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 

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


  • 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 i ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KP4 TOXIN
A, B
105Ustilago maydis P4 virusGene Names: M2A
Find proteins for Q90121 (Ustilago maydis P4 virus)
Go to UniProtKB:  Q90121
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 26.140α = 90.00
b = 63.760β = 92.20
c = 53.620γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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