Robo1 Ig1 to 4 crystal form 1

Experimental Data Snapshot

  • Resolution: 3.03 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.201 

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This is version 1.4 of the entry. See complete history


Robo1 Forms a Compact Dimer-of-Dimers Assembly.

Aleksandrova, N.Gutsche, I.Kandiah, E.Avilov, S.V.Petoukhov, M.V.Seiradake, E.McCarthy, A.A.

(2018) Structure 26: 320-328.e4

  • DOI: https://doi.org/10.1016/j.str.2017.12.003
  • Primary Citation of Related Structures:  
    5O5G, 5O5I, 5OPE

  • PubMed Abstract: 

    Roundabout (Robo) receptors provide an essential repulsive cue in neuronal development following Slit ligand binding. This important signaling pathway can also be hijacked in numerous cancers, making Slit-Robo an attractive therapeutic target. However, little is known about how Slit binding mediates Robo activation. Here we present the crystal structure of Robo1 Ig1-4 and Robo1 Ig5, together with a negative stain electron microscopy reconstruction of the Robo1 ectodomain. These results show how the Robo1 ectodomain is arranged as compact dimers, mainly mediated by the central Ig domains, which can further interact in a "back-to-back" fashion to generate a tetrameric assembly. We also observed no change in Robo1 oligomerization upon interaction with the dimeric Slit2-N ligand using fluorescent imaging. Taken together with previous studies we propose that Slit2-N binding results in a conformational change of Robo1 to trigger cell signaling.

  • Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble Outstation, 71 avenue des Martyrs, 38042 Grenoble, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Roundabout homolog 1385Homo sapiensMutation(s): 0 
Gene Names: ROBO1DUTT1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y6N7 (Homo sapiens)
Explore Q9Y6N7 
Go to UniProtKB:  Q9Y6N7
GTEx:  ENSG00000169855 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y6N7
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAG

Download Ideal Coordinates CCD File 
B [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.156α = 90
b = 99.711β = 90
c = 238.673γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-02-14
    Changes: Database references
  • Version 1.2: 2018-05-02
    Changes: Data collection, Database references
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.4: 2024-01-17
    Changes: Data collection, Database references, Refinement description, Structure summary