4MZK

Crystal Structure of MTIP from Plasmodium falciparum in complex with pGly[807,811], a stapled myoA tail peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structures of Stapled and Hydrogen Bond Surrogate Peptides Targeting a Fully Buried Protein-Helix Interaction.

Douse, C.H.Maas, S.J.Thomas, J.C.Garnett, J.A.Sun, Y.Cota, E.Tate, E.W.

(2014) Acs Chem.Biol. 8: 506-512

  • DOI: 10.1021/cb500271c
  • Primary Citation of Related Structures:  4MZJ, 4MZL

  • PubMed Abstract: 
  • Constrained α-helical peptides are an exciting class of molecule designed to disrupt protein-protein interactions (PPIs) at a surface-exposed helix binding site. Complexes that engage more than one helical face account for over a third of structurall ...

    Constrained α-helical peptides are an exciting class of molecule designed to disrupt protein-protein interactions (PPIs) at a surface-exposed helix binding site. Complexes that engage more than one helical face account for over a third of structurally characterized helix PPIs, including several examples where the helix is fully buried. However, no constrained peptides have been reported that have targeted this class of interaction. We report the design of stapled and hydrogen bond surrogate (HBS) peptides mimicking the helical tail of the malaria parasite invasion motor myosin (myoA), which presents polar and hydrophobic functionality on all three faces in binding its partner, myoA tail interacting protein (MTIP), with high affinity. The first structures of these different constrained peptides bound to the same target are reported, enabling a direct comparison between these constraints and between staples based on monosubstituted pentenyl glycine (pGly) and disubstituted pentenyl alanine (pAla). Importantly, installation of these constraints does not disrupt native interactions in the buried site, so the affinity of the wild-type peptide is maintained.


    Organizational Affiliation

    Department of Chemistry, ‡Centre for Structural Biology, Department of Life Sciences, and §Institute of Chemical Biology, Imperial College London , London SW7 2AZ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myosin A tail domain interacting protein
A
145Plasmodium falciparum (isolate 3D7)Gene Names: MTIP
Find proteins for Q8I4W8 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q8I4W8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
pGly[807,811], a stapled myoA tail peptide
T
19Plasmodium falciparumN/A
Find proteins for Q8IDR3 (Plasmodium falciparum)
Go to UniProtKB:  Q8IDR3
Small Molecules
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_001187
Query on PRD_001187
TpGly[807,811], a stapled myoA tail peptidePeptide-like / Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 37.980α = 90.00
b = 55.030β = 90.00
c = 75.830γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHENIXrefinement
Adxvdata processing
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-06
    Type: Initial release
  • Version 1.1: 2014-08-20
    Type: Database references
  • Version 1.2: 2014-09-03
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description