2BVU

D83R mutant of Asaris suum major sperm protein (MSP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Role of Filament-Packing Dynamics in Powering Amoeboid Cell Motility.

Miao, L.Vanderlinde, O.Liu, J.Grant, R.P.Wouterse, A.Shimabukuro, K.Philipse, A.Stewart, M.Roberts, T.M.

(2008) Proc Natl Acad Sci U S A 105: 5390

  • DOI: 10.1073/pnas.0708416105
  • Primary Citation of Related Structures:  
    2BVU

  • PubMed Abstract: 
  • Although several models have been proposed to account for how cytoskeleton polymerization drives protrusion in cell motility, the precise mechanism remains controversial. Here, we show that, in addition to force exerted directly against the membrane ...

    Although several models have been proposed to account for how cytoskeleton polymerization drives protrusion in cell motility, the precise mechanism remains controversial. Here, we show that, in addition to force exerted directly against the membrane by growing filaments, the way elongating filaments pack also contributes to protrusion by generating an expansion of the cytoskeleton gel. Tomography shows that filament packing in the major sperm protein (MSP) -based nematode sperm-motility machinery resembles that observed with rigid rods. Maximum rod-packing density decreases dramatically as the rods lengthen. Therefore, as filaments elongate, the cytoskeleton gel expands to accommodate their packing less densely. This volume expansion combines with polymerization to drive protrusion. Consistent with this hypothesis, an engineered MSP mutant that generates shorter filaments shows higher filament-packing density and slower movement.


    Organizational Affiliation

    Department of Biological Science and Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MAJOR SPERM PROTEIN, ISOFORM ALPHAA, B, C, D126Ascaris suumMutation(s): 1 
Find proteins for P27439 (Ascaris suum)
Explore P27439 
Go to UniProtKB:  P27439
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.805α = 90
b = 54.805β = 90
c = 453.14γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-25
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Refinement description