1KPT

STRUCTURE AND FUNCTION OF A VIRALLY ENCODED FUNGAL TOXIN FROM USTILAGO MAYDIS: A FUNGAL AND MAMMALIAN CALCIUM CHANNEL INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and function of a virally encoded fungal toxin from Ustilago maydis: a fungal and mammalian Ca2+ channel inhibitor.

Gu, F.Khimani, A.Rane, S.G.Flurkey, W.H.Bozarth, R.F.Smith, T.J.

(1995) Structure 3: 805-814

  • DOI: 10.1016/s0969-2126(01)00215-5
  • Primary Citation of Related Structures:  
    1KPT

  • PubMed Abstract: 
  • The P4 strain of the corn smut fungus, Ustilago maydis, secretes a fungal toxin, KP4, encoded by a fungal virus (UMV4) that persistently infects its cells. UMV4, unlike most other (non-fungal) viruses, does not spread to uninfected cells by release into the extracellular milieu during its normal life cycle and is thus dependent upon host survival for replication ...

    The P4 strain of the corn smut fungus, Ustilago maydis, secretes a fungal toxin, KP4, encoded by a fungal virus (UMV4) that persistently infects its cells. UMV4, unlike most other (non-fungal) viruses, does not spread to uninfected cells by release into the extracellular milieu during its normal life cycle and is thus dependent upon host survival for replication. In symbiosis with the host fungus, UMV4 encodes KP4 to kill other competitive strains of U. maydis, thereby promoting both host and virus survival. KP4 belongs to a family of fungal toxins and determining its structure should lead to a better understanding of the function and evolutionary origins of these toxins. Elucidation of the mechanism of toxin action could lead to new anti-fungal agents against human pathogens.


    Related Citations: 
    • The Characterization and Crystallization of a Virally Encoded Ustilago Maydis Kp4 Toxin
      Gu, F., Sullivan, T., Che, Z., Ganesa, C., Flurkey, W., Bozarth, R., Smith, T.
      (1994) J Mol Biol 243: 792

    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
KP4 TOXINA, B105Ustilago maydisMutation(s): 0 
UniProt
Find proteins for Q90121 (Ustilago maydis P4 virus)
Explore Q90121 
Go to UniProtKB:  Q90121
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 26.14α = 90
b = 63.76β = 92.2
c = 53.62γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 1995-06-06 
  • Released Date: 1995-10-31 
  • Deposition Author(s): Gu, F., Smith, T.

Revision History  (Full details and data files)

  • Version 1.0: 1995-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance