5E58

Crystal Structure Of Cytochrome P450 2B35 from Desert Woodrat Neotoma Lepida in complex with 4-(4-chlorophenyl)imidazole


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.220 

Starting Model: experimental
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This is version 2.1 of the entry. See complete history


Literature

Structure-Function Analysis of Mammalian CYP2B Enzymes Using 7-Substituted Coumarin Derivatives as Probes: Utility of Crystal Structures and Molecular Modeling in Understanding Xenobiotic Metabolism.

Shah, M.B.Liu, J.Huo, L.Zhang, Q.Dearing, M.D.Wilderman, P.R.Szklarz, G.D.Stout, C.D.Halpert, J.R.

(2016) Mol Pharmacol 89: 435-445

  • DOI: https://doi.org/10.1124/mol.115.102111
  • Primary Citation of Related Structures:  
    5E0E, 5E58

  • PubMed Abstract: 

    Crystal structures of CYP2B35 and CYP2B37 from the desert woodrat were solved in complex with 4-(4-chlorophenyl)imidazole (4-CPI). The closed conformation of CYP2B35 contained two molecules of 4-CPI within the active site, whereas the CYP2B37 structure demonstrated an open conformation with three 4-CPI molecules, one within the active site and the other two in the substrate access channel. To probe structure-function relationships of CYP2B35, CYP2B37, and the related CYP2B36, we tested the O-dealkylation of three series of related substrates-namely, 7-alkoxycoumarins, 7-alkoxy-4-(trifluoromethyl)coumarins, and 7-alkoxy-4-methylcoumarins-with a C1-C7 side chain. CYP2B35 showed the highest catalytic efficiency (kcat/KM) with 7-heptoxycoumarin as a substrate, followed by 7-hexoxycoumarin. In contrast, CYP2B37 showed the highest catalytic efficiency with 7-ethoxy-4-(trifluoromethyl)coumarin (7-EFC), followed by 7-methoxy-4-(trifluoromethyl)coumarin (7-MFC). CYP2B35 had no dealkylation activity with 7-MFC or 7-EFC. Furthermore, the new CYP2B-4-CPI-bound structures were used as templates for docking the 7-substituted coumarin derivatives, which revealed orientations consistent with the functional studies. In addition, the observation of multiple -Cl and -NH-π interactions of 4-CPI with the aromatic side chains in the CYP2B35 and CYP2B37 structures provides insight into the influence of such functional groups on CYP2B ligand binding affinity and specificity. To conclude, structural, computational, and functional analysis revealed striking differences between the active sites of CYP2B35 and CYP2B37 that will aid in the elucidation of new structure-activity relationships.


  • Organizational Affiliation

    School of Pharmacy, University of Connecticut, Storrs, Connecticut (M.B.S., J.L., L.H., P.R.W., J.R.H.); Department of Integrative Structural and Computational Biology, Scripps Research Institute, La Jolla, California (Q.Z., C.D.S.); Department of Biology, University of Utah, Salt Lake City, Utah (M.D.D.); and Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia (G.D.S.) manish.shah@uconn.edu.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome P450 family 2 subfamily B
A, B, C, D, E
A, B, C, D, E, F
493Neotoma lepidaMutation(s): 0 
Gene Names: CYP2B
EC: 1.14.14.1
UniProt
Find proteins for J9JD66 (Neotoma lepida)
Explore J9JD66 
Go to UniProtKB:  J9JD66
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ9JD66
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose
G
2N/A
Glycosylation Resources
GlyTouCan:  G05551OP
GlyCosmos:  G05551OP
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
CA [auth F]
H [auth A]
M [auth B]
Q [auth C]
U [auth D]
CA [auth F],
H [auth A],
M [auth B],
Q [auth C],
U [auth D],
X [auth E]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
CM5
Query on CM5

Download Ideal Coordinates CCD File 
AA [auth E],
K [auth A]
5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE
C23 H42 O11
RVTGFZGNOSKUDA-ZNGNCRBCSA-N
CPZ
Query on CPZ

Download Ideal Coordinates CCD File 
DA [auth F]
EA [auth F]
I [auth A]
J [auth A]
N [auth B]
DA [auth F],
EA [auth F],
I [auth A],
J [auth A],
N [auth B],
O [auth B],
R [auth C],
S [auth C],
V [auth D],
W [auth D],
Y [auth E],
Z [auth E]
4-(4-CHLOROPHENYL)IMIDAZOLE
C9 H7 Cl N2
DVKIFCXVRCGAEE-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
BA [auth E],
L [auth A],
P [auth B],
T [auth C]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.220 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.079α = 64.61
b = 106.066β = 82.53
c = 106.198γ = 69.93
Software Package:
Software NamePurpose
REFMACrefinement
Blu-Icedata collection
SCALAdata scaling
PHENIXphasing
MOSFLMdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United States1256840

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-10
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2019-11-27
    Changes: Author supporting evidence
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2023-09-27
    Changes: Data collection, Database references, Refinement description, Structure summary