6OAU

Apo Structure of WT Lipoprotein Lipase in Complex with GPIHBP1 Mutant N78D N82D produced in GnTI-deficient HEK293-F cells


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

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Literature

Structure of lipoprotein lipase in complex with GPIHBP1.

Arora, R.Nimonkar, A.V.Baird, D.Wang, C.Chiu, C.H.Horton, P.A.Hanrahan, S.Cubbon, R.Weldon, S.Tschantz, W.R.Mueller, S.Brunner, R.Lehr, P.Meier, P.Ottl, J.Voznesensky, A.Pandey, P.Smith, T.M.Stojanovic, A.Flyer, A.Benson, T.E.Romanowski, M.J.Trauger, J.W.

(2019) Proc Natl Acad Sci U S A 116: 10360-10365

  • DOI: 10.1073/pnas.1820171116
  • Primary Citation of Related Structures:  
    6OAZ, 6OAU, 6OB0

  • PubMed Abstract: 
  • Lipoprotein lipase (LPL) plays a central role in triglyceride (TG) metabolism. By catalyzing the hydrolysis of TGs present in TG-rich lipoproteins (TRLs), LPL facilitates TG utilization and regulates circulating TG and TRL concentrations. Until very recently, structural information for LPL was limited to homology models, presumably due to the propensity of LPL to unfold and aggregate ...

    Lipoprotein lipase (LPL) plays a central role in triglyceride (TG) metabolism. By catalyzing the hydrolysis of TGs present in TG-rich lipoproteins (TRLs), LPL facilitates TG utilization and regulates circulating TG and TRL concentrations. Until very recently, structural information for LPL was limited to homology models, presumably due to the propensity of LPL to unfold and aggregate. By coexpressing LPL with a soluble variant of its accessory protein glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 (GPIHBP1) and with its chaperone protein lipase maturation factor 1 (LMF1), we obtained a stable and homogenous LPL/GPIHBP1 complex that was suitable for structure determination. We report here X-ray crystal structures of human LPL in complex with human GPIHBP1 at 2.5-3.0 Å resolution, including a structure with a novel inhibitor bound to LPL. Binding of the inhibitor resulted in ordering of the LPL lid and lipid-binding regions and thus enabled determination of the first crystal structure of LPL that includes these important regions of the protein. It was assumed for many years that LPL was only active as a homodimer. The structures and additional biochemical data reported here are consistent with a new report that LPL, in complex with GPIHBP1, can be active as a monomeric 1:1 complex. The crystal structures illuminate the structural basis for LPL-mediated TRL lipolysis as well as LPL stabilization and transport by GPIHBP1.


    Organizational Affiliation

    Cardiovascular and Metabolic Disease Area, Novartis Institutes for Biomedical Research, Cambridge, MA 02139; michael.romanowski@novartis.com john.trauger@novartis.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Lipoprotein lipaseA, B448Homo sapiensMutation(s): 0 
Gene Names: GPIHBP1HBP1LPLLIPD
EC: 3.1.1.34 (PDB Primary Data), 3.1.1.32 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P06858 (Homo sapiens)
Explore P06858 
Go to UniProtKB:  P06858
PHAROS:  P06858
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Glycosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1C, D131Homo sapiensMutation(s): 2 
Gene Names: GPIHBP1HBP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IV16 (Homo sapiens)
Explore Q8IV16 
Go to UniProtKB:  Q8IV16
PHAROS:  Q8IV16
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 177.48α = 90
b = 97.25β = 93.47
c = 77.21γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
BUSTERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-08
    Type: Initial release
  • Version 1.1: 2019-05-22
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-05
    Changes: Data collection, Database references
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary