5SY1

Structure of the STRA6 receptor for retinol uptake in complex with calmodulin


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the STRA6 receptor for retinol uptake.

Chen, Y.Clarke, O.B.Kim, J.Stowe, S.Kim, Y.K.Assur, Z.Cavalier, M.Godoy-Ruiz, R.von Alpen, D.C.Manzini, C.Blaner, W.S.Frank, J.Quadro, L.Weber, D.J.Shapiro, L.Hendrickson, W.A.Mancia, F.

(2016) Science 353: --

  • DOI: 10.1126/science.aad8266
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Vitamin A homeostasis is critical to normal cellular function. Retinol-binding protein (RBP) is the sole specific carrier in the bloodstream for hydrophobic retinol, the main form in which vitamin A is transported. The integral membrane receptor STRA ...

    Vitamin A homeostasis is critical to normal cellular function. Retinol-binding protein (RBP) is the sole specific carrier in the bloodstream for hydrophobic retinol, the main form in which vitamin A is transported. The integral membrane receptor STRA6 mediates cellular uptake of vitamin A by recognizing RBP-retinol to trigger release and internalization of retinol. We present the structure of zebrafish STRA6 determined to 3.9-angstrom resolution by single-particle cryo-electron microscopy. STRA6 has one intramembrane and nine transmembrane helices in an intricate dimeric assembly. Unexpectedly, calmodulin is bound tightly to STRA6 in a noncanonical arrangement. Residues involved with RBP binding map to an archlike structure that covers a deep lipophilic cleft. This cleft is open to the membrane, suggesting a possible mode for internalization of retinol through direct diffusion into the lipid bilayer.


    Organizational Affiliation

    Department of Medicine, Columbia University, New York, NY 10032, USA.,Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA.,Department of Pharmacology and Physiology and Department of Integrative Systems Biology, George Washington University, Washington, DC 20037, USA.,Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA.,The Center for Biomolecular Therapeutics and Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.,Department of Food Science and Rutgers Center for Lipid Research, Rutgers University, New Brunswick, NJ 08901, USA.,Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA. Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA.,Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA. fm123@cumc.columbia.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
C, D
149Spodoptera frugiperdaMutation(s): 0 
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Novel Receptors
Protein: 
STRA6 retinol-uptake receptor in complex with calmodulin (CaM)
Find proteins for A0A1C7D1B9 (Spodoptera frugiperda)
Go to UniProtKB:  A0A1C7D1B9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
STRA6
A, B
670Danio rerioMutation(s): 0 
Gene Names: stra6
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Novel Receptors
Protein: 
STRA6 retinol-uptake receptor in complex with calmodulin (CaM)
Find proteins for F1RAX4 (Danio rerio)
Go to UniProtKB:  F1RAX4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CLR
Query on CLR

Download SDF File 
Download CCD File 
A, B
CHOLESTEROL
C27 H46 O
HVYWMOMLDIMFJA-DPAQBDIFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-09-07
    Type: Database references
  • Version 1.2: 2017-07-26
    Type: Data collection, Database references
  • Version 1.3: 2018-07-18
    Type: Data collection, Experimental preparation