7UAZ

Crystal structure of human CYP3A4 with the caged inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.239 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Ir(III)-Based Agents for Monitoring the Cytochrome P450 3A4 Active Site Occupancy.

Denison, M.Steinke, S.J.Majeed, A.Turro, C.Kocarek, T.A.Sevrioukova, I.F.Kodanko, J.J.

(2022) Inorg Chem 61: 13673-13677

  • DOI: https://doi.org/10.1021/acs.inorgchem.2c02587
  • Primary Citation of Related Structures:  
    7UAY, 7UAZ

  • PubMed Abstract: 

    Cytochromes P450 (CYPs) are a superfamily of enzymes responsible for biosynthesis and drug metabolism. Monitoring the activity of CYP3A4, the major human drug-metabolizing enzyme, is vital for assessing the metabolism of pharmaceuticals and identifying harmful drug-drug interactions. Existing probes for CYP3A4 are irreversible turn-on substrates that monitor activity at specific time points in end-point assays. To provide a more dynamic approach, we designed, synthesized, and characterized emissive Ir(III) and Ru(II) complexes that allow monitoring of the CYP3A4 active-site occupancy in real time. In the bound state, probe emission is quenched by the active-site heme. Upon displacement from the active site by CYP3A4-specific inhibitors or substrates, these probes show high emission turn-on. Direct probe binding to the CYP3A4 active site was confirmed by X-ray crystallography. The lead Ir(III)-based probe has nanomolar K d and high selectivity for CYP3A4, efficient cellular uptake, and low toxicity in CYP3A4-overexpressing HepG2 cells.


  • Organizational Affiliation

    Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome P450 3A4487Homo sapiensMutation(s): 0 
Gene Names: CYP3A4CYP3A3
EC: 1.14.14.1 (PDB Primary Data), 1.14.14.56 (PDB Primary Data), 1.14.14.73 (PDB Primary Data), 1.14.14.55 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P08684 (Homo sapiens)
Explore P08684 
Go to UniProtKB:  P08684
PHAROS:  P08684
GTEx:  ENSG00000160868 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08684
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
O3L (Subject of Investigation/LOI)
Query on O3L

Download Ideal Coordinates CCD File 
C [auth A](N-[([2,2'-bipyridin]-5-yl-kappa~2~N~1~,N~1'~)methyl]-3-{[(pyridin-3-yl)methyl]sulfanyl}propanamide)bis[2-(pyridin-2-yl-kappaN)phenyl-kappaC~1~]iridium
C42 H36 Ir N6 O S
QMZANNRXXNOPDT-UHFFFAOYSA-N
HEM
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.239 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.77α = 90
b = 100.93β = 90
c = 132.31γ = 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 Institute of Environmental Health Sciences (NIH/NIEHS)United StatesES025767

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-31
    Type: Initial release
  • Version 1.1: 2022-09-14
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description