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 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1038/nn.2835

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein unc-119 homolog A
A, B, C, D, E, F
195Homo sapiensMutation(s): 0 
Gene Names: UNC119 (RG4)
Find proteins for Q13432 (Homo sapiens)
Go to Gene View: UNC119
Go to UniProtKB:  Q13432
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(t) subunit alpha-1
G, H, I, J, K, L
11Homo sapiensMutation(s): 0 
Gene Names: GNAT1 (GNATR)
Find proteins for P11488 (Homo sapiens)
Go to Gene View: GNAT1
Go to UniProtKB:  P11488
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
DAO
Query on DAO
G, H, I, J, K, L
NON-POLYMERC12 H24 O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.546α = 90.00
b = 79.713β = 90.00
c = 189.590γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
REFMACphasing
HKL-2000data reduction
HKL-2000data collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-07-20
    Type: Database references