Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 121665.44 
• Atom Count: 8530 
• Residue Count: 1090 
• Unique protein chains: 1

4BE9

Open conformation of O. piceae sterol esterase

• DOI: 10.2210/pdb4BE9/pdb

• Classification: HYDROLASE
• Organism(s): Ophiostoma piceae
• Expression System: Komagataella pastoris


• Deposited: 2013-03-06 Released: 2014-03-26 
• Deposition Author(s): Gutierrez-Fernandez, J., Vaquero, M.E., Prieto, A., Barriuso, J., Gonzalez, M.J., Hermoso, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.206 
• R-Value Work: 0.168 

Literature

Crystal Structures of Ophiostoma Piceae Sterol Esterase: Structural Insights Into Activation Mechanism and Product Release.

Gutierrez-Fernandez, J., Vaquero, M.E., Prieto, A., Barriuso, J., Martinez, M.J., Hermoso, J.A.

(2014) J.Struct.Biol. 187: 215

• PubMed: 25108239 
• DOI: 10.1016/j.jsb.2014.07.007
• Primary Citation of Related Structures:  
  4UPD, 4BE4


• PubMed Abstract: 
  

Sterol esterases are able to efficiently hydrolyze both sterol esters and triglycerides and to carry out synthesis reactions in the presence of organic solvents. Their high versatility makes them excellent candidates for biotechnological purposes. Sterol esterase from fungus Ophiostoma piceae (OPE) belongs to the family abH03.01 of the Candida rugosa lipase-like proteins. Crystal structures of OPE were solved in this study for the closed and open conformations. Enzyme activation involves a large displacement of the conserved lid, structural rearrangements of loop α16-α17, and formation of a dimer with a large opening. Three PEG molecules are placed in the active site, mimicking chains of the triglyceride substrate, demonstrating the position of the oxyanion hole and the three pockets that accommodate the sn-1, sn-2 and sn-3 fatty acids chains. One of them is an internal tunnel, connecting the active center with the outer surface of the enzyme 30 Å far from the catalytic Ser220. Based on our structural and biochemical results we propose a mechanism by which a great variety of different substrates can be hydrolyzed in OPE paving the way for the construction of new variants to improve the catalytic properties of these enzymes and their biotechnological applications.

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Organizational Affiliation: 

Departamento de Cristalografía y Biología Estructural, Instituto de Química-Física "Rocasolano", CSIC, Serrano 119, 28006 Madrid, Spain.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
STEROL ESTERASE	A, B	545	Ophiostoma piceae	Mutation(s): 0  EC: 3.1.1.-
Find proteins for Q2TFW1 (Ophiostoma piceae) Go to UniProtKB:  Q2TFW1

Small Molecules

Ligands 7 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GOL	A, B	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
PGE	A, B	TRIETHYLENE GLYCOL C6 H14 O4 ZIBGPFATKBEMQZ-UHFFFAOYSA-N
PEG	A, B	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
NO3	A, B	NITRATE ION N O3 NHNBFGGVMKEFGY-UHFFFAOYSA-N
NAG	A, B	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
1PE	A	PENTAETHYLENE GLYCOL PEG400 C10 H22 O6 JLFNLZLINWHATN-UHFFFAOYSA-N
7P9	A, B	[(2R)-2-heptanoyloxy-3-phosphonooxy-propyl] nonanoate C19 H37 O8 P XKPYMIOWFWFMRM-QGZVFWFLSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.206 
• R-Value Work: 0.168 
• Space Group: I 4₁

Unit Cell:

Length (Å)	Angle (°)
a = 164.123	α = 90.00
b = 164.123	β = 90.00
c = 93.994	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
PHENIX	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-03-06 
• Released Date: 2014-03-26 
• Deposition Author(s): Gutierrez-Fernandez, J., Vaquero, M.E., Prieto, A., Barriuso, J., Gonzalez, M.J., Hermoso, J.A.

Revision History 

• Version 1.0: 2014-03-26
  Type: Initial release
• Version 1.1: 2014-09-24
  Type: Database references