GTPase domain of Septin 10 from Schistosoma mansoni in complex with GDP

Experimental Data Snapshot

  • Resolution: 1.93 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.185 

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This is version 1.4 of the entry. See complete history


Crystal Structure of a Schistosoma mansoni Septin Reveals the Phenomenon of Strand Slippage in Septins Dependent on the Nature of the Bound Nucleotide.

Zeraik, A.E.Pereira, H.M.Santos, Y.V.Brandao-Neto, J.Spoerner, M.Santos, M.S.Colnago, L.A.Garratt, R.C.Araujo, A.P.Demarco, R.

(2014) J Biol Chem 289: 7799-7811

  • DOI: https://doi.org/10.1074/jbc.M113.525352
  • Primary Citation of Related Structures:  
    4KV9, 4KVA

  • PubMed Abstract: 

    Septins are filament-forming GTP-binding proteins involved in important cellular events, such as cytokinesis, barrier formation, and membrane remodeling. Here, we present two crystal structures of the GTPase domain of a Schistosoma mansoni septin (SmSEPT10), one bound to GDP and the other to GTP. The structures have been solved at an unprecedented resolution for septins (1.93 and 2.1 Å, respectively), which has allowed for unambiguous structural assignment of regions previously poorly defined. Consequently, we provide a reliable model for functional interpretation and a solid foundation for future structural studies. Upon comparing the two complexes, we observe for the first time the phenomenon of a strand slippage in septins. Such slippage generates a front-back communication mechanism between the G and NC interfaces. These data provide a novel mechanistic framework for the influence of nucleotide binding to the GTPase domain, opening new possibilities for the study of the dynamics of septin filaments.

  • Organizational Affiliation

    From the Instituto de Física de São Carlos, Universidade de São Paulo, 13563-120 São Carlos, São Paulo, Brazil.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
412Schistosoma mansoniMutation(s): 0 
Gene Names: Septin 10Smp_029890
Find proteins for A0A3Q0KDV9 (Schistosoma mansoni)
Explore A0A3Q0KDV9 
Go to UniProtKB:  A0A3Q0KDV9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A3Q0KDV9
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
GDP Binding MOAD:  4KV9 Kd: 1.46e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.93 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.185 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.9α = 90
b = 45.05β = 112.17
c = 95.49γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
GDAdata collection

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-02-26
    Changes: Database references
  • Version 1.2: 2014-04-02
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Refinement description
  • Version 1.4: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description