1U75

Electron Transfer Complex between Horse Heart Cytochrome c and Zinc-Porphyrin Substituted Cytochrome c Peroxidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.273 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Electron transfer between cytochrome c and cytochome c peroxidase in single crystals.

Kang, S.A.Marjavaara, P.J.Crane, B.R.

(2004) J Am Chem Soc 126: 10836-10837

  • DOI: 10.1021/ja049230u
  • Primary Citation of Related Structures:  
    1U75, 1U74

  • PubMed Abstract: 
  • Cytochrome c (Cc) and cytochrome c peroxidase (CcP) form an important redox pair for understanding interprotein electron transfer (ET). Measurements of ET rates from photoexcited CcP substituted with Zn porphyrin to either yeast Fe(III)Cc or horse Fe(III)Cc in crystals reveal that the molecular associations found in the respective crystal structures determine solution reactivity ...

    Cytochrome c (Cc) and cytochrome c peroxidase (CcP) form an important redox pair for understanding interprotein electron transfer (ET). Measurements of ET rates from photoexcited CcP substituted with Zn porphyrin to either yeast Fe(III)Cc or horse Fe(III)Cc in crystals reveal that the molecular associations found in the respective crystal structures determine solution reactivity. Similar forward rates for yeast isozyme-1 Cc (yCc) and yCc homologue horse Cc (hCc), despite different orientations relative to CcP, suggest small-amplitude conformational gating of ET even in the crystalline state; faster back ET in the yCc compared to the hCc complex agrees with the relative coupling between redox sites predicted by the structures.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cytochrome c peroxidaseA, C296Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: Yeast
EC: 1.11.1.5
UniProt
Find proteins for P00431 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P00431 
Go to UniProtKB:  P00431
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome cB104Equus caballusMutation(s): 0 
Gene Names: CYCSCYC
UniProt
Find proteins for P00004 (Equus caballus)
Explore P00004 
Go to UniProtKB:  P00004
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZNH
Query on ZNH

Download Ideal Coordinates CCD File 
E [auth A], H [auth C]PROTOPORPHYRIN IX CONTAINING ZN
C34 H32 N4 O4 Zn
FUTVBRXUIKZACV-UMRYFLQFDI
 Ligand Interaction
HEC
Query on HEC

Download Ideal Coordinates CCD File 
F [auth B]HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
D [auth A], G [auth C]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.273 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.465α = 90
b = 104.465β = 90
c = 186.884γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 2.0: 2021-03-03
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary