9NRN | pdb_00009nrn

Lipoprotein Lipase Helical Filament with 11 nm diameter

• PDB DOI: https://doi.org/10.2210/pdb9NRN/pdb
• EM Map EMD-49738: EMDB EMDataResource

• Classification: HYDROLASE
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 2025-03-14 Released: 2025-08-13 
• Deposition Author(s): Gunn, K.H., Wheless, A., Neher, S.B.
• Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Starting Model: experimental

Literature

Cryogenic electron tomography reveals helical organization of lipoprotein lipase in storage vesicles.

Gunn, K.H., Wheless, A., Calcraft, T., Kreutzberger, M., El-Houshy, K., Egelman, E.H., Rosenthal, P.B., Neher, S.B.

(2025) Sci Adv 11: eadx8711-eadx8711

• PubMed: 40768583 
• DOI: https://doi.org/10.1126/sciadv.adx8711
• Primary Citation of Related Structures:  
  9NRN


• PubMed Abstract: 
  

  Lipoprotein lipase (LPL) is a triglyceride lipase that is contained in intracellular vesicles in an inactive storage form before secretion, but the precise structural details have not yet been resolved. Using cryo-electron tomography (cryo-ET), we observe that LPL exists inside of storage vesicles as a filament with an 11-nanometer diameter and is packed in these vesicles in two distinct patterns. Next, we solved a 4.2-Å resolution cryo-electron microscopy (cryo-EM) structure of this 11-nanometer LPL filament using purified protein. The filament is made of repeating pairs of LPL molecules with occluded active sites, rendering the LPL inactive. The comparison of the in situ subtomogram average and the in vitro cryo-EM structure indicates that the previously uncharacterized physiological storage form of LPL is an inactive filament.

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Organizational Affiliation: 
• Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY 11790, USA.
Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Structural Biology of Cells and Viruses Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA.

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Homo 18-mer - A18 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 880.23 kDa 
• Atom Count: 61,884 
• Modeled Residue Count: 7,812 
• Deposited Residue Count: 7,812 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Lipoprotein lipase	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R	434	Bos taurus	Mutation(s): 0  EC: 3.1.1.34 (PDB Primary Data), 3.1.1.32 (PDB Primary Data)
UniProt
Find proteins for P11151 (Bos taurus) Explore P11151  Go to UniProtKB:  P11151

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-08-13 
Deposition Author(s): Gunn, K.H., Wheless, A., Neher, S.B.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	R01 HL125654
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	R01 HL163352
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R00 GM146024-04
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM122510

Revision History  

• Version 1.0: 2025-08-13
  Type: Initial release
  
• Version 1.1: 2025-08-20
  Changes: Data collection, Database references