1U0O

The mouse von Willebrand Factor A1-botrocetin complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The snake venom protein botrocetin acts as a biological brace to promote dysfunctional platelet aggregation

Fukuda, K.Doggett, T.Laurenzi, I.J.Liddington, R.C.Diacovo, T.G.

(2005) Nat Struct Mol Biol 12: 152-159

  • DOI: 10.1038/nsmb892
  • Primary Citation of Related Structures:  
    1U0O, 1U0N

  • PubMed Abstract: 
  • Botrocetin is a snake venom protein that enhances the affinity of the A1 domain of plasma von Willebrand factor (vWF) for the platelet receptor glycoprotein Ibalpha (GPIbalpha), an event that contributes to bleeding and host death. Here we describe a ...

    Botrocetin is a snake venom protein that enhances the affinity of the A1 domain of plasma von Willebrand factor (vWF) for the platelet receptor glycoprotein Ibalpha (GPIbalpha), an event that contributes to bleeding and host death. Here we describe a kinetic and crystallographic analysis of this interaction that reveals a novel mechanism of affinity enhancement. Using high-temporal-resolution microscopy, we show that botrocetin decreases the GPIbalpha off-rate two-fold in both human and mouse complexes without affecting the on-rate. The key to this behavior is that, upon binding of GPIbalpha to vWF-A1, botrocetin prebound to vWF-A1 makes no contacts initially with GPIbalpha, but subsequently slides around the A1 surface to form a new interface. This two-step mechanism and flexible coupling may prevent adverse alterations in on-rate of GPIbalpha for vWF-A1, and permit adaptation to structural differences in GPIbalpha and vWF in several prey species.


    Organizational Affiliation

    Infectious and Inflammatory Disease Center, The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, California 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BotrocetinA133Bothrops jararacaMutation(s): 0 
Find proteins for P22029 (Bothrops jararaca)
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Go to UniProtKB:  P22029
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BotrocetinB125Bothrops jararacaMutation(s): 0 
Find proteins for P22030 (Bothrops jararaca)
Explore P22030 
Go to UniProtKB:  P22030
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
von Willebrand factorC208Mus musculusMutation(s): 0 
Gene Names: Vwf
Find proteins for Q8CIZ8 (Mus musculus)
Explore Q8CIZ8 
Go to UniProtKB:  Q8CIZ8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.338α = 90
b = 73.66β = 90
c = 114.424γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-04-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance