6E7K

Structure of the lipoprotein lipase GPIHBP1 complex that mediates plasma triglyceride hydrolysis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the lipoprotein lipase-GPIHBP1 complex that mediates plasma triglyceride hydrolysis.

Birrane, G.Beigneux, A.P.Dwyer, B.Strack-Logue, B.Kristensen, K.K.Francone, O.L.Fong, L.G.Mertens, H.D.T.Pan, C.Q.Ploug, M.Young, S.G.Meiyappan, M.

(2019) Proc. Natl. Acad. Sci. U.S.A. 116: 1723-1732

  • DOI: 10.1073/pnas.1817984116

  • PubMed Abstract: 
  • Lipoprotein lipase (LPL) is responsible for the intravascular processing of triglyceride-rich lipoproteins. The LPL within capillaries is bound to GPIHBP1, an endothelial cell protein with a three-fingered LU domain and an N-terminal intrinsically di ...

    Lipoprotein lipase (LPL) is responsible for the intravascular processing of triglyceride-rich lipoproteins. The LPL within capillaries is bound to GPIHBP1, an endothelial cell protein with a three-fingered LU domain and an N-terminal intrinsically disordered acidic domain. Loss-of-function mutations in LPL or GPIHBP1 cause severe hypertriglyceridemia (chylomicronemia), but structures for LPL and GPIHBP1 have remained elusive. Inspired by our recent discovery that GPIHBP1's acidic domain preserves LPL structure and activity, we crystallized an LPL-GPIHBP1 complex and solved its structure. GPIHBP1's LU domain binds to LPL's C-terminal domain, largely by hydrophobic interactions. Analysis of electrostatic surfaces revealed that LPL contains a large basic patch spanning its N- and C-terminal domains. GPIHBP1's acidic domain was not defined in the electron density map but was positioned to interact with LPL's large basic patch, providing a likely explanation for how GPIHBP1 stabilizes LPL. The LPL-GPIHBP1 structure provides insights into mutations causing chylomicronemia.


    Organizational Affiliation

    Finsen Laboratory, Rigshospitalet, DK-2200 Copenhagen, Denmark.,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095.,Biotech Research and Innovation Centre, University of Copenhagen, DK-2200 Copenhagen, Denmark.,Division of Experimental Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215.,Discovery Therapeutics, US Drug Discovery, Shire Pharmaceuticals, Cambridge, MA 02142; sgyoung@mednet.ucla.edu mmeiyappan@shire.com.,Discovery Therapeutics, US Drug Discovery, Shire Pharmaceuticals, Cambridge, MA 02142.,BIOSAXS Group, European Molecular Biology Laboratory Hamburg, D-22607 Hamburg, Germany.,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095; sgyoung@mednet.ucla.edu mmeiyappan@shire.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lipoprotein lipase
A, B
448Homo sapiensMutation(s): 1 
Gene Names: LPL (LIPD)
EC: 3.1.1.34
Find proteins for P06858 (Homo sapiens)
Go to Gene View: LPL
Go to UniProtKB:  P06858
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Glycosylphosphatidylinositol-anchored high density lipoprotein-binding protein 1
C, D
131Homo sapiensMutation(s): 0 
Gene Names: GPIHBP1 (HBP1)
Find proteins for Q8IV16 (Homo sapiens)
Go to Gene View: GPIHBP1
Go to UniProtKB:  Q8IV16
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
FUC
Query on FUC

Download SDF File 
Download CCD File 
A, B
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 101.948α = 90.00
b = 153.206β = 90.00
c = 95.783γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-12-19
    Type: Initial release
  • Version 1.1: 2019-01-02
    Type: Data collection, Database references
  • Version 1.2: 2019-02-13
    Type: Data collection, Database references