6E6K

Crystal structure of human cellular retinol-binding protein 4 in complex with abnormal-cannabidiol (abn-CBD)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Abnormal Cannabidiol Modulates Vitamin A Metabolism by Acting as a Competitive Inhibitor of CRBP1.

Silvaroli, J.A.Widjaja-Adhi, M.A.K.Trischman, T.Chelstowska, S.Horwitz, S.Banerjee, S.Kiser, P.D.Blaner, W.S.Golczak, M.

(2019) ACS Chem Biol 14: 434-448

  • DOI: https://doi.org/10.1021/acschembio.8b01070
  • Primary Citation of Related Structures:  
    6E5L, 6E5T, 6E5W, 6E6K, 6E6M

  • PubMed Abstract: 

    Cellular retinol-binding proteins (CRBPs) facilitate the uptake and intracellular transport of vitamin A. They integrate retinoid metabolism, playing an important role in regulating the synthesis of bioactive vitamin A metabolites. Thus, CRBPs constitute potential pharmacological targets to modulate cellular retinoid status that in turn may have applications in the treatment of certain immunological, metabolic, and ocular disorders. Here we identify abnormal cannabidiol (abn-CBD) as a nonretinoid inhibitor of cellular retinol-binding protein 1 (CRBP1). X-ray crystal structures of CRBP1 in complex with abn-CBD and its derivatives revealed a distinctive mode of protein-ligand interaction and provided a molecular basis for the high affinity and selectivity of this compound. We demonstrated that abn-CBD modulates the flux of retinoids via the retinoid cycle in vivo. Furthermore, the biological activity of abn-CBD was evidenced by its ability to protect against light-induced retinal damage in Balb/cJ mice. Altogether, our findings indicate that targeting selected CRBPs with a small-molecule inhibitor can potentially lead to the development of new therapeutic agents to counteract diseases with etiologies involving imbalance in retinoid metabolism or signaling.


  • Organizational Affiliation

    Kent State University , Kent , OH , United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Retinoid-binding protein 7137Homo sapiensMutation(s): 0 
Gene Names: RBP7
UniProt & NIH Common Fund Data Resources
Find proteins for Q96R05 (Homo sapiens)
Explore Q96R05 
Go to UniProtKB:  Q96R05
PHAROS:  Q96R05
GTEx:  ENSG00000162444 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96R05
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HVD
Query on HVD

Download Ideal Coordinates CCD File 
B [auth A](1'R,2'R)-5'-methyl-6-pentyl-2'-(prop-1-en-2-yl)-1',2',3',4'-tetrahydro[1,1'-biphenyl]-2,4-diol
C21 H30 O2
YWEZXUNAYVCODW-RBUKOAKNSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.039α = 90
b = 57.39β = 103.67
c = 67.99γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Eye Institute (NIH/NEI)United StatesEY023948

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-13
    Type: Initial release
  • Version 1.1: 2019-08-28
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description