Atx1 family of copper chaperones and is consistent with reported mutagenesis studies. A number of conserved, positively charged residues may interact with complementary surfaces on Sco1 and Cox11, facilitating docking and copper transfer. Taken together, these data suggest that Cox17 is not only well suited to a copper chaperone function but is specifically designed to interact with two different target proteins.


    Organizational Affiliation

    Department of Biochemistry, Northwestern University, Evanston, IL 60208, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase copper chaperoneA69Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: COX17
UniProt
Find proteins for Q12287 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12287 
Go to UniProtKB:  Q12287
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU1
Query on CU1

Download Ideal Coordinates CCD File 
B [auth A]COPPER (I) ION
Cu
VMQMZMRVKUZKQL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 80 
  • Conformers Submitted: 20 
  • Selection Criteria: lowest retraint energies, restraint violations, and RMS deviations from ideal covalent geometries 
  • OLDERADO: 1U96 Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-10-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-12-20
    Changes: Database references, Derived calculations