2VSG

A Structural Motif in the Variant Surface Glycoproteins of Trypanosoma Brucei


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A structural motif in the variant surface glycoproteins of Trypanosoma brucei.

Blum, M.L.Down, J.A.Gurnett, A.M.Carrington, M.Turner, M.J.Wiley, D.C.

(1993) Nature 362: 603-609

  • DOI: 10.1038/362603a0

  • PubMed Abstract: 
  • The variable domain of the trypanosome variant surface glycoprotein (VSG) ILTat 1.24 has been shown by X-ray crystallography to resemble closely the structures of VSG MITat 1.2, despite their low sequence similarity. Specific structural features of t ...

    The variable domain of the trypanosome variant surface glycoprotein (VSG) ILTat 1.24 has been shown by X-ray crystallography to resemble closely the structures of VSG MITat 1.2, despite their low sequence similarity. Specific structural features of these VSGs, including substitution of carbohydrate for an alpha-helix, can be found in other VSG sequences. Thus antigenic variation in trypanosomes is accomplished by sequence variation, not gross structural alteration; the extensive sequence differences among VSGs may be required for another reason, such as the avoidance of recognition by helper T cells. Additionally, VSG sequences are found to define families, within a VSG superfamily, which have evolved in the trypanosome genome.


    Related Citations: 
    • Crystallization of Amino-Terminal Domains and Domain Fragments of Variant Surface Glycoproteins from Trypanosoma Brucei Brucei
      Metcalf, P.,Down, J.A.,Turner, M.,Wiley, D.C.
      (1988) J.Biol.Chem. 263: 17030
    • Two Variant Surface Glycoproteins of Trypanosoma Brucei of Diffrent Sequence Classes Have Similar 6 Angstrom Resolution X-Ray Structures
      Metcalf, P.,Blum, M.,Freymann, D.,Turner, M.,Wiley, D.C.
      (1987) Nature 325: 84
    • The Structure of a Vsg Variable Domain from Trypanosoma Brucei at 2.7 A Resolution
      Blum, M.L.
      (1990) Thesis --: --


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, Massachusetts.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VARIANT SURFACE GLYCOPROTEIN ILTAT 1.24
A, B
358Trypanosoma brucei bruceiMutation(s): 0 
Find proteins for P26329 (Trypanosoma brucei brucei)
Go to UniProtKB:  P26329
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.100α = 90.00
b = 98.800β = 90.00
c = 172.900γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
ROTAVATAdata reduction
BUDDHAdata reduction
BRICOGNEmodel building
X-PLORrefinement
BUDDHAdata collection
ROTAVATAdata scaling
Agrovatadata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-25
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description