3RBQ

Co-crystal structure of human UNC119 (retina gene 4) and an N-terminal Transducin-alpha mimicking peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

UNC119 is required for G protein trafficking in sensory neurons.

Zhang, H.Constantine, R.Vorobiev, S.Chen, Y.Seetharaman, J.Huang, Y.J.Xiao, R.Montelione, G.T.Gerstner, C.D.Davis, M.W.Inana, G.Whitby, F.G.Jorgensen, E.M.Hill, C.P.Tong, L.Baehr, W.

(2011) Nat Neurosci 14: 874-880

  • DOI: https://doi.org/10.1038/nn.2835
  • Primary Citation of Related Structures:  
    3RBQ

  • PubMed Abstract: 

    UNC119 is widely expressed among vertebrates and other phyla. We found that UNC119 recognized the acylated N terminus of the rod photoreceptor transducin α (Tα) subunit and Caenorhabditis elegans G proteins ODR-3 and GPA-13. The crystal structure of human UNC119 at 1.95-Å resolution revealed an immunoglobulin-like β-sandwich fold. Pulldowns and isothermal titration calorimetry revealed a tight interaction between UNC119 and acylated Gα peptides. The structure of co-crystals of UNC119 with an acylated Tα N-terminal peptide at 2.0 Å revealed that the lipid chain is buried deeply into UNC119's hydrophobic cavity. UNC119 bound Tα-GTP, inhibiting its GTPase activity, thereby providing a stable UNC119-Tα-GTP complex capable of diffusing from the inner segment back to the outer segment after light-induced translocation. UNC119 deletion in both mouse and C. elegans led to G protein mislocalization. Thus, UNC119 is a Gα subunit cofactor essential for G protein trafficking in sensory cilia.


  • Organizational Affiliation

    Department of Ophthalmology, University of Utah Health Science Center, Salt Lake City, Utah, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein unc-119 homolog A
A, B, C, D, E
A, B, C, D, E, F
195Homo sapiensMutation(s): 0 
Gene Names: UNC119RG4
UniProt & NIH Common Fund Data Resources
Find proteins for Q13432 (Homo sapiens)
Explore Q13432 
Go to UniProtKB:  Q13432
PHAROS:  Q13432
GTEx:  ENSG00000109103 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13432
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(t) subunit alpha-1
G, H, I, J, K
G, H, I, J, K, L
11Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P11488 (Homo sapiens)
Explore P11488 
Go to UniProtKB:  P11488
PHAROS:  P11488
GTEx:  ENSG00000114349 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11488
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.546α = 90
b = 79.713β = 90
c = 189.59γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-07-20
    Changes: Database references
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description