3C62

Tetrameric Cytochrome cb562 (H59/D62/H63/H73/A74/H77) Assembly Stabilized by Interprotein Zinc Coordination


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.273 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Metal-mediated self-assembly of protein superstructures: influence of secondary interactions on protein oligomerization and aggregation.

Salgado, E.N.Lewis, R.A.Faraone-Mennella, J.Tezcan, F.A.

(2008) J Am Chem Soc 130: 6082-6084

  • DOI: https://doi.org/10.1021/ja8012177
  • Primary Citation of Related Structures:  
    3C62, 3C63

  • PubMed Abstract: 

    We have previously demonstrated that non-self-associating protein building blocks can oligomerize to form discrete supramolecular assemblies under the control of metal coordination. We show here that secondary interactions (salt bridges and hydrogen bonds) can be critical in guiding the metal-induced self-assembly of proteins. Crystallographic and hydrodynamic measurements on appropriately engineered cytochrome cb562 variants pinpoint the importance of a single salt-bridging arginine side chain in determining whether the protein monomers form a discrete Zn-induced tetrameric complex or heterogeneous aggregates. The combined ability to direct PPIs through metal coordination and secondary interactions should provide the specificity required for the construction of complex protein superstructures and the selective control of cellular processes that involve protein-protein association reactions.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Soluble cytochrome b562
A, B, C, D
106Escherichia coliMutation(s): 7 
Gene Names: cybC
UniProt
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0ABE7
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B],
N [auth C],
Q [auth D]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B],
M [auth C],
O [auth D]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
F [auth A],
I [auth B],
J [auth B],
K [auth B],
P [auth D]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.273 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.968α = 90
b = 90.133β = 109.64
c = 49.357γ = 90
Software Package:
Software NamePurpose
SAINTdata scaling
MOLREPphasing
CNSrefinement
PDB_EXTRACTdata extraction
APEXdata collection
SAINTdata reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-05-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.2: 2018-03-07
    Changes: Data collection
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-08-30
    Changes: Data collection, Refinement description