9PXB | pdb_00009pxb

Hamster Scap/Insig-2 complex with cholesterol and bound Fab4G10

• PDB DOI: https://doi.org/10.2210/pdb9PXB/pdb
• EM Map EMD-71964: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Cricetulus griseus, Mus musculus
• Expression System: Homo sapiens
• Mutation(s): Yes 


• Deposited: 2025-08-05 Released: 2025-12-24 
• Deposition Author(s): Williams, B.C., Kober, D.L., Bai, X., Radhakrishnan, A., Rosenbaum, D.M.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Hamster Scap/Insig-2 bound to cholesterol

Williams, B.C., Rosenbaum, D.M.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 168.09 kDa 
• Atom Count: 7,638 
• Modeled Residue Count: 950 
• Deposited Residue Count: 1,503 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sterol regulatory element-binding protein cleavage-activating protein	A	797	Cricetulus griseus	Mutation(s): 7  Gene Names: SCAP
UniProt
Find proteins for P97260 (Cricetulus griseus) Explore P97260  Go to UniProtKB:  P97260
Glycosylation
Glycosylation Sites: 1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin-induced gene protein	B [auth C]	225	Cricetulus griseus	Mutation(s): 0  Gene Names: Insig2
UniProt
Find proteins for Q8CFA5 (Cricetulus griseus) Explore Q8CFA5  Go to UniProtKB:  Q8CFA5

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab4G10 heavy chain	C [auth H]	252	Mus musculus	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab4G10 light chain	D [auth L]	229	Mus musculus	Mutation(s): 0

Oligosaccharides

Help

Entity ID: 5
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E [auth B]	2		N-Glycosylation

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR (Subject of Investigation/LOI)	F [auth C], G [auth C], H [auth C]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487:
RECONSTRUCTION	RELION

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-24 
Deposition Author(s): Williams, B.C., Kober, D.L., Bai, X., Radhakrishnan, A., Rosenbaum, D.M.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R35GM116387
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	P01HL160487
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	R01AI158357

Revision History  

• Version 1.0: 2025-12-24
  Type: Initial release