3NWV

Human cytochrome c G41S

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.176 

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Ligand Structure Quality Assessment 


This is version 2.0 of the entry. See complete history. 


Literature

The Proapoptotic G41S Mutation to Human Cytochrome c Alters the Heme Electronic Structure and Increases the Electron Self-Exchange Rate.

Liptak, M.D., Fagerlund, R.D., Ledgerwood, E.C., Wilbanks, S.M., Bren, K.L.

(2011) J Am Chem Soc 133: 1153-1155

  • DOI: 10.1021/ja106328k
  • Primary Citation of Related Structures:  
    3NWV

  • PubMed Abstract: 

    • The naturally occurring G41S mutation to human (Hs) cytochrome (cyt) c enhances apoptotic activity based upon previous in vitro and in vivo studies, but the molecular mechanism underlying this enhancement remains unknown. Here, X-ray crystallography, nuclear magnetic resonance (NMR) spectroscopy, and density functional theory (DFT) calculations have been used to identify the structural and electronic differences between wild-type (WT) and G41S Hs cyt c ...

    The naturally occurring G41S mutation to human (Hs) cytochrome (cyt) c enhances apoptotic activity based upon previous in vitro and in vivo studies, but the molecular mechanism underlying this enhancement remains unknown. Here, X-ray crystallography, nuclear magnetic resonance (NMR) spectroscopy, and density functional theory (DFT) calculations have been used to identify the structural and electronic differences between wild-type (WT) and G41S Hs cyt c. S41 is part of the hydrogen bonding network for propionate 7 of heme pyrrole ring A in the X-ray structure of G41S Hs cyt c and, compared to WT, G41S Hs cyt c has increased spin density on pyrrole ring C and a faster electron self-exchange rate. DFT calculations illustrate an electronic mechanism where structural changes near ring A can result in electronic changes at ring C. Since ring C is part of the solvent-exposed protein surface, we propose that this heme electronic structure change may ultimately be responsible for the enhanced proapoptotic activity of G41S Hs cyt c.

    Related Citations: 
    • A mutation of human cytochrome c enhances the intrinsic apoptotic pathway but causes only thrombocytopenia.
      Morison, I.M., Cramer Borde, E.M., Cheesman, E.J., Cheong, P.L., Holyoake, A.J., Fichelson, S., Weeks, R.J., Lo, A., Davies, S.M., Wilbanks, S.M., Fagerlund, R.D., Ludgate, M.W., da Silva Tatley, F.M., Coker, M.S., Bockett, N.A., Hughes, G., Pippig, D.A., Smith, M.P., Capron, C., Ledgerwood, E.C.
      (2008) Nat Genet 40: 387
    Organizational Affiliation: 

    Department of Chemistry, University of Rochester, Rochester, New York 14627, United States.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome cA, B, C, D104Homo sapiensMutation(s): 1 
Gene Names: CYC, CYC1, CYCS
UniProt & NIH Common Fund Data Resources
Find proteins for P99999 (Homo sapiens)
Explore P99999 
Go to UniProtKB:  P99999
PHAROS:  P99999
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP99999
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.176 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 184.632α = 90
b = 62.693β = 89.78
c = 35.47γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
PHASERphasing
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2019-10-02
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary