Saposin-like protein Na-SLP-1

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report

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Insights into the membrane interactions of the saposin-like proteins Na-SLP-1 and Ac-SLP-1 from human and dog hookworm.

Willis, C.Wang, C.K.Osman, A.Simon, A.Pickering, D.Mulvenna, J.Riboldi-Tunicliffe, A.Jones, M.K.Loukas, A.Hofmann, A.

(2011) PLoS One 6: e25369-e25369

  • DOI: https://doi.org/10.1371/journal.pone.0025369
  • Primary Citation of Related Structures:  
    3S63, 3S64

  • PubMed Abstract: 

    Saposin-like proteins (SAPLIPs) from soil-transmitted helminths play pivotal roles in host-pathogen interactions and have a high potential as targets for vaccination against parasitic diseases. We have identified two non-orthologous SAPLIPs from human and dog hookworm, Na-SLP-1 and Ac-SLP-1, and solved their three-dimensional crystal structures. Both proteins share the property of membrane binding as monitored by liposome co-pelleting assays and monolayer adsorption. Neither SAPLIP displayed any significant haemolytic or bactericidal activity. Based on the structural information, as well as the results from monolayer adsorption, we propose models of membrane interactions for both SAPLIPs. Initial membrane contact of the monomeric Na-SLP-1 is most likely by electrostatic interactions between the membrane surface and a prominent basic surface patch. In case of the dimeric Ac-SLP-1, membrane interactions are most likely initiated by a unique tryptophan residue that has previously been implicated in membrane interactions in other SAPLIPs.

  • Organizational Affiliation

    Parasite Cell Biology, Queensland Institute of Medical Research, Herston, Queensland, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Saposin-like protein
A, B
117Necator americanusMutation(s): 0 
Find proteins for H2L2M0 (Necator americanus)
Explore H2L2M0 
Go to UniProtKB:  H2L2M0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupH2L2M0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.433α = 90
b = 85.433β = 90
c = 113.452γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-18
    Type: Initial release