Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 62.55 kDa 
• Atom Count: 4545 
• Modelled Residue Count: 530 
• Deposited Residue Count: 536 
• Unique protein chains: 1

4LXJ

Saccharomyces cerevisiae lanosterol 14-alpha demethylase with lanosterol bound

• PDB DOI: 10.2210/pdb4LXJ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Saccharomyces cerevisiae
• Expression System: Saccharomyces cerevisiae
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2013-07-29 Released: 2014-01-29 
• Deposition Author(s): Monk, B.C., Tomasiak, T.M., Keniya, M.V., Huschmann, F.U., Tyndall, J.D.A., O'Connell III, J.D., Cannon, R.D., McDonald, J., Rodriguez, A., Finer-Moore, J., Stroud, R.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.227 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 

Literature

Architecture of a single membrane spanning cytochrome P450 suggests constraints that orient the catalytic domain relative to a bilayer.

Monk, B.C., Tomasiak, T.M., Keniya, M.V., Huschmann, F.U., Tyndall, J.D., O'Connell, J.D., Cannon, R.D., McDonald, J.G., Rodriguez, A., Finer-Moore, J.S., Stroud, R.M.

(2014) Proc Natl Acad Sci U S A 111: 3865-3870

• PubMed: 24613931 
• DOI: 10.1073/pnas.1324245111
• Primary Citation of Related Structures:  
  4LXJ, 5EQB


• PubMed Abstract: 
  

Bitopic integral membrane proteins with a single transmembrane helix play diverse roles in catalysis, cell signaling, and morphogenesis. Complete monospanning protein structures are needed to show how interaction between the transmembrane helix and catalytic domain might influence association with the membrane and function. We report crystal structures of full-length Saccharomyces cerevisiae lanosterol 14α-demethylase, a membrane monospanning cytochrome P450 of the CYP51 family that catalyzes the first postcyclization step in ergosterol biosynthesis and is inhibited by triazole drugs. The structures reveal a well-ordered N-terminal amphipathic helix preceding a putative transmembrane helix that would constrain the catalytic domain orientation to lie partly in the lipid bilayer. The structures locate the substrate lanosterol, identify putative substrate and product channels, and reveal constrained interactions with triazole antifungal drugs that are important for drug design and understanding drug resistance.

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Organizational Affiliation: 

Sir John Walsh Research Institute, Department of Oral Sciences, Faculty of Dentistry, and School of Pharmacy, University of Otago, Dunedin 9054, New Zealand.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Lanosterol 14-alpha demethylase	A	536	Saccharomyces cerevisiae	Mutation(s): 0  Gene Names: ERG11, CYP51, YHR007C EC: 1.14.13.70 (PDB Primary Data), 1.14.14.154 (UniProt) Membrane Entity: Yes
UniProt
Find proteins for P10614 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P10614  Go to UniProtKB:  P10614

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	B [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
LAN	C [auth A]	LANOSTEROL C30 H50 O CAHGCLMLTWQZNJ-BQNIITSRSA-N
OXY	D [auth A]	OXYGEN MOLECULE O2 MYMOFIZGZYHOMD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.227 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.213	α = 90
b = 67.005	β = 99.54
c = 80.378	γ = 90

Software Package:

Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-07-29 
• Released Date: 2014-01-29 
Deposition Author(s): Monk, B.C., Tomasiak, T.M., Keniya, M.V., Huschmann, F.U., Tyndall, J.D.A., O'Connell III, J.D., Cannon, R.D., McDonald, J., Rodriguez, A., Finer-Moore, J., Stroud, R.M.

Revision History  

• Version 1.0: 2014-01-29
  Type: Initial release
  
• Version 1.1: 2014-02-05
  Changes: Structure summary
• Version 1.2: 2014-03-26
  Changes: Database references