1CRC

CYTOCHROME C AT LOW IONIC STRENGTH

• PDB DOI: https://doi.org/10.2210/pdb1CRC/pdb

• Classification: MITOCHONDRIAL ELECTRON TRANSPORT
• Organism(s): Equus caballus
• Mutation(s): No 


• Deposited: 1995-03-22 Released: 1996-03-08 
• Deposition Author(s): Sanishvili, R., Volz, K.W., Westbrook, E.M., Margoliash, E.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.08 Å
• R-Value Observed: 0.177 

Literature

The low ionic strength crystal structure of horse cytochrome c at 2.1 A resolution and comparison with its high ionic strength counterpart.

Sanishvili, R., Volz, K.W., Westbrook, E.M., Margoliash, E.

(1995) Structure 3: 707-716

• PubMed: 8591047 
• DOI: https://doi.org/10.1016/s0969-2126(01)00205-2
• Primary Citation of Related Structures:  
  1CRC


• PubMed Abstract: 
  

  Cytochrome c is an integral part of the mitochondrial respiratory chain. It is confined to the intermembrane space of mitochondria, and has the function of transferring electrons between its redox partners. Solution studies of cytochrome c indicate that the conformation of the molecule is sensitive to the ionic strength of the medium.

---

Organizational Affiliation: 

Department of Biological Sciences, University of Illinois at Chicago 60607, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24.74 kDa 
• Atom Count: 1,934 
• Modelled Residue Count: 210 
• Deposited Residue Count: 210 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYTOCHROME C	A, B	105	Equus caballus	Mutation(s): 0
UniProt
Find proteins for P00004 (Equus caballus) Explore P00004  Go to UniProtKB:  P00004

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEC	C [auth A], D [auth B]	HEME C C34 H34 Fe N4 O4 HXQIYSLZKNYNMH-LJNAALQVSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.08 Å
• R-Value Observed: 0.177 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.62	α = 90
b = 105.01	β = 90
c = 35.11	γ = 90

Software Package:

Software Name	Purpose
PROFFT	refinement
PROLSQ	refinement
XENGEN	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-03-08 
Deposition Author(s): Sanishvili, R., Volz, K.W., Westbrook, E.M., Margoliash, E.

Revision History  

• Version 1.0: 1996-03-08
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2021-03-10
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Other, Structure summary