2QAC

The closed MTIP-MyosinA-tail complex from the malaria parasite invasion machinery


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Closed MTIP-Myosin A-Tail Complex from the Malaria Parasite Invasion Machinery.

Bosch, J.Turley, S.Roach, C.M.Daly, T.M.Bergman, L.W.Hol, W.G.

(2007) J.Mol.Biol. 372: 77-88

  • DOI: 10.1016/j.jmb.2007.06.016

  • PubMed Abstract: 
  • The Myosin A-tail interacting protein (MTIP) of the malaria parasite links the actomyosin motor of the host cell invasion machinery to its inner membrane complex. We report here that at neutral pH Plasmodium falciparum MTIP in complex with Myosin A a ...

    The Myosin A-tail interacting protein (MTIP) of the malaria parasite links the actomyosin motor of the host cell invasion machinery to its inner membrane complex. We report here that at neutral pH Plasmodium falciparum MTIP in complex with Myosin A adopts a compact conformation, with its two domains completely surrounding the Myosin A-tail helix, dramatically different from previously observed extended MTIP structures. Crystallographic and mutagenesis studies show that H810 and K813 of Myosin A are key players in the formation of the compact MTIP:Myosin A complex. Only the unprotonated state of Myosin A-H810 is compatible with the compact complex. Most surprisingly, every side-chain atom of Myosin A-K813 is engaged in contacts with MTIP. While this side-chain was previously considered to prevent a compact conformation of MTIP with Myosin A, it actually appears to be essential for the formation of the compact complex. The hydrophobic pockets and adaptability seen in the available series of MTIP structures bodes well for the discovery of inhibitors of cell invasion by malaria parasites.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myosin A tail domain interacting protein MTIP
A
146Plasmodium falciparumMutation(s): 0 
Find proteins for Q8I4W8 (Plasmodium falciparum)
Go to UniProtKB:  Q8I4W8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Myosin-A
T
15Plasmodium yoelii yoeliiMutation(s): 0 
Find proteins for Q7RQ71 (Plasmodium yoelii yoelii)
Go to UniProtKB:  Q7RQ71
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SAC
Query on SAC
T
L-PEPTIDE LINKINGC5 H9 N O4SER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 37.217α = 90.00
b = 54.120β = 90.00
c = 76.326γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SHELXSphasing
ADSCdata collection
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-26
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Source and taxonomy, Version format compliance