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Yorodumi- PDB-6e7k: Structure of the lipoprotein lipase GPIHBP1 complex that mediates... -
+Open data
-Basic information
Entry | Database: PDB / ID: 6e7k | |||||||||
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Title | Structure of the lipoprotein lipase GPIHBP1 complex that mediates plasma triglyceride hydrolysis | |||||||||
Components |
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Keywords | HYDROLASE / hydrolase-cofactor complex / lipid degradation | |||||||||
Function / homology | Function and homology information chylomicron binding / positive regulation of chylomicron remnant clearance / lipoprotein lipase / lipoprotein lipase activity / positive regulation of sequestering of triglyceride / low-density lipoprotein particle mediated signaling / chylomicron remodeling / response to heparin / lipase binding / positive regulation of cholesterol storage ...chylomicron binding / positive regulation of chylomicron remnant clearance / lipoprotein lipase / lipoprotein lipase activity / positive regulation of sequestering of triglyceride / low-density lipoprotein particle mediated signaling / chylomicron remodeling / response to heparin / lipase binding / positive regulation of cholesterol storage / lipoprotein lipase activator activity / phospholipase A1 / phosphatidylserine 1-acylhydrolase activity / 1-acyl-2-lysophosphatidylserine acylhydrolase activity / phospholipase A1 activity / phospholipase activity / triglyceride catabolic process / Assembly of active LPL and LIPC lipase complexes / Post-translational modification: synthesis of GPI-anchored proteins / positive regulation of lipoprotein lipase activity / protein transporter activity / very-low-density lipoprotein particle remodeling / positive regulation of macrophage derived foam cell differentiation / Chylomicron remodeling / positive regulation of lipid storage / chylomicron / acetylcholine receptor inhibitor activity / cellular response to nutrient / very-low-density lipoprotein particle / transcytosis / protein import / triglyceride lipase activity / positive regulation of chemokine (C-X-C motif) ligand 2 production / protein localization to cell surface / heparan sulfate proteoglycan binding / triglyceride homeostasis / cellular response to fatty acid / triglyceride metabolic process / lipoprotein particle binding / apolipoprotein binding / catalytic complex / positive regulation of fat cell differentiation / phospholipid metabolic process / response to glucose / protein-membrane adaptor activity / Retinoid metabolism and transport / positive regulation of chemokine production / positive regulation of adipose tissue development / fatty acid metabolic process / positive regulation of interleukin-1 beta production / cholesterol homeostasis / response to bacterium / intracellular protein transport / Transcriptional regulation of white adipocyte differentiation / positive regulation of inflammatory response / fatty acid biosynthetic process / positive regulation of interleukin-6 production / positive regulation of tumor necrosis factor production / heparin binding / basolateral plasma membrane / protein stabilization / apical plasma membrane / external side of plasma membrane / signaling receptor binding / lipid binding / calcium ion binding / cell surface / protein homodimerization activity / extracellular space / extracellular region / plasma membrane Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.8 Å | |||||||||
Authors | Birrane, G. / Meiyappan, M. | |||||||||
Citation | Journal: Proc Natl Acad Sci U S A / Year: 2019 Title: Structure of the lipoprotein lipase-GPIHBP1 complex that mediates plasma triglyceride hydrolysis. Authors: Gabriel Birrane / Anne P Beigneux / Brian Dwyer / Bettina Strack-Logue / Kristian Kølby Kristensen / Omar L Francone / Loren G Fong / Haydyn D T Mertens / Clark Q Pan / Michael Ploug / ...Authors: Gabriel Birrane / Anne P Beigneux / Brian Dwyer / Bettina Strack-Logue / Kristian Kølby Kristensen / Omar L Francone / Loren G Fong / Haydyn D T Mertens / Clark Q Pan / Michael Ploug / Stephen G Young / Muthuraman Meiyappan / 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- ...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 or 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. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 6e7k.cif.gz | 418.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb6e7k.ent.gz | 341.2 KB | Display | PDB format |
PDBx/mmJSON format | 6e7k.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/e7/6e7k ftp://data.pdbj.org/pub/pdb/validation_reports/e7/6e7k | HTTPS FTP |
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-Related structure data
Related structure data | 1hplS S: Starting model for refinement C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: 0 / Refine code: 0
NCS ensembles :
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-Components
-Protein , 2 types, 4 molecules ABCD
#1: Protein | Mass: 50379.016 Da / Num. of mol.: 2 / Fragment: UNP residues 28-475 / Mutation: R324A Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: LPL, LIPD / Plasmid: pZ804N / Cell line (production host): HT1080 / Production host: Homo sapiens (human) / Tissue (production host): Connective tissue / References: UniProt: P06858, lipoprotein lipase #2: Protein | Mass: 14725.788 Da / Num. of mol.: 2 / Fragment: UNP residues 21-151 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: GPIHBP1, HBP1 / Plasmid: pFastbac-1 / Cell line (production host): sf9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q8IV16 |
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-Sugars , 4 types, 5 molecules
#3: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose |
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#4: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose |
#5: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose |
#7: Sugar |
-Non-polymers , 2 types, 18 molecules
#6: Chemical | #8: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 2.87 Å3/Da / Density % sol: 57.18 % / Description: cubic |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop / Details: 200 mM magnesium acetate, 20% PEG3350 |
-Data collection
Diffraction | Mean temperature: 125 K |
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Diffraction source | Source: SYNCHROTRON / Site: ESRF / Beamline: ID30B / Wavelength: 1 Å |
Detector | Type: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Dec 9, 2017 / Details: Be CRL/Si elliptical mirror |
Radiation | Monochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 2.8→95.8 Å / Num. obs: 37662 / % possible obs: 99.4 % / Redundancy: 3.3 % / CC1/2: 0.985 / Rsym value: 0.01 / Net I/σ(I): 13.5 |
Reflection shell | Resolution: 2.8→2.9 Å / Redundancy: 3.2 % / Mean I/σ(I) obs: 1.5 / CC1/2: 0.728 / Rsym value: 0.53 / % possible all: 99.7 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: PDB entry 1HPL Resolution: 2.8→48.41 Å / Cor.coef. Fo:Fc: 0.956 / Cor.coef. Fo:Fc free: 0.936 / SU B: 35.926 / SU ML: 0.295 / Cross valid method: THROUGHOUT / ESU R: 0.859 / ESU R Free: 0.32 / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 94.934 Å2
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Refinement step | Cycle: 1 / Resolution: 2.8→48.41 Å
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Refine LS restraints |
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