2XOT

Crystal structure of neuronal leucine rich repeat protein AMIGO-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

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Literature

Crystal Structure and Role of Glycans and Dimerisation in Folding of Neuronal Leucine-Rich Repeat Protein Amigo-1

Kajander, T.Kuja-Panula, J.Rauvala, H.Goldman, A.

(2011) J Mol Biol 413: 1001

  • DOI: 10.1016/j.jmb.2011.09.032
  • Primary Citation of Related Structures:  
    2XOT

  • PubMed Abstract: 
  • AMIGO-1 is the parent member of a novel family of three cell surface leucine-rich repeat (LRR) proteins. Its expression is induced by the binding of HMGB1 (high-mobility group box 1 protein) to RAGE (receptor for advanced glycation end products) on neuro ...

    AMIGO-1 is the parent member of a novel family of three cell surface leucine-rich repeat (LRR) proteins. Its expression is induced by the binding of HMGB1 (high-mobility group box 1 protein) to RAGE (receptor for advanced glycation end products) on neurons. Binding of HMGB1 to RAGE is known to have a direct effect on cellular growth regulation and mobility, and AMIGO-1 directly supports growth of neuronal processes and fasciculation of neurites. In addition, the second member of the AMIGO-family, AMIGO-2, has been implicated in adhesion of tumor cells in adenocarcinoma and survival of neurons. We have determined the crystal structure of AMIGO-1 at 2.0 Å resolution, which reveals a typical cell surface LRR domain arrangement with N- and C-terminal capping domains with disulfide bridges, followed by a C2-type Ig domain. AMIGO-1 is a dimer, with the LRR regions forming the dimer interface, and sequence conservation analysis and static light-scattering measurements suggest that all three AMIGO family proteins form similar dimers. Based on the AMIGO-1 structure, we have also modeled AMIGO-2 and present small-angle X-ray scattering data on AMIGO-2 and AMIGO-3. Our mutagenesis studies show that AMIGO-1 dimerization is necessary for proper cell surface expression and thus probably for proper or stable folding in the endoplastic reticulum and for the function of the protein. Based on the data presented earlier, we also suggest that dimerization through the LRR-LRR interface is likely to be involved in cell-cell adhesion by AMIGO-1, while extensive glycosylation may have a role.


    Organizational Affiliation

    Institute of Biotechnology, Structural Biology and Biophysics, University of Helsinki, 00014 Helsinki, Finland. tommi.kajander@helsinki.fi



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Amphoterin-induced protein 1 AB361Mus musculusMutation(s): 0 
Gene Names: Amigo1Ali2AmigoKiaa1163
Find proteins for Q80ZD8 (Mus musculus)
Explore Q80ZD8 
Go to UniProtKB:  Q80ZD8
NIH Common Fund Data Resources
IMPC:  MGI:2653612
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
3 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.44α = 90
b = 74.63β = 98.66
c = 87.27γ = 90
Software Package:
Software NamePurpose
PHASERmodel building
XDSdata scaling
SHELXphasing
SHARPphasing
DMphasing
PHASERphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-21
    Type: Initial release
  • Version 1.1: 2011-09-28
    Changes: Database references
  • Version 1.2: 2011-10-19
    Changes: Database references
  • Version 1.3: 2011-11-23
    Changes: Database references
  • Version 1.4: 2018-06-06
    Changes: Data collection, Database references, Source and taxonomy, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary