Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

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

Biological Assembly 2  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 2 assigned by authors and generated by PQS (software)

Biological Assembly 3  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 3 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 140941.25 
• Atom Count: 9556 
• Residue Count: 1209 
• Unique protein chains: 1

1O6U

The Crystal Structure of Human Supernatant Protein Factor

• DOI: 10.2210/pdb1O6U/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21


• Deposited: 2002-10-16 Released: 2003-10-17 
• Deposition Author(s): Stocker, A., Schulze-Briese, C., Tomizaki, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.226 
• R-Value Work: 0.204 

Literature

Crystal Structure of Human Supernatant Protein Factor

Stocker, A., Tomizaki, T., Schulze-Briese, C., Baumann, U.

(2002) Structure 10: 1533

• PubMed: 12429094 
• Also Cited By: 1XGG


• PubMed Abstract: 
  

Supernatant protein factor (SPF) promotes the epoxidation of squalene catalyzed by microsomes. Several studies suggest its in vivo role in the cholesterol biosynthetic pathway by a yet unknown mechanism. SPF belongs to a family of lipid binding proteins called CRAL_TRIO, which include yeast phosphatidylinositol transfer protein Sec14 and tocopherol transfer protein TTP. The crystal structure of human SPF at a resolution of 1.9 A reveals a two domain topology. The N-terminal 275 residues form a Sec14-like domain, while the C-terminal 115 residues consist of an eight-stranded jelly-roll barrel similar to that found in many viral protein structures. The ligand binding cavity has a peculiar horseshoe-like shape. Contrary to the Sec14 crystal structure, the lipid-exchange loop is in a closed conformation, suggesting a mechanism for lipid exchange.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, Bern, Switzerland. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
SEC14-LIKE PROTEIN 2	A, C, E	403	Homo sapiens	Mutation(s): 0  Gene Names: SEC14L2 (C22orf6, KIAA1186, KIAA1658)
Find proteins for O76054 (Homo sapiens) Go to Gene View: SEC14L2 Go to UniProtKB:  O76054

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PLM	A, C, E	PALMITIC ACID C16 H32 O2 IPCSVZSSVZVIGE-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, C, E	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.226 
• R-Value Work: 0.204 
• Space Group: P 1

Unit Cell:

Length (Å)	Angle (°)
a = 59.794	α = 116.26
b = 84.240	β = 102.39
c = 87.111	γ = 99.87

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-10-16 
• Released Date: 2003-10-17 
• Deposition Author(s): Stocker, A., Schulze-Briese, C., Tomizaki, T.

Revision History 

• Version 1.0: 2003-10-17
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance