1H5Z

CYTOCHROME P450 14 ALPHA-STEROL DEMETHYLASE (CYP51) FROM MYCOBACTERIUM TUBERCULOSIS IN FERRIC LOW-SPIN STATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Estriol Bound and Ligand-Free Structures of Sterol 14Alpha-Demethylase.

Podust, L.M.Yermalitskaya, L.V.Lepesheva, G.I.Podust, V.N.Dalmasso, E.A.Waterman, M.R.

(2004) Structure 12: 1937

  • DOI: 10.1016/j.str.2004.08.009
  • Primary Citation of Related Structures:  1X8V

  • PubMed Abstract: 
  • Sterol 14alpha-demethylases (CYP51) are essential enzymes in sterol biosynthesis in eukaryotes and drug targets in antifungal therapy. Here, we report CYP51 structures in ligand-free and estriol bound forms. Using estriol as a probe, we determined or ...

    Sterol 14alpha-demethylases (CYP51) are essential enzymes in sterol biosynthesis in eukaryotes and drug targets in antifungal therapy. Here, we report CYP51 structures in ligand-free and estriol bound forms. Using estriol as a probe, we determined orientation of the substrate in the active site, elucidated protein contacts with the invariant 3beta-hydroxy group of a sterol, and identified F78 as a key discriminator between 4alpha-methylated and 4alpha,beta-dimethylated substrates. Analysis of CYP51 dynamics revealed that the C helix undergoes helix-coil transition upon binding and dissociation of a ligand. Loss of helical structure of the C helix in the ligand-free form results in an unprecedented opening of the substrate binding site. Upon binding of estriol, the BC loop loses contacts with molecular surface and tends to adopt a closed conformation. A mechanism for azole resistance in the yeast pathogen Candida albicans associated with mutations in the ERG11 gene encoding CYP51 is suggested based on CYP51 protein dynamics.


    Related Citations: 
    • Crystal Structure of Cytochrome P450 14Alpha -Sterol Demethylase (Cyp51) from Mycobacterium Tuberculosis in Complex with Azole Inhibitors.
      Podust, L.M.,Poulos, T.L.,Waterman, M.R.
      (2001) Proc.Natl.Acad.Sci.USA 98: 3068
    • Substrate Recognition Sites in 14Alpha-Sterol Demethylase from Comparative Analysis of Amino Acid Sequences and X-Ray Structure of Mycobacterium Tuberculosis Cyp51.
      Podust, L.M.,Stojan, J.,Poulos, T.L.,Waterman, M.R.
      (2001) J.Inorg.Biochem. 87: 227


    Organizational Affiliation

    Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA. larissa.m.podust@vanderbilt.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME P450 51
A
455Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Gene Names: cyp51
EC: 1.14.13.70
Find proteins for P9WPP9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WPP9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
FE2
Query on FE2

Download SDF File 
Download CCD File 
A
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.489α = 90.00
b = 84.827β = 90.00
c = 110.025γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-03
    Type: Initial release
  • Version 1.1: 2015-04-15
    Type: Database references, Derived calculations, Non-polymer description, Other, Version format compliance
  • Version 1.2: 2015-08-05
    Type: Derived calculations, Other, Source and taxonomy