4JHR

An auto-inhibited conformation of LGN reveals a distinct interaction mode between GoLoco motifs and TPR motifs


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.253 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

An autoinhibited conformation of LGN reveals a distinct interaction mode between GoLoco motifs and TPR motifs

Pan, Z.Zhu, J.Shang, Y.Wei, Z.Jia, M.Xia, C.Wen, W.Wang, W.Zhang, M.

(2013) Structure 21: 1007-1017

  • DOI: https://doi.org/10.1016/j.str.2013.04.005
  • Primary Citation of Related Structures:  
    4JHR

  • PubMed Abstract: 

    LGN plays essential roles in asymmetric cell divisions via its N-terminal TPR-motif-mediated binding to mInsc and NuMA. This scaffolding activity requires the release of the autoinhibited conformation of LGN by binding of Gα(i) to its C-terminal GoLoco (GL) motifs. The interaction between the GL and TPR motifs of LGN represents a distinct GL/target binding mode with an unknown mechanism. Here, we show that two consecutive GL motifs of LGN form a minimal TPR-motif-binding unit. GL12 and GL34 bind to TPR0-3 and TPR4-7, respectively. The crystal structure of a truncated LGN reveals that GL34 forms a pair of parallel α helices and binds to the concave surface of TPR4-7, thereby preventing LGN from binding to other targets. Importantly, the GLs bind to TPR motifs with a mode distinct from that observed in the GL/Gα(i)·GDP complexes. Our results also indicate that multiple and orphan GL motif proteins likely respond to G proteins with distinct mechanisms.


  • Organizational Affiliation

    Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
G-protein-signaling modulator 2
A, B
333Mus musculusMutation(s): 0 
Gene Names: Gpsm2LgnPins
UniProt & NIH Common Fund Data Resources
Find proteins for Q8VDU0 (Mus musculus)
Explore Q8VDU0 
Go to UniProtKB:  Q8VDU0
IMPC:  MGI:1923373
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8VDU0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.253 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.213α = 90
b = 81.803β = 90
c = 106.942γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-06-05
    Type: Initial release
  • Version 1.1: 2013-09-04
    Changes: Database references
  • Version 1.2: 2017-08-02
    Changes: Refinement description, Source and taxonomy
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Refinement description