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: 2.8 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.250 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1016/j.str.2013.04.005

  • 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 GoLo ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
G-protein-signaling modulator 2
A, B
333Mus musculusMutation(s): 0 
Gene Names: Gpsm2 (Lgn, Pins)
Find proteins for Q8VDU0 (Mus musculus)
Go to UniProtKB:  Q8VDU0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.250 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.213α = 90.00
b = 81.803β = 90.00
c = 106.942γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
HKL-2000data reduction
PHENIXrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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